kolibrios/kernel/trunk/kernel.asm

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Copyright (C) KolibriOS team 2004-2008. All rights reserved.
;; PROGRAMMING:
;; Ivan Poddubny
;; Marat Zakiyanov (Mario79)
;; VaStaNi
;; Trans
;; Mihail Semenyako (mike.dld)
;; Sergey Kuzmin (Wildwest)
;; Andrey Halyavin (halyavin)
;; Mihail Lisovin (Mihasik)
;; Andrey Ignatiev (andrew_programmer)
;; NoName
;; Evgeny Grechnikov (Diamond)
;; Iliya Mihailov (Ghost)
;; Sergey Semyonov (Serge)
;; Johnny_B
;; SPraid (simba)
;; Hidnplayr
;;
;; Data in this file was originally part of MenuetOS project which is
;; distributed under the terms of GNU GPL. It is modified and redistributed as
;; part of KolibriOS project under the terms of GNU GPL.
;;
;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa
;; PROGRAMMING:
;;
;; Ville Mikael Turjanmaa, villemt@itu.jyu.fi
;; - main os coding/design
;; Jan-Michael Brummer, BUZZ2@gmx.de
;; Felix Kaiser, info@felix-kaiser.de
;; Paolo Minazzi, paolo.minazzi@inwind.it
;; quickcode@mail.ru
;; Alexey, kgaz@crosswinds.net
;; Juan M. Caravaca, bitrider@wanadoo.es
;; kristol@nic.fi
;; Mike Hibbett, mikeh@oceanfree.net
;; Lasse Kuusijarvi, kuusijar@lut.fi
;; Jarek Pelczar, jarekp3@wp.pl
;;
;; KolibriOS is distributed in the hope that it will be useful, but WITHOUT ANY
;; WARRANTY. No author or distributor accepts responsibility to anyone for the
;; consequences of using it or for whether it serves any particular purpose or
;; works at all, unless he says so in writing. Refer to the GNU General Public
;; License (the "GPL") for full details.
;
;; Everyone is granted permission to copy, modify and redistribute KolibriOS,
;; but only under the conditions described in the GPL. A copy of this license
;; is supposed to have been given to you along with KolibriOS so you can know
;; your rights and responsibilities. It should be in a file named COPYING.
;; Among other things, the copyright notice and this notice must be preserved
;; on all copies.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

include 'macros.inc'

$Revision$


USE_COM_IRQ     equ 1      ; make irq 3 and irq 4 available for PCI devices

; Enabling the next line will enable serial output console
;debug_com_base  equ 0x3f8  ; 0x3f8 is com1, 0x2f8 is com2, 0x3e8 is com3, 0x2e8 is com4, no irq's are used

include "proc32.inc"
include "kglobals.inc"
include "lang.inc"

include "const.inc"
max_processes    equ   255
tss_step         equ   (128+8192) ; tss & i/o - 65535 ports, * 256=557056*4


os_stack       equ  (os_data_l-gdts)    ; GDTs
os_code        equ  (os_code_l-gdts)
graph_data     equ  (3+graph_data_l-gdts)
tss0           equ  (tss0_l-gdts)
app_code       equ  (3+app_code_l-gdts)
app_data       equ  (3+app_data_l-gdts)
app_tls        equ  (3+tls_data_l-gdts)
pci_code_sel   equ  (pci_code_32-gdts)
pci_data_sel   equ  (pci_data_32-gdts)


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;   Included files:
;;
;;   Kernel16.inc
;;    - Booteng.inc   English text for bootup
;;    - Bootcode.inc  Hardware setup
;;    - Pci16.inc     PCI functions
;;
;;   Kernel32.inc
;;    - Sys32.inc     Process management
;;    - Shutdown.inc  Shutdown and restart
;;    - Fat32.inc     Read / write hd
;;    - Vesa12.inc    Vesa 1.2 driver
;;    - Vesa20.inc    Vesa 2.0 driver
;;    - Vga.inc       VGA driver
;;    - Stack.inc     Network interface
;;    - Mouse.inc     Mouse pointer
;;    - Scincode.inc  Window skinning
;;    - Pci32.inc     PCI functions
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                                      ;;
;;                  16 BIT ENTRY FROM BOOTSECTOR                        ;;
;;                                                                      ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

use16
                  org   0x0
                  jmp   start_of_code

version db    'Kolibri OS  version 0.7.5.0      ',13,10,13,10,0

include "boot/bootstr.inc"     ; language-independent boot messages
include "boot/preboot.inc"

if lang eq en
include "boot/booteng.inc"     ; english system boot messages
else if lang eq ru
include "boot/bootru.inc"      ; russian system boot messages
include "boot/ru.inc"          ; Russian font
else if lang eq et
include "boot/bootet.inc"      ; estonian system boot messages
include "boot/et.inc"          ; Estonian font
else
include "boot/bootge.inc"      ; german system boot messages
end if

include "boot/bootcode.inc"    ; 16 bit system boot code
include "bus/pci/pci16.inc"
include "detect/biosdisk.inc"

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                                      ;;
;;                  SWITCH TO 32 BIT PROTECTED MODE                     ;;
;;                                                                      ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


; CR0 Flags - Protected mode and Paging

        mov ecx, CR0_PE

; Enabling 32 bit protected mode

        sidt    [cs:old_ints_h]

        cli                             ; disable all irqs
        cld
        mov     al,255                  ; mask all irqs
        out     0xa1,al
        out     0x21,al
   l.5: in      al, 0x64                ; Enable A20
        test    al, 2
        jnz     l.5
        mov     al, 0xD1
        out     0x64, al
   l.6: in      al, 0x64
        test    al, 2
        jnz     l.6
        mov     al, 0xDF
        out     0x60, al
   l.7: in      al, 0x64
        test    al, 2
        jnz     l.7
        mov     al, 0xFF
        out     0x64, al

        lgdt    [cs:tmp_gdt]            ; Load GDT
        mov     eax, cr0                ; protected mode
        or      eax, ecx
        and     eax, 10011111b *65536*256 + 0xffffff ; caching enabled
        mov     cr0, eax
        jmp     pword os_code:B32       ; jmp to enable 32 bit mode

align 8
tmp_gdt:

        dw     23
        dd     tmp_gdt+0x10000
        dw     0

        dw     0xffff
        dw     0x0000
        db     0x00
        dw     11011111b *256 +10011010b
        db     0x00

        dw     0xffff
        dw     0x0000
        db     0x00
        dw     11011111b *256 +10010010b
        db     0x00

include "data16.inc"

use32
org $+0x10000

align 4
B32:
           mov   ax,os_stack       ; Selector for os
           mov   ds,ax
           mov   es,ax
           mov   fs,ax
           mov   gs,ax
           mov   ss,ax
           mov   esp,0x3ec00       ; Set stack

; CLEAR 0x280000 - HEAP_BASE

           xor   eax,eax
           mov   edi,0x280000
           mov   ecx,(HEAP_BASE-OS_BASE-0x280000) / 4
           cld
           rep   stosd

           mov   edi,0x40000
           mov   ecx,(0x90000-0x40000)/4
           rep   stosd

; CLEAR KERNEL UNDEFINED GLOBALS
           mov   edi, endofcode-OS_BASE
           mov   ecx, (uglobals_size/4)+4
           rep   stosd

; SAVE & CLEAR 0-0xffff

           xor esi, esi
           mov   edi,0x2F0000
           mov   ecx,0x10000 / 4
           rep   movsd
           mov   edi,0x1000
           mov   ecx,0xf000 / 4
           rep   stosd

           call test_cpu
           bts [cpu_caps-OS_BASE], CAPS_TSC     ;force use rdtsc

           call init_BIOS32
; MEMORY MODEL
           call mem_test
           call init_mem
           call init_page_map

; ENABLE PAGING

           mov eax, sys_pgdir-OS_BASE
           mov cr3, eax

           mov eax,cr0
           or eax,CR0_PG+CR0_WP
           mov cr0,eax

           lgdt [gdts]
           jmp pword os_code:high_code

align 4
bios32_entry    dd ?
tmp_page_tabs   dd ?

use16
org $-0x10000
include "boot/shutdown.inc" ; shutdown or restart
org $+0x10000
use32

__DEBUG__ fix 1
__DEBUG_LEVEL__ fix 1
include 'init.inc'

org OS_BASE+$

align 4
high_code:
           mov ax, os_stack
           mov bx, app_data
           mov cx, app_tls
           mov ss, ax
           add esp, OS_BASE

           mov ds, bx
           mov es, bx
           mov fs, cx
           mov gs, bx

           bt [cpu_caps], CAPS_PGE
           jnc @F

           or dword [sys_pgdir+(OS_BASE shr 20)], PG_GLOBAL

           mov ebx, cr4
           or ebx, CR4_PGE
           mov cr4, ebx
@@:
           xor eax, eax
           mov dword [sys_pgdir], eax
           mov dword [sys_pgdir+4], eax

           mov eax, cr3
           mov cr3, eax           ; flush TLB

; SAVE REAL MODE VARIABLES
        mov     ax, [BOOT_VAR + 0x9031]
        mov     [IDEContrRegsBaseAddr], ax
; --------------- APM ---------------------

; init selectors
    mov ebx,    [BOOT_VAR+0x9040]              ; offset of APM entry point
    movzx eax, word [BOOT_VAR+0x9050] ; real-mode segment base address of
                                      ; protected-mode 32-bit code segment
    movzx ecx, word [BOOT_VAR+0x9052] ; real-mode segment base address of
                                      ; protected-mode 16-bit code segment
    movzx edx, word [BOOT_VAR+0x9054] ; real-mode segment base address of
                                      ; protected-mode 16-bit data segment

    shl    eax, 4
    mov    [dword apm_code_32 + 2], ax
    shr    eax, 16
    mov    [dword apm_code_32 + 4], al

    shl    ecx, 4
    mov    [dword apm_code_16 + 2], cx
    shr    ecx, 16
    mov    [dword apm_code_16 + 4], cl

    shl    edx, 4
    mov    [dword apm_data_16 + 2], dx
    shr    edx, 16
    mov    [dword apm_data_16 + 4], dl

    mov    dword[apm_entry], ebx
    mov    word [apm_entry + 4], apm_code_32 - gdts

    mov    eax, [BOOT_VAR + 0x9044]    ; version & flags
    mov    [apm_vf], eax
; -----------------------------------------
;        movzx eax,byte [BOOT_VAR+0x9010]  ; mouse port
;        mov   [0xF604],byte 1  ;al
        mov     al, [BOOT_VAR+0x901F]   ; DMA access
        mov     [allow_dma_access], al
        mov   al,[BOOT_VAR+0x9000]        ; bpp
        mov   [ScreenBPP],al

        movzx eax,word [BOOT_VAR+0x900A]  ; X max
        dec   eax
        mov   [Screen_Max_X],eax
        mov   [screen_workarea.right],eax
        movzx eax,word [BOOT_VAR+0x900C]  ; Y max
        dec   eax
        mov   [Screen_Max_Y],eax
        mov   [screen_workarea.bottom],eax
        movzx eax,word [BOOT_VAR+0x9008]  ; screen mode
        mov   [SCR_MODE],eax
        mov   eax,[BOOT_VAR+0x9014]       ; Vesa 1.2 bnk sw add
        mov   [BANK_SWITCH],eax
        mov   [BytesPerScanLine],word 640*4         ; Bytes PerScanLine
        cmp   [SCR_MODE],word 0x13          ; 320x200
        je    @f
        cmp   [SCR_MODE],word 0x12          ; VGA 640x480
        je    @f
        mov   ax,[BOOT_VAR+0x9001]        ; for other modes
        mov   [BytesPerScanLine],ax
@@:
        mov     esi, BOOT_VAR+0x9080
        movzx   ecx, byte [esi-1]
        mov     [NumBiosDisks], ecx
        mov     edi, BiosDisksData
        rep     movsd

; GRAPHICS ADDRESSES

        mov     byte [BOOT_VAR+0x901e],0x0
        mov     eax,[BOOT_VAR+0x9018]
        mov     [LFBAddress],eax

        cmp     [SCR_MODE],word 0100000000000000b
        jge     setvesa20
        cmp     [SCR_MODE],word 0x13
        je      v20ga32
        mov     [PUTPIXEL],dword Vesa12_putpixel24  ; Vesa 1.2
        mov     [GETPIXEL],dword Vesa12_getpixel24
        cmp     [ScreenBPP],byte 24
        jz      ga24
        mov     [PUTPIXEL],dword Vesa12_putpixel32
        mov     [GETPIXEL],dword Vesa12_getpixel32
      ga24:
        jmp     v20ga24
      setvesa20:
        mov     [PUTPIXEL],dword Vesa20_putpixel24  ; Vesa 2.0
        mov     [GETPIXEL],dword Vesa20_getpixel24
        cmp     [ScreenBPP],byte 24
        jz      v20ga24
      v20ga32:
        mov     [PUTPIXEL],dword Vesa20_putpixel32
        mov     [GETPIXEL],dword Vesa20_getpixel32
      v20ga24:
        cmp     [SCR_MODE],word 0x12                ; 16 C VGA 640x480
        jne     no_mode_0x12
        mov     [PUTPIXEL],dword VGA_putpixel
        mov     [GETPIXEL],dword Vesa20_getpixel32
      no_mode_0x12:

; -------- Fast System Call init ----------
; Intel SYSENTER/SYSEXIT (AMD CPU support it too)
           bt [cpu_caps], CAPS_SEP
           jnc .SEnP   ; SysEnter not Present
           xor edx, edx
           mov ecx, MSR_SYSENTER_CS
           mov eax, os_code
           wrmsr
           mov ecx, MSR_SYSENTER_ESP
;           mov eax, sysenter_stack ; Check it
           xor     eax, eax
           wrmsr
           mov ecx, MSR_SYSENTER_EIP
           mov eax, sysenter_entry
           wrmsr
.SEnP:
; AMD SYSCALL/SYSRET
           cmp byte[cpu_vendor], 'A'
           jne .noSYSCALL
           mov eax, 0x80000001
           cpuid
           test edx, 0x800  ; bit_11 - SYSCALL/SYSRET support
           jz .noSYSCALL
           mov ecx, MSR_AMD_EFER
           rdmsr
           or eax, 1   ; bit_0 - System Call Extension (SCE)
           wrmsr

        ; !!!! It`s dirty hack, fix it !!!
        ; Bits of EDX :
        ; Bit 31<33>16 During the SYSRET instruction, this field is copied into the CS register
        ;  and the contents of this field, plus 8, are copied into the SS register.
        ; Bit 15<31>0 During the SYSCALL instruction, this field is copied into the CS register
        ;  and the contents of this field, plus 8, are copied into the SS register.

        ; mov   edx, (os_code + 16) * 65536 + os_code
           mov edx, 0x1B0008

           mov eax, syscall_entry
           mov ecx, MSR_AMD_STAR
           wrmsr
.noSYSCALL:
; -----------------------------------------

; LOAD IDT

           call build_interrupt_table ;lidt is executed
          ;lidt [idtreg]

           call init_kernel_heap
           stdcall kernel_alloc, RING0_STACK_SIZE+512
           mov [os_stack_seg], eax

           lea esp, [eax+RING0_STACK_SIZE]

           mov [tss._ss0], os_stack
           mov [tss._esp0], esp
           mov [tss._esp], esp
           mov [tss._cs],os_code
           mov [tss._ss],os_stack
           mov [tss._ds],app_data
           mov [tss._es],app_data
           mov [tss._fs],app_data
           mov [tss._gs],app_data
           mov [tss._io],128
;Add IO access table - bit array of permitted ports
           mov edi, tss._io_map_0
           xor eax, eax
           not eax
           mov ecx, 8192/4
           rep stosd                 ; access to 4096*8=65536 ports

           mov  ax,tss0
           ltr  ax

           mov [LFBSize], 0x800000
           call init_LFB
           call init_fpu
           call init_malloc

           stdcall alloc_kernel_space, 0x51000
           mov [default_io_map], eax

           add eax, 0x2000
           mov [ipc_tmp], eax
           mov ebx, 0x1000

           add eax, 0x40000
           mov [proc_mem_map], eax

           add eax, 0x8000
           mov [proc_mem_pdir], eax

           add eax, ebx
           mov [proc_mem_tab], eax

           add eax, ebx
           mov [tmp_task_pdir], eax

           add eax, ebx
           mov [tmp_task_ptab], eax

           add eax, ebx
           mov [ipc_pdir], eax

           add eax, ebx
           mov [ipc_ptab], eax

           stdcall kernel_alloc, (unpack.LZMA_BASE_SIZE+(unpack.LZMA_LIT_SIZE shl \
                                 (unpack.lc+unpack.lp)))*4

           mov [unpack.p], eax

           call init_events
           mov eax, srv.fd-SRV_FD_OFFSET
           mov [srv.fd], eax
           mov [srv.bk], eax

           mov edi, irq_tab
           xor eax, eax
           mov ecx, 16
           rep stosd

;Set base of graphic segment to linear address of LFB
        mov     eax,[LFBAddress]          ; set for gs
        mov     [graph_data_l+2],ax
        shr     eax,16
        mov     [graph_data_l+4],al
        mov     [graph_data_l+7],ah

        mov [CURRENT_TASK],dword 1
        mov [TASK_COUNT],dword 1
        mov [TASK_BASE],dword TASK_DATA
        mov [current_slot], SLOT_BASE+256

; set background
        xor  eax,eax
        inc  eax
        mov   [BgrDrawMode],eax
        mov   [BgrDataWidth],eax
        mov   [BgrDataHeight],eax
        mov    [mem_BACKGROUND], 4
        mov [img_background], static_background_data

        mov     [SLOT_BASE + 256 + APPDATA.dir_table], sys_pgdir - OS_BASE

        stdcall kernel_alloc, 0x10000/8
        mov     edi, eax
        mov     [network_free_ports], eax
        or      eax, -1
        mov     ecx, 0x10000/32
        rep     stosd

; REDIRECT ALL IRQ'S TO INT'S 0x20-0x2f

        call  rerouteirqs

; Initialize system V86 machine
        call    init_sys_v86

; TIMER SET TO 1/100 S

        mov   al,0x34              ; set to 100Hz
        out   0x43,al
        mov   al,0x9b              ; lsb    1193180 / 1193
        out   0x40,al
        mov   al,0x2e              ; msb
        out   0x40,al

; Enable timer IRQ (IRQ0) and hard drives IRQs (IRQ14, IRQ15)
; they are used: when partitions are scanned, hd_read relies on timer
; Also enable IRQ2, because in some configurations
; IRQs from slave controller are not delivered until IRQ2 on master is enabled
        mov     al, 0xFA
        out     0x21, al
        mov     al, 0x3F
        out     0xA1, al

;!!!!!!!!!!!!!!!!!!!!!!!!!!
include 'detect/disks.inc'
;!!!!!!!!!!!!!!!!!!!!!!!!!!

  call Parser_params

; READ RAMDISK IMAGE FROM HD

;!!!!!!!!!!!!!!!!!!!!!!!
include 'boot/rdload.inc'
;!!!!!!!!!!!!!!!!!!!!!!!
;    mov    [dma_hdd],1
; CALCULATE FAT CHAIN FOR RAMDISK

        call  calculatefatchain

; LOAD VMODE DRIVER

;!!!!!!!!!!!!!!!!!!!!!!!
include 'vmodeld.inc'
;!!!!!!!!!!!!!!!!!!!!!!!

  mov ax,[OS_BASE+0x10000+bx_from_load]
  cmp ax,'r1'           ; if using not ram disk, then load librares and parameters {SPraid.simba}
  je  no_lib_load
; LOADING LIBRARES
   stdcall dll.Load,@IMPORT                 ; loading librares for kernel (.obj files)
   call load_file_parse_table               ; prepare file parse table
   call set_kernel_conf                     ; configure devices and gui
no_lib_load:

; LOAD FONTS I and II

        stdcall read_file, char, FONT_I, 0, 2304
        stdcall read_file, char2, FONT_II, 0, 2560

        mov   esi,boot_fonts
        call  boot_log

; PRINT AMOUNT OF MEMORY
        mov     esi, boot_memdetect
        call    boot_log

        movzx   ecx, word [boot_y]
        or      ecx, (10+29*6) shl 16 ; "Determining amount of memory"
        sub     ecx, 10
        mov     edx, 0xFFFFFF
        mov     ebx, [MEM_AMOUNT]
        shr     ebx, 20
        mov     edi, 1
        mov     eax, 0x00040000
        call    display_number_force

; BUILD SCHEDULER

        call   build_scheduler ; sys32.inc

        mov    esi,boot_devices
        call   boot_log

        mov  [pci_access_enabled],1


; SET PRELIMINARY WINDOW STACK AND POSITIONS

        mov   esi,boot_windefs
        call  boot_log
        call  setwindowdefaults

; SET BACKGROUND DEFAULTS

        mov   esi,boot_bgr
        call  boot_log
        call  init_background
        call  calculatebackground

; RESERVE SYSTEM IRQ'S JA PORT'S

        mov   esi,boot_resirqports
        call  boot_log
        call  reserve_irqs_ports

; SET PORTS FOR IRQ HANDLERS

        mov  esi,boot_setrports
        call boot_log
        ;call setirqreadports

; SET UP OS TASK

        mov  esi,boot_setostask
        call boot_log

        xor  eax, eax
        mov  dword [SLOT_BASE+APPDATA.fpu_state], fpu_data
        mov  dword [SLOT_BASE+APPDATA.exc_handler], eax
        mov  dword [SLOT_BASE+APPDATA.except_mask], eax

        ; name for OS/IDLE process

        mov dword [SLOT_BASE+256+APPDATA.app_name],   dword 'OS/I'
        mov dword [SLOT_BASE+256+APPDATA.app_name+4], dword 'DLE '
        mov edi, [os_stack_seg]
        mov dword [SLOT_BASE+256+APPDATA.pl0_stack], edi
        add edi, 0x2000-512
        mov dword [SLOT_BASE+256+APPDATA.fpu_state], edi
        mov dword [SLOT_BASE+256+APPDATA.saved_esp0], edi ; just for case
        mov dword [SLOT_BASE+256+APPDATA.io_map],\
                  (tss._io_map_0-OS_BASE+PG_MAP)
        mov dword [SLOT_BASE+256+APPDATA.io_map+4],\
                  (tss._io_map_1-OS_BASE+PG_MAP)

        mov esi, fpu_data
        mov ecx, 512/4
        cld
        rep movsd

        mov dword [SLOT_BASE+256+APPDATA.exc_handler], eax
        mov dword [SLOT_BASE+256+APPDATA.except_mask], eax

        mov ebx, SLOT_BASE+256+APP_OBJ_OFFSET
        mov  dword [SLOT_BASE+256+APPDATA.fd_obj], ebx
        mov  dword [SLOT_BASE+256+APPDATA.bk_obj], ebx

        mov  dword [SLOT_BASE+256+APPDATA.cur_dir], sysdir_path
        mov dword [SLOT_BASE+256+APPDATA.tls_base], eax

        ; task list
        mov  [CURRENT_TASK],dword 1
        mov  [TASK_COUNT],dword 1
        mov  [current_slot], SLOT_BASE+256
        mov  [TASK_BASE],dword TASK_DATA
        mov  [TASK_DATA+TASKDATA.wnd_number], 1 ; on screen number
        mov  [TASK_DATA+TASKDATA.pid], 1        ; process id number
        mov  [TASK_DATA+TASKDATA.mem_start], 0  ; process base address

        call init_cursors
        mov eax, [def_cursor]
        mov [SLOT_BASE+APPDATA.cursor],eax
        mov [SLOT_BASE+APPDATA.cursor+256],eax

  ; READ TSC / SECOND

        mov   esi,boot_tsc
        call  boot_log
        cli
        rdtsc ;call  _rdtsc
        mov   ecx,eax
        mov   esi,250               ; wait 1/4 a second
        call  delay_ms
        rdtsc ;call  _rdtsc
        sti
        sub   eax,ecx
        shl   eax,2
        mov   [CPU_FREQ],eax          ; save tsc / sec
;       mov ebx, 1000000
;       div ebx
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        mov     edx, 2251799814
        mul     edx
        shr     edx, 19
        mov [stall_mcs], edx
; PRINT CPU FREQUENCY
        mov     esi, boot_cpufreq
        call    boot_log

        mov     ebx, edx
        movzx   ecx, word [boot_y]
        add     ecx, (10+17*6) shl 16 - 10 ; 'CPU frequency is '
        mov     edx, 0xFFFFFF
        mov     edi, 1
        mov     eax, 0x00040000
        call    display_number_force

; SET VARIABLES

        call  set_variables

; SET MOUSE

        ;call   detect_devices
        stdcall load_driver, szPS2MDriver
;        stdcall load_driver, szCOM_MDriver

        mov   esi,boot_setmouse
        call  boot_log
        call  setmouse


; STACK AND FDC

        call  stack_init
        call  fdc_init

; PALETTE FOR 320x200 and 640x480 16 col

        cmp   [SCR_MODE],word 0x12
        jne   no_pal_vga
        mov   esi,boot_pal_vga
        call  boot_log
        call  paletteVGA
      no_pal_vga:

        cmp   [SCR_MODE],word 0x13
        jne   no_pal_ega
        mov   esi,boot_pal_ega
        call  boot_log
        call  palette320x200
      no_pal_ega:

; LOAD DEFAULT SKIN

        call    load_default_skin

;protect io permission map

           mov esi, [default_io_map]
           stdcall map_page,esi,(tss._io_map_0-OS_BASE), PG_MAP
           add esi, 0x1000
           stdcall map_page,esi,(tss._io_map_1-OS_BASE), PG_MAP

           stdcall map_page,tss._io_map_0,\
                   (tss._io_map_0-OS_BASE), PG_MAP
           stdcall map_page,tss._io_map_1,\
                   (tss._io_map_1-OS_BASE), PG_MAP

  mov ax,[OS_BASE+0x10000+bx_from_load]
  cmp ax,'r1'           ; if not rused ram disk - load network configuration from files {SPraid.simba}
  je  no_st_network
        call set_network_conf
  no_st_network:

; LOAD FIRST APPLICATION
        cli

        cmp   byte [BOOT_VAR+0x9030],1
        jne   no_load_vrr_m

        mov     ebp, vrr_m
        call    fs_execute_from_sysdir

        cmp   eax,2                  ; if vrr_m app found (PID=2)
        je    first_app_found

no_load_vrr_m:

        mov     ebp, firstapp
        call    fs_execute_from_sysdir

        cmp   eax,2                  ; continue if a process has been loaded
        je    first_app_found

        mov     esi, boot_failed
        call    boot_log

        mov   eax, 0xDEADBEEF        ; otherwise halt
        hlt

first_app_found:

        cli

        ;mov   [TASK_COUNT],dword 2
        mov   [CURRENT_TASK],dword 1       ; set OS task fisrt

; SET KEYBOARD PARAMETERS
        mov   al, 0xf6         ; reset keyboard, scan enabled
        call  kb_write

        ; wait until 8042 is ready
        xor ecx,ecx
      @@:
        in     al,64h
        and    al,00000010b
        loopnz @b

       ; mov   al, 0xED       ; svetodiody - only for testing!
       ; call  kb_write
       ; call  kb_read
       ; mov   al, 111b
       ; call  kb_write
       ; call  kb_read

        mov   al, 0xF3       ; set repeat rate & delay
        call  kb_write
;        call  kb_read
        mov   al, 0 ; 30 250 ;00100010b ; 24 500  ;00100100b  ; 20 500
        call  kb_write
;        call  kb_read
     ;// mike.dld [
        call  set_lights
     ;// mike.dld ]


; Setup serial output console (if enabled)

if defined debug_com_base

        ; enable Divisor latch

        mov     dx, debug_com_base+3
        mov     al, 1 shl 7
        out     dx, al

        ; Set speed to 115200 baud (max speed)

        mov     dx, debug_com_base
        mov     al, 0x01
        out     dx, al

        mov     dx, debug_com_base+1
        mov     al, 0x00
        out     dx, al

        ; No parity, 8bits words, one stop bit, dlab bit back to 0

        mov     dx, debug_com_base+3
        mov     al, 3
        out     dx, al

        ; disable interrupts

        mov     dx, debug_com_base+1
        mov     al, 0
        out     dx, al

        ; clear +  enable fifo (64 bits)

        mov     dx, debug_com_base+2
        mov     al, 0x7 + 1 shl 5
        out     dx, al


end if

; START MULTITASKING

if preboot_blogesc
        mov     esi, boot_tasking
        call    boot_log
.bll1:  in      al, 0x60        ; wait for ESC key press
        cmp     al, 129
        jne     .bll1
end if

;       mov   [ENABLE_TASKSWITCH],byte 1        ; multitasking enabled

; UNMASK ALL IRQ'S

        mov   esi,boot_allirqs
        call  boot_log

        cli                          ;guarantee forbidance of interrupts.
        mov   al,0                   ; unmask all irq's
        out   0xA1,al
        out   0x21,al

        mov   ecx,32

     ready_for_irqs:

        mov   al,0x20                ; ready for irqs
        out   0x20,al
        out   0xa0,al

        loop  ready_for_irqs         ; flush the queue

        stdcall attach_int_handler, dword 1, irq1, dword 0

;        mov    [dma_hdd],1
        cmp     [IDEContrRegsBaseAddr], 0
        setnz   [dma_hdd]
        mov [timer_ticks_enable],1              ; for cd driver

        sti
        call change_task

        jmp osloop

;        jmp   $                      ; wait here for timer to take control

        ; Fly :)

include 'unpacker.inc'
include 'fdo.inc'

align 4
boot_log:
         pushad

         mov   ebx,10*65536
         mov   bx,word [boot_y]
         add   [boot_y],dword 10
         mov   ecx,0x80ffffff   ; ASCIIZ string with white color
         mov   edx,esi
         mov   edi,1
         call  dtext

         mov   [novesachecksum],1000
         call  checkVga_N13

         popad

         ret


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                    ;
;                    MAIN OS LOOP START                              ;
;                                                                    ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 32
osloop:
        call   [draw_pointer]
        call   checkbuttons
        call   checkwindows
;       call   check_window_move_request
        call   checkmisc
        call   checkVga_N13
        call   stack_handler
        call   checkidle
        call   check_fdd_motor_status
        call   check_ATAPI_device_event
        jmp    osloop
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                    ;
;                      MAIN OS LOOP END                              ;
;                                                                    ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
align 4
checkidle:
        pushad
        call    change_task
        jmp     idle_loop_entry
  idle_loop:
        cmp     eax,[idlemem]     ; eax == [timer_ticks]
        jne     idle_exit
        rdtsc   ;call _rdtsc
        mov     ecx,eax
        hlt
        rdtsc   ;call _rdtsc
        sub     eax,ecx
        add     [idleuse],eax
  idle_loop_entry:
        mov     eax,[timer_ticks] ; eax =  [timer_ticks]
        cmp     [check_idle_semaphore],0
        je      idle_loop
        dec     [check_idle_semaphore]
  idle_exit:
        mov     [idlemem],eax     ; eax == [timer_ticks]
        popad
        ret

uglobal
  idlemem               dd   0x0
  idleuse               dd   0x0
  idleusesec            dd   0x0
  check_idle_semaphore  dd   0x0
endg



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                      ;
;                   INCLUDED SYSTEM FILES                              ;
;                                                                      ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


include "kernel32.inc"


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;                                                                      ;
;                       KERNEL FUNCTIONS                               ;
;                                                                      ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

reserve_irqs_ports:

        pushad

        mov  [irq_owner+4*0], 1    ; timer
        ;mov  [irq_owner+4*1], 1    ; keyboard
        mov  [irq_owner+4*6], 1    ; floppy diskette
        mov  [irq_owner+4*13], 1   ; math co-pros
        mov  [irq_owner+4*14], 1   ; ide I
        mov  [irq_owner+4*15], 1   ; ide II

        ; RESERVE PORTS
        mov   edi,1                    ; 0x00-0x2d
        mov   [RESERVED_PORTS],edi
        shl   edi,4
        mov   [RESERVED_PORTS+edi+0],dword 1
        mov   [RESERVED_PORTS+edi+4],dword 0x0
        mov   [RESERVED_PORTS+edi+8],dword 0x2d

        inc   dword [RESERVED_PORTS]          ; 0x30-0x4d
        mov   edi,[RESERVED_PORTS]
        shl   edi,4
        mov   [RESERVED_PORTS+edi+0],dword 1
        mov   [RESERVED_PORTS+edi+4],dword 0x30
        mov   [RESERVED_PORTS+edi+8],dword 0x4d

        inc   dword [RESERVED_PORTS]          ; 0x50-0xdf
        mov   edi,[RESERVED_PORTS]
        shl   edi,4
        mov   [RESERVED_PORTS+edi+0],dword 1
        mov   [RESERVED_PORTS+edi+4],dword 0x50
        mov   [RESERVED_PORTS+edi+8],dword 0xdf

        inc   dword [RESERVED_PORTS]          ; 0xe5-0xff
        mov   edi,[RESERVED_PORTS]
        shl   edi,4
        mov   [RESERVED_PORTS+edi+0],dword 1
        mov   [RESERVED_PORTS+edi+4],dword 0xe5
        mov   [RESERVED_PORTS+edi+8],dword 0xff

        popad
        ret

setirqreadports:

        mov   [irq12read+0],dword 0x60 + 0x01000000  ; read port 0x60 , byte
        mov   [irq12read+4],dword 0                  ; end of port list
        ;mov   [irq04read+0],dword 0x3f8 + 0x01000000 ; read port 0x3f8 , byte
        ;mov   [irq04read+4],dword 0                  ; end of port list
        ;mov   [irq03read+0],dword 0x2f8 + 0x01000000 ; read port 0x2f8 , byte
        ;mov   [irq03read+4],dword 0                  ; end of port list

        ret

iglobal
  process_number dd 0x1
endg

set_variables:

        mov   ecx,0x100                       ; flush port 0x60
.fl60:  in    al,0x60
        loop  .fl60
        mov   [MOUSE_BUFF_COUNT],byte 0                 ; mouse buffer
        mov   [KEY_COUNT],byte 0                 ; keyboard buffer
        mov   [BTN_COUNT],byte 0                 ; button buffer
;        mov   [MOUSE_X],dword 100*65536+100    ; mouse x/y

        push  eax
        mov   ax,[BOOT_VAR+0x900c]
        shr   ax,1
        shl   eax,16
        mov   ax,[BOOT_VAR+0x900A]
        shr   ax,1
        mov   [MOUSE_X],eax
        pop   eax

        mov   [BTN_ADDR],dword BUTTON_INFO    ; address of button list

     ;!! IP 04.02.2005:
        mov   byte [DONT_SWITCH], 0 ; change task if possible

        ret

align 4

sys_outport:

    mov   edi,ebx          ; separate flag for read / write
    and   ebx,65535

    mov   ecx,[RESERVED_PORTS]
    test  ecx,ecx
    jne   sopl8
    mov   [esp+36],dword 1
    ret

  sopl8:
    mov   edx,[TASK_BASE]
    mov   edx,[edx+0x4]
    and   ebx,65535
    cld
  sopl1:

    mov   esi,ecx
    shl   esi,4
    add   esi,RESERVED_PORTS
    cmp   edx,[esi+0]
    jne   sopl2
    cmp   ebx,[esi+4]
    jb    sopl2
    cmp   ebx,[esi+8]
    jg    sopl2
    jmp   sopl3

  sopl2:

    dec   ecx
    jnz   sopl1
    mov   [esp+36],dword 1
    ret

  sopl3:

    test  edi,0x80000000 ; read ?
    jnz   sopl4

    mov   dx,bx          ; write
    out   dx,al
    mov   [esp+36],dword 0
    ret

  sopl4:

    mov   dx,bx          ; read
    in    al,dx
    and   eax,0xff
    mov   [esp+36],dword 0
    mov   [esp+24],eax
    ret

display_number:

; eax = print type, al=0 -> ebx is number
;                   al=1 -> ebx is pointer
;                   ah=0 -> display decimal
;                   ah=1 -> display hexadecimal
;                   ah=2 -> display binary
;                   eax bits 16-21 = number of digits to display (0-32)
;                   eax bits 22-31 = reserved
;
; ebx = number or pointer
; ecx = x shl 16 + y
; edx = color
        xor     edi, edi
display_number_force:
     push  eax
     and   eax,0x3fffffff
     cmp   eax,0xffff            ; length > 0 ?
     pop   eax
     jge   cont_displ
     ret
   cont_displ:
     push  eax
     and   eax,0x3fffffff
     cmp   eax,61*0x10000        ; length <= 60 ?
     pop   eax
     jb    cont_displ2
     ret
   cont_displ2:

     pushad

     cmp   al,1                  ; ecx is a pointer ?
     jne   displnl1
     mov   ebp,ebx
     add   ebp,4
     mov   ebp,[ebp+std_application_base_address]
     mov   ebx,[ebx+std_application_base_address]
   displnl1:
     sub   esp,64

     cmp   ah,0                  ; DECIMAL
     jne   no_display_desnum
     shr   eax,16
     and   eax,0xC03f
;     and   eax,0x3f
     push  eax
     and   eax,0x3f
     mov   edi,esp
     add   edi,4+64-1
     mov   ecx,eax
     mov   eax,ebx
     mov   ebx,10
   d_desnum:
     xor   edx,edx
     call  division_64_bits
     div   ebx
     add   dl,48
     mov   [edi],dl
     dec   edi
     loop  d_desnum
     pop   eax
     call  normalize_number
     call  draw_num_text
     add   esp,64
     popad
     ret
   no_display_desnum:

     cmp   ah,0x01               ; HEXADECIMAL
     jne   no_display_hexnum
     shr   eax,16
     and   eax,0xC03f
;     and   eax,0x3f
     push  eax
     and   eax,0x3f
     mov   edi,esp
     add   edi,4+64-1
     mov   ecx,eax
     mov   eax,ebx
     mov   ebx,16
   d_hexnum:
     xor   edx,edx
     call  division_64_bits
     div   ebx
   hexletters = __fdo_hexdigits
     add   edx,hexletters
     mov   dl,[edx]
     mov   [edi],dl
     dec   edi
     loop  d_hexnum
     pop   eax
     call  normalize_number
     call  draw_num_text
     add   esp,64
     popad
     ret
   no_display_hexnum:

     cmp   ah,0x02               ; BINARY
     jne   no_display_binnum
     shr   eax,16
     and   eax,0xC03f
;     and   eax,0x3f
     push  eax
     and   eax,0x3f
     mov   edi,esp
     add   edi,4+64-1
     mov   ecx,eax
     mov   eax,ebx
     mov   ebx,2
   d_binnum:
     xor   edx,edx
     call  division_64_bits
     div   ebx
     add   dl,48
     mov   [edi],dl
     dec   edi
     loop  d_binnum
     pop   eax
     call  normalize_number
     call  draw_num_text
     add   esp,64
     popad
     ret
   no_display_binnum:

     add   esp,64
     popad
     ret

normalize_number:
     test  ah,0x80
     jz   .continue
     mov  ecx,48
     and   eax,0x3f
@@:
     inc   edi
     cmp   [edi],cl
     jne   .continue
     dec   eax
     cmp   eax,1
     ja    @r
     mov   al,1
.continue:
     and   eax,0x3f
     ret

division_64_bits:
     test  [esp+1+4],byte 0x40
     jz   .continue
     push  eax
     mov   eax,ebp
     div   ebx
     mov   ebp,eax
     pop   eax
.continue:
     ret

draw_num_text:
     mov   esi,eax
     mov   edx,64+4
     sub   edx,eax
     add   edx,esp
     mov   ebx,[esp+64+32-8+4]
; add window start x & y
     mov   ecx,[TASK_BASE]

     mov   edi,[CURRENT_TASK]
     shl   edi,8

     mov   eax,[ecx-twdw+WDATA.box.left]
     add   eax,[edi+SLOT_BASE+APPDATA.wnd_clientbox.left]
     shl   eax,16
     add   eax,[ecx-twdw+WDATA.box.top]
     add   eax,[edi+SLOT_BASE+APPDATA.wnd_clientbox.top]
     add   ebx,eax
     mov   ecx,[esp+64+32-12+4]
        and     ecx, not 0x80000000     ; force counted string
        mov     eax, [esp+64+8]         ; background color (if given)
        mov     edi, [esp+64+4]
     jmp   dtext

align 4

sys_setup:

; 1=roland mpu midi base , base io address
; 2=keyboard   1, base kaybap 2, shift keymap, 9 country 1eng 2fi 3ger 4rus
; 3=cd base    1, pri.master 2, pri slave 3 sec master, 4 sec slave
; 5=system language, 1eng 2fi 3ger 4rus
; 7=hd base    1, pri.master 2, pri slave 3 sec master, 4 sec slave
; 8=fat32 partition in hd
; 9
; 10 = sound dma channel
; 11 = enable lba read
; 12 = enable pci access


     mov  [esp+36],dword 0
     cmp  eax,1                      ; MIDI
     jnz  nsyse1
     cmp  ebx,0x100
     jb   nsyse1
     mov  edx,65535
     cmp  edx,ebx
     jb   nsyse1
     mov  [midi_base],bx
     mov  word [mididp],bx
     inc  bx
     mov  word [midisp],bx
     ret

iglobal
midi_base dw 0
endg

   nsyse1:

     cmp  eax,2                      ; KEYBOARD
     jnz  nsyse2
     cmp  ebx,1
     jnz  kbnobase
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  eax,ecx
     mov  ebx,keymap
     mov  ecx,128
     call memmove
     ret
   kbnobase:
     cmp  ebx,2
     jnz  kbnoshift
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  eax,ecx
     mov  ebx,keymap_shift
     mov  ecx,128
     call memmove
     ret
   kbnoshift:
     cmp  ebx,3
     jne  kbnoalt
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  eax,ecx
     mov  ebx,keymap_alt
     mov  ecx,128
     call memmove
     ret
   kbnoalt:
     cmp  ebx,9
     jnz  kbnocountry
     mov  word [keyboard],cx
     ret
   kbnocountry:
     mov  [esp+36],dword 1
     ret
   nsyse2:
     cmp  eax,3                      ; CD
     jnz  nsyse4
     test ebx,ebx
     jz   nosesl
     cmp  ebx, 4
     ja   nosesl
     mov  [cd_base],bl
     cmp  ebx,1
     jnz  noprma
     mov  [cdbase],0x1f0
     mov  [cdid],0xa0
   noprma:
     cmp  ebx,2
     jnz  noprsl
     mov  [cdbase],0x1f0
     mov  [cdid],0xb0
   noprsl:
     cmp  ebx,3
     jnz  nosema
     mov  [cdbase],0x170
     mov  [cdid],0xa0
   nosema:
     cmp  ebx,4
     jnz  nosesl
     mov  [cdbase],0x170
     mov  [cdid],0xb0
   nosesl:
     ret

cd_base db 0

   nsyse4:

     cmp  eax,5                      ; SYSTEM LANGUAGE
     jnz  nsyse5
     mov  [syslang],ebx
     ret
   nsyse5:

     cmp  eax,7                      ; HD BASE
     jne  nsyse7
     test ebx,ebx
     jz   nosethd
     cmp  ebx,4
     ja   nosethd
     mov  [hd_base],bl
     cmp  ebx,1
     jnz  noprmahd
     mov  [hdbase],0x1f0
     mov  [hdid],0x0
     mov  [hdpos],1
;     call set_FAT32_variables
   noprmahd:
     cmp  ebx,2
     jnz  noprslhd
     mov  [hdbase],0x1f0
     mov  [hdid],0x10
     mov  [hdpos],2
;     call set_FAT32_variables
   noprslhd:
     cmp  ebx,3
     jnz  nosemahd
     mov  [hdbase],0x170
     mov  [hdid],0x0
     mov  [hdpos],3
;     call set_FAT32_variables
   nosemahd:
     cmp  ebx,4
     jnz  noseslhd
     mov  [hdbase],0x170
     mov  [hdid],0x10
     mov  [hdpos],4
;     call set_FAT32_variables
   noseslhd:
    call  reserve_hd1
    call  reserve_hd_channel
    call  free_hd_channel
    mov   [hd1_status],0        ; free
   nosethd:
     ret

iglobal
hd_base db 0
endg

nsyse7:

     cmp  eax,8                      ; HD PARTITION
     jne  nsyse8
     mov  [fat32part],ebx
;     call set_FAT32_variables
    call  reserve_hd1
    call  reserve_hd_channel
    call  free_hd_channel
     pusha
     call  choice_necessity_partition_1
     popa
    mov   [hd1_status],0        ; free
     ret

nsyse8:
     cmp  eax,11                     ; ENABLE LBA READ
     jne  no_set_lba_read
     and  ebx,1
     mov  [lba_read_enabled],ebx
     ret

no_set_lba_read:
     cmp  eax,12                     ; ENABLE PCI ACCESS
     jne  no_set_pci_access
     and  ebx,1
     mov  [pci_access_enabled],ebx
     ret
   no_set_pci_access:

;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
include 'vmodeint.inc'
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

sys_setup_err:
     mov  [esp+36],dword -1
     ret

align 4

sys_getsetup:

; 1=roland mpu midi base , base io address
; 2=keyboard   1, base kaybap 2, shift keymap, 9 country 1eng 2fi 3ger 4rus
; 3=cd base    1, pri.master 2, pri slave 3 sec master, 4 sec slave
; 5=system language, 1eng 2fi 3ger 4rus
; 7=hd base    1, pri.master 2, pri slave 3 sec master, 4 sec slave
; 8=fat32 partition in hd
; 9=get hs timer tic

     cmp  eax,1
     jne  ngsyse1
     movzx eax,[midi_base]
     mov  [esp+36],eax
     ret
ngsyse1:

     cmp  eax,2
     jne  ngsyse2
     cmp  ebx,1
     jnz  kbnobaseret
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  ebx,ecx
     mov  eax,keymap
     mov  ecx,128
     call memmove
     ret
kbnobaseret:
     cmp  ebx,2
     jnz  kbnoshiftret
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  ebx,ecx
     mov  eax,keymap_shift
     mov  ecx,128
     call memmove
     ret
kbnoshiftret:
     cmp  ebx,3
     jne  kbnoaltret
     mov  edi,[TASK_BASE]
     add  ecx,[edi+TASKDATA.mem_start]
     mov  ebx,ecx
     mov  eax,keymap_alt
     mov  ecx,128
     call memmove
     ret
kbnoaltret:
     cmp  ebx,9
     jnz  ngsyse2
     movzx eax,word [keyboard]
     mov  [esp+36],eax
     ret
ngsyse2:

         cmp  eax,3
         jnz  ngsyse3
         movzx eax,[cd_base]
         mov  [esp+36],eax
         ret
ngsyse3:
         cmp  eax,5
         jnz  ngsyse5
         mov  eax,[syslang]
         mov  [esp+36],eax
         ret
ngsyse5:
     cmp  eax,7
     jnz  ngsyse7
     movzx eax,[hd_base]
     mov  [esp+36],eax
     ret
ngsyse7:
     cmp  eax,8
     jnz  ngsyse8
     mov eax,[fat32part]
     mov  [esp+36],eax
     ret
ngsyse8:
     cmp  eax,9
     jne  ngsyse9
     mov  eax,[timer_ticks] ;[0xfdf0]
     mov  [esp+36],eax
     ret
ngsyse9:
     cmp  eax,11
     jnz  ngsyse11
     mov eax,[lba_read_enabled]
     mov  [esp+36],eax
     ret
ngsyse11:
     cmp  eax,12
     jnz  ngsyse12
     mov eax,[pci_access_enabled]
     mov  [esp+36],eax
     ret
ngsyse12:
     mov  [esp+36],dword 1
     ret

get_timer_ticks:
    mov eax,[timer_ticks]
    ret

iglobal
align 4
mousefn dd msscreen, mswin, msbutton, msset
        dd app_load_cursor
        dd app_set_cursor
        dd app_delete_cursor
        dd msz
endg

readmousepos:

; eax=0 screen relative
; eax=1 window relative
; eax=2 buttons pressed
; eax=3 set mouse pos   ; reserved
; eax=4 load cursor
; eax=5 set cursor
; eax=6 delete cursor   ; reserved
; eax=7 get mouse_z

           cmp eax, 7
           ja msset
           jmp [mousefn+eax*4]
msscreen:
           mov  eax,[MOUSE_X]
           shl  eax,16
           mov  ax,[MOUSE_Y]
           mov  [esp+36],eax
           ret
mswin:
           mov  eax,[MOUSE_X]
           shl  eax,16
           mov  ax,[MOUSE_Y]
           mov  esi,[TASK_BASE]
           mov  bx, word [esi-twdw+WDATA.box.left]
           shl  ebx,16
           mov  bx, word [esi-twdw+WDATA.box.top]
           sub  eax,ebx

           mov  edi,[CURRENT_TASK]
           shl  edi,8
           sub  ax,word[edi+SLOT_BASE+APPDATA.wnd_clientbox.top]
           rol  eax,16
           sub  ax,word[edi+SLOT_BASE+APPDATA.wnd_clientbox.left]
           rol  eax,16
           mov  [esp+36],eax
           ret
msbutton:
           movzx eax,byte [BTN_DOWN]
           mov  [esp+36],eax
           ret
msz:
           mov   edi, [TASK_COUNT]
           movzx edi, word [WIN_POS + edi*2]
           cmp   edi, [CURRENT_TASK]
           jne   @f
           mov   ax,[MOUSE_SCROLL_H]
           shl   eax,16
           mov   ax,[MOUSE_SCROLL_V]
           mov   [esp+36],eax
           mov   [MOUSE_SCROLL_H],word 0
           mov   [MOUSE_SCROLL_V],word 0
           ret
       @@:
           mov  [esp+36],dword 0
           ret
msset:
           ret

app_load_cursor:
      ;     add ebx, new_app_base
           cmp ebx, OS_BASE
           jae msset
           stdcall load_cursor, ebx, ecx
           mov [esp+36], eax
           ret

app_set_cursor:
           stdcall set_cursor, ebx
           mov [esp+36], eax
           ret

app_delete_cursor:
           stdcall delete_cursor, ebx
           mov [esp+36], eax
           ret

is_input:

   push edx
   mov  dx,word [midisp]
   in   al,dx
   and  al,0x80
   pop  edx
   ret

is_output:

   push edx
   mov  dx,word [midisp]
   in   al,dx
   and  al,0x40
   pop  edx
   ret


get_mpu_in:

   push edx
   mov  dx,word [mididp]
   in   al,dx
   pop  edx
   ret


put_mpu_out:

   push edx
   mov  dx,word [mididp]
   out  dx,al
   pop  edx
   ret


setuart:

 su1:
   call is_output
   cmp  al,0
   jnz  su1
   mov  dx,word [midisp]
   mov  al,0xff
   out  dx,al
 su2:
   mov  dx,word [midisp]
   mov  al,0xff
   out  dx,al
   call is_input
   cmp  al,0
   jnz  su2
   call get_mpu_in
   cmp  al,0xfe
   jnz  su2
 su3:
   call is_output
   cmp  al,0
   jnz  su3
   mov  dx,word [midisp]
   mov  al,0x3f
   out  dx,al

   ret


align 4

sys_midi:

     cmp  [mididp],0
     jnz  sm0
     mov  [esp+36],dword 1
     ret
   sm0:

     cmp  eax,1
     mov  [esp+36],dword 0
     jnz  smn1
     call setuart
     ret
   smn1:

     cmp  eax,2
     jnz  smn2
   sm10:
     call get_mpu_in
     call is_output
     test al,al
     jnz  sm10
     mov  al,bl
     call put_mpu_out
     ret
   smn2:

     ret


detect_devices:
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
;include 'detect/commouse.inc'
;include 'detect/ps2mouse.inc'
;include 'detect/dev_fd.inc'
;include 'detect/dev_hdcd.inc'
;include 'detect/sear_par.inc'
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    ret


sys_end:

     mov ecx, [current_slot]
     mov eax, [ecx+APPDATA.tls_base]
     test eax, eax
     jz @F

     stdcall user_free, eax
@@:

     mov   eax,[TASK_BASE]
     mov   [eax+TASKDATA.state], 3  ; terminate this program

    waitterm:            ; wait here for termination
     mov   ebx,100
     call  delay_hs
     jmp   waitterm

iglobal
align 4
sys_system_table:
        dd      exit_for_anyone         ; 1 = obsolete
        dd      sysfn_terminate         ; 2 = terminate thread
        dd      sysfn_activate          ; 3 = activate window
        dd      sysfn_getidletime       ; 4 = get idle time
        dd      sysfn_getcpuclock       ; 5 = get cpu clock
        dd      sysfn_saveramdisk       ; 6 = save ramdisk
        dd      sysfn_getactive         ; 7 = get active window
        dd      sysfn_sound_flag        ; 8 = get/set sound_flag
        dd      sysfn_shutdown          ; 9 = shutdown with parameter
        dd      sysfn_minimize          ; 10 = minimize window
        dd      sysfn_getdiskinfo       ; 11 = get disk subsystem info
        dd      sysfn_lastkey           ; 12 = get last pressed key
        dd      sysfn_getversion        ; 13 = get kernel version
        dd      sysfn_waitretrace       ; 14 = wait retrace
        dd      sysfn_centermouse       ; 15 = center mouse cursor
        dd      sysfn_getfreemem        ; 16 = get free memory size
        dd      sysfn_getallmem         ; 17 = get total memory size
        dd      sysfn_terminate2        ; 18 = terminate thread using PID
                                        ;                 instead of slot
        dd      sysfn_mouse_acceleration; 19 = set/get mouse acceleration
        dd      sysfn_meminfo           ; 20 = get extended memory info
        dd      sysfn_pid_to_slot       ; 21 = get slot number for pid
        dd      sysfn_min_rest_window   ; 22 = minimize and restore any window
sysfn_num = ($ - sys_system_table)/4
endg

sys_system:
        dec     ebx
        cmp     ebx, sysfn_num
        jae     @f
        jmp     dword [sys_system_table + ebx*4]
@@:
        ret


sysfn_shutdown:          ; 18.9 = system shutdown
     cmp  ecx,1
     jl   exit_for_anyone
     cmp  ecx,4
     jg   exit_for_anyone
     mov  [BOOT_VAR+0x9030],cl

     mov  eax,[TASK_COUNT]
     mov  [SYS_SHUTDOWN],al
     mov  [shutdown_processes],eax
     and  dword [esp+32], 0
 exit_for_anyone:
     ret
  uglobal
   shutdown_processes: dd 0x0
  endg

sysfn_terminate:        ; 18.2 = TERMINATE
     cmp  ecx,2
     jb   noprocessterminate
     mov  edx,[TASK_COUNT]
     cmp  ecx,edx
     ja   noprocessterminate
     mov  eax,[TASK_COUNT]
     shl  ecx,5
     mov  edx,[ecx+CURRENT_TASK+TASKDATA.pid]
     add  ecx,CURRENT_TASK+TASKDATA.state
     cmp  byte [ecx], 9
     jz   noprocessterminate

     ;call MEM_Heap_Lock      ;guarantee that process isn't working with heap
     mov  [ecx],byte 3       ; clear possible i40's
     ;call MEM_Heap_UnLock

     cmp  edx,[application_table_status]    ; clear app table stat
     jne  noatsc
     mov  [application_table_status],0
   noatsc:
   noprocessterminate:
     ret

sysfn_terminate2:
;lock application_table_status mutex
.table_status:
    cli
    cmp    [application_table_status],0
    je     .stf
    sti
    call   change_task
    jmp    .table_status
.stf:
    call   set_application_table_status
    mov    eax,ecx
    call   pid_to_slot
    test   eax,eax
    jz     .not_found
    mov    ecx,eax
    cli
    call   sysfn_terminate
    mov    [application_table_status],0
    sti
    and    dword [esp+32],0
    ret
.not_found:
    mov    [application_table_status],0
    or     dword [esp+32],-1
    ret

sysfn_activate:         ; 18.3 = ACTIVATE WINDOW
     cmp  ecx,2
     jb   .nowindowactivate
     cmp  ecx,[TASK_COUNT]
     ja   .nowindowactivate

     mov   [window_minimize], 2   ; restore window if minimized

     movzx esi, word [WIN_STACK + ecx*2]
     cmp   esi, [TASK_COUNT]
     je    .nowindowactivate ; already active

     mov   edi, ecx
     shl   edi, 5
     add   edi, window_data
     movzx esi, word [WIN_STACK + ecx * 2]
     lea   esi, [WIN_POS + esi * 2]
     call  waredraw
.nowindowactivate:
     ret

sysfn_getidletime:              ; 18.4 = GET IDLETIME
     mov  eax,[idleusesec]
     mov  [esp+32], eax
     ret

sysfn_getcpuclock:              ; 18.5 = GET TSC/SEC
     mov  eax,[CPU_FREQ]
     mov  [esp+32], eax
     ret

;  SAVE ramdisk to /hd/1/menuet.img
;!!!!!!!!!!!!!!!!!!!!!!!!
   include 'blkdev/rdsave.inc'
;!!!!!!!!!!!!!!!!!!!!!!!!
align 4
sysfn_getactive:        ; 18.7 = get active window
     mov  eax, [TASK_COUNT]
   movzx  eax, word [WIN_POS + eax*2]
     mov  [esp+32],eax
     ret

sysfn_sound_flag:       ; 18.8 = get/set sound_flag
;     cmp  ecx,1
     dec  ecx
     jnz  nogetsoundflag
     movzx  eax,byte [sound_flag] ; get sound_flag
     mov  [esp+32],eax
     ret
 nogetsoundflag:
;     cmp  ecx,2
     dec  ecx
     jnz  nosoundflag
     xor  byte [sound_flag], 1
 nosoundflag:
     ret

sysfn_minimize:         ; 18.10 = minimize window
     mov   [window_minimize],1
     ret
align 4
sysfn_getdiskinfo:      ; 18.11 = get disk info table
;     cmp  ecx,1
     dec  ecx
     jnz  full_table
  small_table:
     call for_all_tables
     mov ecx,10
     cld
     rep movsb
     ret
   for_all_tables:
     mov edi,edx
     mov esi,DRIVE_DATA
     ret
  full_table:
;     cmp  ecx,2
     dec  ecx
     jnz  exit_for_anyone
     call for_all_tables
     mov ecx,16384
     cld
     rep movsd
     ret

sysfn_lastkey:          ; 18.12 = return 0 (backward compatibility)
        and     dword [esp+32], 0
        ret

sysfn_getversion:       ; 18.13 = get kernel ID and version
     mov edi,ebx
     mov esi,version_inf
     mov ecx,version_end-version_inf
     rep movsb
     ret

sysfn_waitretrace:     ; 18.14 = sys wait retrace
     ;wait retrace functions
 sys_wait_retrace:
     mov edx,0x3da
 WaitRetrace_loop:
     in al,dx
     test al,1000b
     jz WaitRetrace_loop
     and [esp+32],dword 0
     ret

align 4
sysfn_centermouse:      ; 18.15 = mouse centered
; removed here by <Lrz>
;     call  mouse_centered
;* mouse centered - start code- Mario79
;mouse_centered:
;        push  eax
        mov   eax,[Screen_Max_X]
        shr   eax,1
        mov   [MOUSE_X],ax
        mov   eax,[Screen_Max_Y]
        shr   eax,1
        mov   [MOUSE_Y],ax
;        ret
;* mouse centered - end code- Mario79
	xor   eax,eax
        and   [esp+32],eax
;        pop   eax

     ret
align 4
sysfn_mouse_acceleration: ; 18.19 = set/get mouse features
     test ecx,ecx  ; get mouse speed factor
     jnz  .set_mouse_acceleration
     xor  eax,eax
     mov  ax,[mouse_speed_factor]
     mov  [esp+32],eax
     ret
 .set_mouse_acceleration:
;     cmp  ecx,1  ; set mouse speed factor
     dec  ecx
     jnz  .get_mouse_delay
     mov  [mouse_speed_factor],dx
     ret
 .get_mouse_delay:
;     cmp  ecx,2  ; get mouse delay
     dec  ecx
     jnz  .set_mouse_delay
     mov  eax,[mouse_delay]
     mov  [esp+32],eax
     ret
 .set_mouse_delay:
;     cmp  ecx,3  ; set mouse delay
     dec  ecx
     jnz  .set_pointer_position
     mov  [mouse_delay],edx
     ret
 .set_pointer_position:
;     cmp  ecx,4  ; set mouse pointer position
     dec   ecx
     jnz  .set_mouse_button
     mov   [MOUSE_Y],dx    ;y
     ror   edx,16
     mov   [MOUSE_X],dx    ;x
     rol   edx,16
     ret
 .set_mouse_button:
;     cmp   ecx,5  ; set mouse button features
     dec   ecx
     jnz  .end
     mov   [BTN_DOWN],dl
     mov   [mouse_active],1
 .end:
     ret

sysfn_getfreemem:
     mov eax, [pg_data.pages_free]
     shl eax, 2
     mov [esp+32],eax
     ret

sysfn_getallmem:
     mov  eax,[MEM_AMOUNT]
     shr eax, 10
     mov  [esp+32],eax
     ret

; // Alver, 2007-22-08 // {
sysfn_pid_to_slot:
     mov   eax, ecx
     call  pid_to_slot
     mov   [esp+32], eax
     ret

sysfn_min_rest_window:
     pushad
     mov   eax, edx      ; ebx - operating
     shr   ecx, 1
     jnc    @f
     call  pid_to_slot
@@:
     or    eax, eax      ; eax - number of slot
     jz    .error
     cmp   eax, 255         ; varify maximal slot number
     ja    .error
     movzx eax, word [WIN_STACK + eax*2]
     shr   ecx, 1
     jc    .restore
 ; .minimize:
     call  minimize_window
     jmp   .exit
.restore:
     call  restore_minimized_window
.exit:
     popad
     xor   eax, eax
     mov   [esp+32], eax
     ret
.error:
     popad
     xor   eax, eax
     dec   eax
     mov   [esp+32], eax
     ret
; } \\ Alver, 2007-22-08 \\

uglobal
;// mike.dld, 2006-29-01 [
screen_workarea RECT
;// mike.dld, 2006-29-01 ]
window_minimize db 0
sound_flag      db 0
endg

iglobal
version_inf:
  db 0,7,5,0  ; version 0.7.5.0
  db UID_KOLIBRI
  dd __REV__
version_end:
endg

UID_NONE=0
UID_MENUETOS=1   ;official
UID_KOLIBRI=2    ;russian

sys_cachetodiskette:
        cmp     ebx, 1
        jne     .no_floppy_a_save
        mov     [flp_number], 1
        jmp     .save_image_on_floppy
.no_floppy_a_save:
        cmp     ebx, 2
        jne     .no_floppy_b_save
        mov     [flp_number], 2
.save_image_on_floppy:
        call    save_image
        mov     [esp + 32], dword 0
        cmp     [FDC_Status], 0
        je      .yes_floppy_save
.no_floppy_b_save:
        mov     [esp + 32], dword 1
.yes_floppy_save:
        ret

uglobal
;  bgrchanged  dd  0x0
align 4
bgrlockpid dd 0
bgrlock db 0
endg

sys_background:

    cmp   ebx,1                            ; BACKGROUND SIZE
    jnz   nosb1
    test  ecx,ecx
;    cmp   ecx,0
    jz    sbgrr
    test  edx,edx
;    cmp   edx,0
    jz    sbgrr
@@:
;;Maxis use atomic bts for mutexes  4.4.2009
        bts     dword [bgrlock], 0
        jnc     @f
        call    change_task
        jmp     @b
@@:
    mov   [BgrDataWidth],ecx
    mov   [BgrDataHeight],edx
;    mov   [bgrchanged],1

    pushad
; return memory for old background
        mov     eax, [img_background]
        cmp     eax, static_background_data
        jz      @f
        stdcall kernel_free, eax
@@:
; calculate RAW size
    xor  eax,eax
    inc  eax
    cmp  [BgrDataWidth],eax
    jae   @f
    mov [BgrDataWidth],eax
@@:
    cmp  [BgrDataHeight],eax
    jae   @f
    mov [BgrDataHeight],eax
@@:
    mov  eax,[BgrDataWidth]
    imul eax,[BgrDataHeight]
    lea  eax,[eax*3]
    mov  [mem_BACKGROUND],eax
; get memory for new background
    stdcall kernel_alloc, eax
    test eax, eax
    jz .memfailed
    mov [img_background], eax
    jmp .exit
.memfailed:
; revert to static monotone data
        mov     [img_background], static_background_data
        xor     eax, eax
        inc     eax
        mov     [BgrDataWidth], eax
        mov     [BgrDataHeight], eax
        mov     [mem_BACKGROUND], 4
.exit:
    popad
        mov     [bgrlock], 0

  sbgrr:
    ret

nosb1:

    cmp   ebx,2                            ; SET PIXEL
    jnz   nosb2

    mov   eax, [img_background]
    test  ecx, ecx
    jz    @f
    cmp   eax, static_background_data
    jz    .ret
@@:
    mov ebx, [mem_BACKGROUND]
    add ebx, 4095
    and ebx, -4096
    sub ebx, 4
    cmp   ecx, ebx
    ja   .ret

    mov   ebx,[eax+ecx]
    and   ebx,0xFF000000 ;255*256*256*256
    and   edx,0x00FFFFFF ;255*256*256+255*256+255
    add   edx,ebx
    mov   [eax+ecx],edx
.ret:
    ret
nosb2:

    cmp   ebx,3                            ; DRAW BACKGROUND
    jnz   nosb3
draw_background_temp:
;    cmp   [bgrchanged],1 ;0
;    je    nosb31
;draw_background_temp:
;    mov   [bgrchanged],1 ;0
    mov    [background_defined], 1
    call  force_redraw_background
    mov    [REDRAW_BACKGROUND], byte 2
   nosb31:
    ret
  nosb3:

    cmp   ebx,4                            ; TILED / STRETCHED
    jnz   nosb4
    cmp   ecx,[BgrDrawMode]
    je    nosb41
    mov   [BgrDrawMode],ecx
;    mov   [bgrchanged],1
   nosb41:
    ret
  nosb4:

    cmp   ebx,5                            ; BLOCK MOVE TO BGR
    jnz   nosb5
    cmp   [img_background], static_background_data
    jnz   @f
    test  edx, edx
    jnz   .fin
    cmp   esi, 4
    ja    .fin
  @@:
  ; bughere
    mov   eax, ecx
    mov   ebx, edx
    add   ebx, [img_background]   ;IMG_BACKGROUND
    mov   ecx, esi
    call  memmove
  .fin:
    ret
  nosb5:

        cmp     ebx, 6
        jnz     nosb6
;;Maxis use atomic bts for mutex 4.4.2009
@@:
        bts     dword [bgrlock], 0
        jnc     @f
        call    change_task
        jmp     @b
@@:
        mov     eax, [CURRENT_TASK]
        mov     [bgrlockpid], eax
        cmp     [img_background], static_background_data
        jz      .nomem
        stdcall user_alloc, [mem_BACKGROUND]
        mov     [esp+32], eax
        test    eax, eax
        jz      .nomem
        mov     ebx, eax
        shr     ebx, 12
        or      dword [page_tabs+(ebx-1)*4], DONT_FREE_BLOCK
        mov     esi, [img_background]
        shr     esi, 12
        mov     ecx, [mem_BACKGROUND]
        add     ecx, 0xFFF
        shr     ecx, 12
.z:
        mov     eax, [page_tabs+ebx*4]
        test    al, 1
        jz      @f
        call    free_page
@@:
        mov     eax, [page_tabs+esi*4]
        or      al, PG_UW
        mov     [page_tabs+ebx*4], eax
        mov     eax, ebx
        shl     eax, 12
        invlpg  [eax]
        inc     ebx
        inc     esi
        loop    .z
        ret
.nomem:
        and     [bgrlockpid], 0
        mov     [bgrlock], 0
nosb6:
        cmp     ebx, 7
        jnz     nosb7
        cmp     [bgrlock], 0
        jz      .err
        mov     eax, [CURRENT_TASK]
        cmp     [bgrlockpid], eax
        jnz     .err
        mov     eax, ecx
        mov     ebx, ecx
        shr     eax, 12
        mov     ecx, [page_tabs+(eax-1)*4]
        test    cl, USED_BLOCK+DONT_FREE_BLOCK
        jz      .err
        jnp     .err
        push    eax
        shr     ecx, 12
@@:
        and     dword [page_tabs+eax*4], 0
        mov     edx, eax
        shl     edx, 12
        push eax
        invlpg  [edx]
        pop eax
        inc     eax
        loop    @b
        pop     eax
        and     dword [page_tabs+(eax-1)*4], not DONT_FREE_BLOCK
        stdcall user_free, ebx
        mov     [esp+32], eax
        and     [bgrlockpid], 0
        mov     [bgrlock], 0
        ret
.err:
        and     dword [esp+32], 0
        ret

nosb7:
    ret

force_redraw_background:
    mov   [draw_data+32 + RECT.left],dword 0
    mov   [draw_data+32 + RECT.top],dword 0
    push  eax ebx
    mov   eax,[Screen_Max_X]
    mov   ebx,[Screen_Max_Y]
    mov   [draw_data+32 + RECT.right],eax
    mov   [draw_data+32 + RECT.bottom],ebx
    pop   ebx eax
    mov   byte [REDRAW_BACKGROUND], 1
    ret

align 4

sys_getbackground:

    cmp   eax,1                                  ; SIZE
    jnz   nogb1
    mov   eax,[BgrDataWidth]
    shl   eax,16
    mov   ax,[BgrDataHeight]
    mov   [esp+36],eax
    ret

nogb1:

    cmp   eax,2                                  ; PIXEL
    jnz   nogb2

        mov     eax, [img_background]
        test    ebx, ebx
        jz      @f
        cmp     eax, static_background_data
        jz      .ret
@@:
    mov ecx, [mem_BACKGROUND]
    add ecx, 4095
    and ecx, -4096
    sub ecx, 4
    cmp ebx, ecx
    ja  .ret

    mov   eax,[ebx+eax]

    and   eax, 0xFFFFFF
    mov   [esp+36],eax
.ret:
    ret
  nogb2:

    cmp   eax,4                                  ; TILED / STRETCHED
    jnz   nogb4
    mov   eax,[BgrDrawMode]
  nogb4:
    mov   [esp+36],eax
    ret


align 4

sys_getkey:
        mov     [esp + 32],dword 1
        ; test main buffer
        mov     ebx, [CURRENT_TASK]                          ; TOP OF WINDOW STACK
        movzx   ecx, word [WIN_STACK + ebx * 2]
        mov     edx, [TASK_COUNT]
        cmp     ecx, edx
        jne     .finish
        cmp     [KEY_COUNT], byte 0
        je      .finish
        movzx   eax, byte [KEY_BUFF]
        shl     eax, 8
        push    eax
        dec     byte [KEY_COUNT]
        and     byte [KEY_COUNT], 127
        movzx   ecx, byte [KEY_COUNT]
        add     ecx, 2
        mov     eax, KEY_BUFF + 1
        mov     ebx, KEY_BUFF
        call    memmove
        pop     eax
.ret_eax:
        mov     [esp + 32], eax
        ret
.finish:
; test hotkeys buffer
        mov     ecx, hotkey_buffer
@@:
        cmp     [ecx], ebx
        jz      .found
        add     ecx, 8
        cmp     ecx, hotkey_buffer + 120 * 8
        jb      @b
        ret
.found:
        mov     ax, [ecx + 6]
        shl     eax, 16
        mov     ah, [ecx + 4]
        mov     al, 2
        and     dword [ecx + 4], 0
        and     dword [ecx], 0
        jmp     .ret_eax

align 4

sys_getbutton:

        mov     ebx, [CURRENT_TASK]                         ; TOP OF WINDOW STACK
        mov     [esp + 32], dword 1
        movzx   ecx, word [WIN_STACK + ebx * 2]
        mov     edx, [TASK_COUNT] ; less than 256 processes
        cmp     ecx, edx
        jne     .exit
        movzx   eax, byte [BTN_COUNT]
        test    eax, eax
        jz      .exit
        mov     eax, [BTN_BUFF]
        shl     eax, 8
; // Alver 22.06.2008 // {
        mov       al, byte [btn_down_determ]
        and       al,0xFE                                       ; delete left button bit
; } \\ Alver \\
        mov     [BTN_COUNT], byte 0
        mov     [esp + 32], eax
.exit:
        ret


align 4

sys_cpuusage:

;  RETURN:
;
;  +00 dword     process cpu usage
;  +04  word     position in windowing stack
;  +06  word     windowing stack value at current position (cpu nro)
;  +10 12 bytes  name
;  +22 dword     start in mem
;  +26 dword     used mem
;  +30 dword     PID , process idenfification number
;

    cmp  ecx,-1         ; who am I ?
    jne  .no_who_am_i
    mov  ecx,[CURRENT_TASK]
  .no_who_am_i:
        cmp     ecx, max_processes
        ja      .nofillbuf

; +4: word: position of the window of thread in the window stack
        mov     ax, [WIN_STACK + ecx * 2]
        mov     [ebx+4], ax
; +6: word: number of the thread slot, which window has in the window stack
;           position ecx (has no relation to the specific thread)
        mov     ax, [WIN_POS + ecx * 2]
        mov     [ebx+6], ax

        shl     ecx, 5

; +0: dword: memory usage
        mov     eax, [ecx+CURRENT_TASK+TASKDATA.cpu_usage]
        mov     [ebx], eax
; +10: 11 bytes: name of the process
        push    ecx
        lea     eax, [ecx*8+SLOT_BASE+APPDATA.app_name]
        add     ebx, 10
        mov     ecx, 11
        call    memmove
        pop     ecx

; +22: address of the process in memory
; +26: size of used memory - 1
        push    edi
        lea     edi, [ebx+12]
        xor     eax, eax
        mov     edx, 0x100000*16
        cmp     ecx, 1 shl 5
        je      .os_mem
        mov     edx, [SLOT_BASE+ecx*8+APPDATA.mem_size]
        mov     eax, std_application_base_address
.os_mem:
        stosd
        lea     eax, [edx-1]
        stosd

; +30: PID/TID
        mov     eax, [ecx+CURRENT_TASK+TASKDATA.pid]
        stosd

    ; window position and size
        push    esi
        lea     esi, [ecx + window_data + WDATA.box]
        movsd
        movsd
        movsd
        movsd

    ; Process state (+50)
        mov     eax, dword [ecx+CURRENT_TASK+TASKDATA.state]
        stosd

    ; Window client area box
        lea     esi, [ecx*8 + SLOT_BASE + APPDATA.wnd_clientbox]
        movsd
        movsd
        movsd
        movsd

    ; Window state
        mov     al, [ecx+window_data+WDATA.fl_wstate]
        stosb

        pop     esi
        pop     edi

.nofillbuf:
    ; return number of processes

    mov    eax,[TASK_COUNT]
    mov    [esp+32],eax
    ret

align 4
sys_clock:
        cli
  ; Mikhail Lisovin  xx Jan 2005
  @@:   mov   al, 10
        out   0x70, al
        in    al, 0x71
        test  al, al
        jns   @f
        mov   esi, 1
        call  delay_ms
        jmp   @b
  @@:
  ; end Lisovin's fix

        xor   al,al           ; seconds
        out   0x70,al
        in    al,0x71
        movzx ecx,al
        mov   al,02           ; minutes
        shl   ecx,16
        out   0x70,al
        in    al,0x71
        movzx edx,al
        mov   al,04           ; hours
        shl   edx,8
        out   0x70,al
        in    al,0x71
        add   ecx,edx
        movzx edx,al
        add   ecx,edx
        sti
        mov     [esp + 32], ecx
        ret


align 4

sys_date:

        cli
  @@:   mov   al, 10
        out   0x70, al
        in    al, 0x71
        test  al, al
        jns   @f
        mov   esi, 1
        call  delay_ms
        jmp   @b
  @@:

        mov     ch,0
        mov     al,7            ; date
        out     0x70,al
        in      al,0x71
        mov     cl,al
        mov     al,8            ; month
        shl     ecx,16
        out     0x70,al
        in      al,0x71
        mov     ch,al
        mov     al,9            ; year
        out     0x70,al
        in      al,0x71
        mov     cl,al
        sti
        mov     [esp+32], ecx
        ret


; redraw status

sys_redrawstat:
        cmp     ebx, 1
        jne     no_widgets_away
        ; buttons away
        mov     ecx,[CURRENT_TASK]
  sys_newba2:
        mov     edi,[BTN_ADDR]
        cmp     [edi], dword 0  ; empty button list ?
        je      end_of_buttons_away
        movzx   ebx, word [edi]
        inc     ebx
        mov     eax,edi
  sys_newba:
        dec     ebx
        jz      end_of_buttons_away

        add     eax, 0x10
        cmp     cx, [eax]
        jnz     sys_newba

        push    eax ebx ecx
        mov     ecx,ebx
        inc     ecx
        shl     ecx, 4
        mov     ebx, eax
        add     eax, 0x10
        call    memmove
        dec     dword [edi]
        pop     ecx ebx eax

        jmp     sys_newba2

  end_of_buttons_away:

        ret

  no_widgets_away:

        cmp     ebx, 2
        jnz     srl1

        mov     edx, [TASK_BASE]      ; return whole screen draw area for this app
        add     edx, draw_data - CURRENT_TASK
        mov     [edx + RECT.left], 0
        mov     [edx + RECT.top], 0
        mov     eax, [Screen_Max_X]
        mov     [edx + RECT.right], eax
        mov     eax, [Screen_Max_Y]
        mov     [edx + RECT.bottom], eax

        mov     edi, [TASK_BASE]
        or      [edi - twdw + WDATA.fl_wdrawn], 1   ; no new position & buttons from app
        call    sys_window_mouse
        ret

  srl1:
        ret


sys_drawwindow:

    mov   eax,edx
    shr   eax,16+8
    and   eax,15

;    cmp   eax,0   ; type I    - original style
    jne   nosyswI
    inc   [mouse_pause]
    call  [disable_mouse]
    call  sys_set_window
    call  [disable_mouse]
    call  drawwindow_I
    ;dec   [mouse_pause]
    ;call   [draw_pointer]
    ;ret
    jmp   draw_window_caption.2
  nosyswI:

    cmp   al,1    ; type II   - only reserve area, no draw
    jne   nosyswII
    inc   [mouse_pause]
    call  [disable_mouse]
    call  sys_set_window
    call  [disable_mouse]
    call  sys_window_mouse
    dec   [mouse_pause]
    call   [draw_pointer]
    ret
  nosyswII:

    cmp   al,2    ; type III  - new style
    jne   nosyswIII
    inc   [mouse_pause]
    call  [disable_mouse]
    call  sys_set_window
    call  [disable_mouse]
    call  drawwindow_III
    ;dec   [mouse_pause]
    ;call   [draw_pointer]
    ;ret
    jmp   draw_window_caption.2
  nosyswIII:

    cmp   al,3    ; type IV - skinned window
    je    draw_skin_window
    cmp   al,4    ; type V - skinned window not sized! {not_sized_skin_window}
    jne   nosyswV
  draw_skin_window:

    inc   [mouse_pause]
    call  [disable_mouse]
    call  sys_set_window
    call  [disable_mouse]
    mov   eax, [TASK_COUNT]
    movzx eax, word [WIN_POS + eax*2]
    cmp   eax, [CURRENT_TASK]
    setz  al
    movzx eax, al
    push  eax
    call  drawwindow_IV
    ;dec   [mouse_pause]
    ;call   [draw_pointer]
    ;ret
    jmp   draw_window_caption.2
  nosyswV:

    ret


draw_window_caption:
        inc     [mouse_pause]
        call    [disable_mouse]

        xor     eax,eax
        mov     edx,[TASK_COUNT]
        movzx   edx,word[WIN_POS+edx*2]
        cmp     edx,[CURRENT_TASK]
        jne     @f
        inc     eax
    @@: mov     edx,[CURRENT_TASK]
        shl     edx,5
        add     edx,window_data
        movzx   ebx,[edx+WDATA.fl_wstyle]
        and     bl,0x0F
        cmp     bl,3
        je      .draw_caption_style_3           ;{for 3 and 4 style write caption}
        cmp     bl,4
        je      .draw_caption_style_3

        jmp     .not_style_3
  .draw_caption_style_3:

        push    edx
        call    drawwindow_IV_caption
        add     esp,4
        jmp     .2

  .not_style_3:
        cmp     bl,2
        jne     .not_style_2

        call    drawwindow_III_caption
        jmp     .2

  .not_style_2:
        cmp     bl,0
        jne     .2

        call    drawwindow_I_caption

;--------------------------------------------------------------
  .2:   ;jmp     @f
        mov     edi,[CURRENT_TASK]
        shl     edi,5
        test    [edi+window_data+WDATA.fl_wstyle],WSTYLE_HASCAPTION
        jz      @f
        mov     edx,[edi*8+SLOT_BASE+APPDATA.wnd_caption]
        or      edx,edx
        jz      @f

        movzx   eax,[edi+window_data+WDATA.fl_wstyle]
        and     al,0x0F
        cmp     al,3
        je      .skinned
        cmp     al,4
        je      .skinned

        jmp     .not_skinned
  .skinned:
        mov     ebp,[edi+window_data+WDATA.box.left-2]
        mov     bp,word[edi+window_data+WDATA.box.top]
        movzx   eax,word[edi+window_data+WDATA.box.width]
        sub     ax,[_skinmargins.left]
        sub     ax,[_skinmargins.right]
        push    edx
        cwde
        cdq
        mov     ebx,6
        idiv    ebx
        pop     edx
        or      eax,eax
        js      @f
        mov     esi,eax
        mov     ebx,dword[_skinmargins.left-2]
        mov     bx,word[_skinh]
        sub     bx,[_skinmargins.bottom]
        sub     bx,[_skinmargins.top]
        sar     bx,1
        adc     bx,0
        add     bx,[_skinmargins.top]
        add     bx,-3
        add     ebx,ebp
        jmp     .dodraw

  .not_skinned:
        cmp     al,1
        je      @f

        mov     ebp,[edi+window_data+WDATA.box.left-2]
        mov     bp,word[edi+window_data+WDATA.box.top]
        movzx   eax,word[edi+window_data+WDATA.box.width]
        sub     eax,16
        push    edx
        cwde
        cdq
        mov     ebx,6
        idiv    ebx
        pop     edx
        or      eax,eax
        js      @f
        mov     esi,eax
        mov     ebx,0x00080007
        add     ebx,ebp
.dodraw:
        mov     ecx,[common_colours+16];0x00FFFFFF
        or      ecx, 0x80000000
        xor     edi,edi
; // Alver 22.06.2008 // {
;       call    dtext
        call dtext_asciiz_esi
; } \\ Alver \\

    @@:
;--------------------------------------------------------------
        dec     [mouse_pause]
        call    [draw_pointer]
        ret

iglobal
align 4
window_topleft dd \
  1, 21,\               ;type 0
  0,  0,\       ;type 1
  5, 20,\       ;type 2
  5,  ?,\       ;type 3 {set by skin}
  5,  ?         ;type 4 {set by skin}
endg

set_window_clientbox:
        push    eax ecx edi

        mov     eax,[_skinh]
        mov     [window_topleft+4*7],eax
        mov     [window_topleft+4*9],eax

        mov     ecx,edi
        sub     edi,window_data
        shl     edi,3
        test    [ecx+WDATA.fl_wstyle],WSTYLE_CLIENTRELATIVE
        jz      @f

        movzx   eax,[ecx+WDATA.fl_wstyle]
        and     eax,0x0F
        mov     eax,[eax*8+window_topleft+0]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.left],eax
        shl     eax,1
        neg     eax
        add     eax,[ecx+WDATA.box.width]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.width],eax

        movzx   eax,[ecx+WDATA.fl_wstyle]
        and     eax,0x0F
        push    [eax*8+window_topleft+0]
        mov     eax,[eax*8+window_topleft+4]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.top],eax
        neg     eax
        sub     eax,[esp]
        add     eax,[ecx+WDATA.box.height]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.height],eax
        add     esp,4

        pop     edi ecx eax
        ret
    @@:
        xor     eax,eax
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.left],eax
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.top],eax
        mov     eax,[ecx+WDATA.box.width]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.width],eax
        mov     eax,[ecx+WDATA.box.height]
        mov     [edi+SLOT_BASE+APPDATA.wnd_clientbox.height],eax

        pop     edi ecx eax
        ret

sys_set_window:

    mov   eax,[CURRENT_TASK]
    shl   eax,5
    add   eax,window_data

    ; colors
    mov   [eax+WDATA.cl_workarea],edx
    mov   [eax+WDATA.cl_titlebar],esi
    mov   [eax+WDATA.cl_frames],edi

    mov   edi, eax

    ; check flag (?)
    test  [edi+WDATA.fl_wdrawn],1
    jnz   newd

    mov   eax,[timer_ticks] ;[0xfdf0]
    add   eax,100
    mov   [new_window_starting],eax

    movsx eax,bx
    mov   [edi+WDATA.box.width],eax
    movsx eax,cx
    mov   [edi+WDATA.box.height],eax
    sar   ebx,16
    sar   ecx,16
    mov   [edi+WDATA.box.left],ebx
    mov   [edi+WDATA.box.top],ecx

    call  check_window_position

    push  ecx esi edi               ; save for window fullscreen/resize
    ;mov   esi,edi

        mov     cl, [edi+WDATA.fl_wstyle]
        mov     eax, [edi+WDATA.cl_frames]

    sub   edi,window_data
    shl   edi,3
    add   edi,SLOT_BASE

        and     cl,0x0F
        mov     [edi+APPDATA.wnd_caption],0
        cmp     cl,3
        je      set_APPDATA_wnd_caption
        cmp     cl,4                                                            ; {SPraid.simba}
        je      set_APPDATA_wnd_caption

        jmp     @f
    set_APPDATA_wnd_caption:
        mov     [edi+APPDATA.wnd_caption],eax
    @@: mov     esi,[esp+0]

    add   edi, APPDATA.saved_box
        movsd
        movsd
        movsd
        movsd
    pop   edi esi ecx

        mov     esi, [CURRENT_TASK]
        movzx   esi, word [WIN_STACK+esi*2]
        lea     esi, [WIN_POS+esi*2]
        call    waredraw

;;;    mov   ebx, 1
;;;    call  delay_hs
    mov   eax, [edi+WDATA.box.left]
    mov   ebx, [edi+WDATA.box.top]
    mov   ecx, [edi+WDATA.box.width]
    mov   edx, [edi+WDATA.box.height]
    add   ecx, eax
    add   edx, ebx
    call  calculatescreen

    mov   [KEY_COUNT],byte 0           ; empty keyboard buffer
    mov   [BTN_COUNT],byte 0           ; empty button buffer

  newd:
    call  set_window_clientbox

    mov   [edi+WDATA.fl_redraw],byte 0   ; no redraw
    mov   edx,edi

    ret

syscall_windowsettings:

  .set_window_caption:
        dec     eax     ; subfunction #1 - set window caption
        jnz     .get_window_caption

        ; NOTE: only window owner thread can set its caption,
        ;       so there's no parameter for PID/TID

        mov     edi,[CURRENT_TASK]
        shl     edi,5

        ; have to check if caption is within application memory limit
        ; check is trivial, and if application resizes its memory,
        ;   caption still can become over bounds
; diamond, 31.10.2006: check removed because with new memory manager
; there can be valid data after APPDATA.mem_size bound
;        mov     ecx,[edi*8+SLOT_BASE+APPDATA.mem_size]
;        add     ecx,255 ; max caption length
;        cmp     ebx,ecx
;        ja      .exit_fail

        mov     [edi*8+SLOT_BASE+APPDATA.wnd_caption],ebx
        or      [edi+window_data+WDATA.fl_wstyle],WSTYLE_HASCAPTION

        call    draw_window_caption

        xor     eax,eax ; eax = 0 (success)
        ret

  .get_window_caption:
        dec     eax     ; subfunction #2 - get window caption
        jnz     .exit_fail

        ; not implemented yet

  .exit_fail:
        xor     eax,eax
        inc     eax     ; eax = 1 (fail)
        ret


sys_window_move:

        mov     edi,[CURRENT_TASK]
        shl     edi,5
        add     edi,window_data

        test    [edi+WDATA.fl_wstate],WSTATE_MAXIMIZED
        jnz     .window_move_return

        push    dword [edi + WDATA.box.left]  ; save old coordinates
        push    dword [edi + WDATA.box.top]
        push    dword [edi + WDATA.box.width]
        push    dword [edi + WDATA.box.height]

        cmp   eax,-1                  ; set new position and size
        je    .no_x_reposition
        mov     [edi + WDATA.box.left], eax
      .no_x_reposition:
        cmp   ebx,-1
        je    .no_y_reposition
        mov     [edi + WDATA.box.top], ebx
      .no_y_reposition:

        test    [edi+WDATA.fl_wstate],WSTATE_ROLLEDUP
        jnz     .no_y_resizing

        cmp   ecx,-1
        je    .no_x_resizing
        mov     [edi + WDATA.box.width], ecx
      .no_x_resizing:
        cmp   edx,-1
        je    .no_y_resizing
        mov     [edi + WDATA.box.height], edx
      .no_y_resizing:

        call  check_window_position
        call  set_window_clientbox

        pushad                       ; save for window fullscreen/resize
        mov   esi,edi
        sub   edi,window_data
        shr   edi,5
        shl   edi,8
        add   edi, SLOT_BASE + APPDATA.saved_box
        mov   ecx,4
        cld
        rep   movsd
        popad

        pushad                       ; calculcate screen at new position
        mov   eax, [edi + WDATA.box.left]
        mov   ebx, [edi + WDATA.box.top]
        mov   ecx, [edi + WDATA.box.width]
        mov   edx, [edi + WDATA.box.height]
        add   ecx,eax
        add   edx,ebx

        call  calculatescreen
        popad

        pop   edx                   ; calculcate screen at old position
        pop   ecx
        pop   ebx
        pop   eax
        add   ecx,eax
        add   edx,ebx
        mov   [dlx],eax             ; save for drawlimits
        mov   [dly],ebx
        mov   [dlxe],ecx
        mov   [dlye],edx
        call  calculatescreen

        mov   [edi + WDATA.fl_redraw], 1 ; flag the process as redraw

        mov   eax,edi               ; redraw screen at old position
        xor   esi,esi
        call  redrawscreen

        mov   [DONT_DRAW_MOUSE],byte 0 ; mouse pointer
        mov   [MOUSE_BACKGROUND],byte 0 ; no mouse under
        mov   [MOUSE_DOWN],byte 0 ; react to mouse up/down

        call  [draw_pointer]

        mov   [window_move_pr],0

      .window_move_return:

        ret

uglobal
  window_move_pr   dd  0x0
  window_move_eax  dd  0x0
  window_move_ebx  dd  0x0
  window_move_ecx  dd  0x0
  window_move_edx  dd  0x0
endg

;ok - 100% work
;nt - not tested
;---------------------------------------------------------------------------------------------
;eax
;0 - task switch counter. Ret switch counter in eax. Block. ok.
;1 - change task. Ret nothing. Block. ok.
;2 - performance control
; ebx
; 0 - enable or disable (inversion) PCE flag on CR4 for rdmpc in user mode.
; returned new cr4 in eax. Ret cr4 in eax. Block. ok.
; 1 - is cache enabled. Ret cr0 in eax if enabled else zero in eax. Block. ok.
; 2 - enable cache. Ret 1 in eax. Ret nothing. Block. ok.
; 3 - disable cache. Ret 0 in eax. Ret nothing. Block. ok.
;eax
;3 - rdmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok.
;4 - wrmsr. Counter in edx. (edx:eax) [esi:edi, edx] => [edx:esi, ecx]. Ret in ebx:eax. Block. ok.
;---------------------------------------------------------------------------------------------
sys_sheduler: ;noname & halyavin
    cmp eax,0
    je shed_counter
    cmp eax,2
    je perf_control
    cmp eax,3
    je rdmsr_instr
    cmp eax,4
    je wrmsr_instr
    cmp eax,1
    jne not_supported
    call change_task ;delay,0
ret
shed_counter:
    mov eax,[context_counter]
    mov [esp+36],eax
not_supported:
ret
perf_control:
    inc eax ;now eax=3
    cmp ebx,eax
    je cache_disable
    dec eax
    cmp ebx,eax
    je cache_enable
    dec eax
    cmp ebx,eax
    je is_cache_enabled
    dec eax
    cmp ebx,eax
    je modify_pce
ret

rdmsr_instr:
;now counter in ecx
;(edx:eax) esi:edi => edx:esi
mov eax,esi
rdmsr
mov [esp+36],eax
mov [esp+24],edx ;ret in ebx?
ret

wrmsr_instr:
;now counter in ecx
;(edx:eax) esi:edi => edx:esi
        ; Fast Call MSR can't be destroy
        ; <20><> MSR_AMD_EFER <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20>.<2E>. <20> <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>
        ; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        cmp     ecx, MSR_SYSENTER_CS
        je      @f
        cmp     ecx, MSR_SYSENTER_ESP
        je      @f
        cmp     ecx, MSR_SYSENTER_EIP
        je      @f
        cmp     ecx, MSR_AMD_STAR
        je      @f

        mov     eax, esi
        wrmsr
        ; mov   [esp + 36], eax
        ; mov   [esp + 24], edx ;ret in ebx?
@@:
ret

cache_disable:
       mov eax,cr0
       or  eax,01100000000000000000000000000000b
       mov cr0,eax
       wbinvd ;set MESI
ret

cache_enable:
       mov eax,cr0
       and eax,10011111111111111111111111111111b
       mov cr0,eax
ret

is_cache_enabled:
       mov eax,cr0
       mov ebx,eax
       and eax,01100000000000000000000000000000b
       jz cache_disabled
       mov [esp+36],ebx
cache_disabled:
       mov dword [esp+36],eax ;0
ret

modify_pce:
       mov eax,cr4
;       mov ebx,0
;       or  bx,100000000b ;pce
;       xor eax,ebx ;invert pce
       bts eax,8 ;pce=cr4[8]
       mov cr4,eax
       mov [esp+36],eax
ret
;---------------------------------------------------------------------------------------------


; check if pixel is allowed to be drawn

checkpixel:
        push eax edx

        mov  edx,[Screen_Max_X]     ; screen x size
        inc  edx
        imul edx, ebx
        mov  dl, [eax+edx+display_data] ; lea eax, [...]

        xor  ecx, ecx
        mov  eax, [CURRENT_TASK]
        cmp  al, dl
        setne cl

        pop  edx eax
        ret

iglobal
  cpustring db 'CPU',0
endg

uglobal
background_defined    db    0    ; diamond, 11.04.2006
endg

align 4
; check misc

checkmisc:

    cmp   [ctrl_alt_del], 1
    jne   nocpustart

        mov     ebp, cpustring
        call    fs_execute_from_sysdir

    mov   [ctrl_alt_del], 0

nocpustart:
    cmp   [mouse_active], 1
    jne   mouse_not_active
    mov   [mouse_active], 0
    xor   edi, edi
    mov   ecx,  [TASK_COUNT]
set_mouse_event:
    add   edi, 256
    or    [edi+SLOT_BASE+APPDATA.event_mask], dword 100000b
    loop  set_mouse_event

mouse_not_active:
    cmp   [REDRAW_BACKGROUND],byte 0               ; background update ?
    jz    nobackgr
    cmp    [background_defined], 0
    jz    nobackgr
    cmp   [REDRAW_BACKGROUND], byte 2
    jnz   no_set_bgr_event
    xor   edi, edi
    mov   ecx,  [TASK_COUNT]
set_bgr_event:
    add   edi, 256
    or    [edi+SLOT_BASE+APPDATA.event_mask], 16
    loop  set_bgr_event
no_set_bgr_event:
;    mov   [draw_data+32 + RECT.left],dword 0
;    mov   [draw_data+32 + RECT.top],dword 0
;    mov   eax,[Screen_Max_X]
;    mov   ebx,[Screen_Max_Y]
;    mov   [draw_data+32 + RECT.right],eax
;    mov   [draw_data+32 + RECT.bottom],ebx
    call  drawbackground
    mov   [REDRAW_BACKGROUND],byte 0
    mov   [MOUSE_BACKGROUND],byte 0

nobackgr:

    ; system shutdown request

    cmp  [SYS_SHUTDOWN],byte 0
    je   noshutdown

    mov  edx,[shutdown_processes]

    cmp  [SYS_SHUTDOWN],dl
    jne  no_mark_system_shutdown

    lea   ecx,[edx-1]
    mov   edx,OS_BASE+0x3040
    jecxz @f
markz:
    mov   [edx+TASKDATA.state],byte 3
    add   edx,0x20
    loop  markz
@@:

  no_mark_system_shutdown:

    call [disable_mouse]

    dec  byte [SYS_SHUTDOWN]
    je   system_shutdown

noshutdown:


    mov   eax,[TASK_COUNT]                  ; termination
    mov   ebx,TASK_DATA+TASKDATA.state
    mov   esi,1

newct:
    mov   cl,[ebx]
    cmp   cl,byte 3
    jz    terminate
    cmp   cl,byte 4
    jz    terminate

    add   ebx,0x20
    inc   esi
    dec   eax
    jnz   newct
    ret

; redraw screen

redrawscreen:

; eax , if process window_data base is eax, do not set flag/limits

         pushad
         push  eax

;;;         mov   ebx,2
;;;         call  delay_hs

         ;mov   ecx,0               ; redraw flags for apps
         xor   ecx,ecx
       newdw2:

         inc   ecx
         push  ecx

         mov   eax,ecx
         shl   eax,5
         add   eax,window_data

         cmp   eax,[esp+4]
         je    not_this_task
                                   ; check if window in redraw area
         mov   edi,eax

         cmp   ecx,1               ; limit for background
         jz    bgli

         mov   eax, [edi + WDATA.box.left]
         mov   ebx, [edi + WDATA.box.top]
         mov   ecx, [edi + WDATA.box.width]
         mov   edx, [edi + WDATA.box.height]
         add   ecx,eax
         add   edx,ebx

         mov   ecx,[dlye]   ; ecx = area y end     ebx = window y start
         cmp   ecx,ebx
         jb    ricino

         mov   ecx,[dlxe]   ; ecx = area x end     eax = window x start
         cmp   ecx,eax
         jb    ricino

         mov   eax, [edi + WDATA.box.left]
         mov   ebx, [edi + WDATA.box.top]
         mov   ecx, [edi + WDATA.box.width]
         mov   edx, [edi + WDATA.box.height]
         add   ecx, eax
         add   edx, ebx

         mov   eax,[dly]    ; eax = area y start     edx = window y end
         cmp   edx,eax
         jb    ricino

         mov   eax,[dlx]    ; eax = area x start     ecx = window x end
         cmp   ecx,eax
         jb    ricino

        bgli:

         cmp   ecx,1
         jnz   .az
         mov   al,[REDRAW_BACKGROUND]
         cmp   al,2
         jz    newdw8
         test  al,al
         jz    .az
         lea   eax,[edi+draw_data-window_data]
         mov   ebx,[dlx]
         cmp   ebx,[eax+RECT.left]
         jae   @f
         mov   [eax+RECT.left],ebx
        @@:
         mov   ebx,[dly]
         cmp   ebx,[eax+RECT.top]
         jae   @f
         mov   [eax+RECT.top],ebx
        @@:
         mov   ebx,[dlxe]
         cmp   ebx,[eax+RECT.right]
         jbe   @f
         mov   [eax+RECT.right],ebx
        @@:
         mov   ebx,[dlye]
         cmp   ebx,[eax+RECT.bottom]
         jbe   @f
         mov   [eax+RECT.bottom],ebx
        @@:
         jmp   newdw8
        .az:

         mov   eax,edi
         add   eax,draw_data-window_data

         mov   ebx,[dlx]          ; set limits
         mov   [eax + RECT.left], ebx
         mov   ebx,[dly]
         mov   [eax + RECT.top], ebx
         mov   ebx,[dlxe]
         mov   [eax + RECT.right], ebx
         mov   ebx,[dlye]
         mov   [eax + RECT.bottom], ebx

         sub   eax,draw_data-window_data

         cmp   dword [esp],1
         jne   nobgrd
         mov   byte [REDRAW_BACKGROUND], 1

       newdw8:
       nobgrd:

         mov   [eax + WDATA.fl_redraw],byte 1    ; mark as redraw

       ricino:

       not_this_task:

         pop   ecx

         cmp   ecx,[TASK_COUNT]
         jle   newdw2

         pop  eax
         popad

         ret

calculatebackground:   ; background

        mov   edi,display_data              ; set os to use all pixels
        mov   eax,0x01010101
        mov   ecx,1280*1024 / 4
        rep   stosd

        mov   byte [REDRAW_BACKGROUND], 0              ; do not draw background!

        ret

uglobal
  imax    dd 0x0
endg



delay_ms:     ; delay in 1/1000 sec


        push  eax
        push  ecx

        mov   ecx,esi
        ; <CPU clock fix by Sergey Kuzmin aka Wildwest>
        imul  ecx, 33941
        shr   ecx, 9
        ; </CPU clock fix>

        in    al,0x61
        and   al,0x10
        mov   ah,al
        cld

 cnt1:  in    al,0x61
        and   al,0x10
        cmp   al,ah
        jz    cnt1

        mov   ah,al
        loop  cnt1

        pop   ecx
        pop   eax

        ret


set_app_param:
        mov     edi, [TASK_BASE]
        mov     eax, [edi + TASKDATA.event_mask]
        mov     [edi + TASKDATA.event_mask], ebx
        mov     [esp+32], eax
        ret



delay_hs:     ; delay in 1/100 secs
; ebx = delay time
        push  ecx
        push  edx

        mov   edx,[timer_ticks]

      newtic:
        mov   ecx,[timer_ticks]
        sub   ecx,edx
        cmp   ecx,ebx
        jae   zerodelay

        call  change_task

        jmp   newtic

      zerodelay:
        pop   edx
        pop   ecx

        ret


memmove:       ; memory move in bytes

; eax = from
; ebx = to
; ecx = no of bytes
    test ecx, ecx
    jle  .ret


    push esi edi ecx

    mov  edi, ebx
    mov  esi, eax

    test ecx, not 11b
    jz   @f

    push ecx
    shr  ecx, 2
    rep  movsd
    pop  ecx
    and  ecx, 11b
    jz   .finish
  @@:
    rep  movsb

  .finish:
    pop  ecx edi esi
  .ret:
    ret


; <diamond> Sysfunction 34, read_floppy_file, is obsolete. Use 58 or 70 function instead.
;align 4
;
;read_floppy_file:
;
;; as input
;;
;; eax pointer to file
;; ebx file lenght
;; ecx start 512 byte block number
;; edx number of blocks to read
;; esi pointer to return/work area (atleast 20 000 bytes)
;;
;;
;; on return
;;
;; eax = 0 command succesful
;;       1 no fd base and/or partition defined
;;       2 yet unsupported FS
;;       3 unknown FS
;;       4 partition not defined at hd
;;       5 file not found
;; ebx = size of file
;
;     mov   edi,[TASK_BASE]
;     add   edi,0x10
;     add   esi,[edi]
;     add   eax,[edi]
;
;     pushad
;     mov  edi,esi
;     add  edi,1024
;     mov  esi,0x100000+19*512
;     sub  ecx,1
;     shl  ecx,9
;     add  esi,ecx
;     shl  edx,9
;     mov  ecx,edx
;     cld
;     rep  movsb
;     popad
;
;     mov   [esp+36],eax
;     mov   [esp+24],ebx
;     ret



align 4

sys_programirq:

    mov   eax, [TASK_BASE]
    add   ebx, [eax + TASKDATA.mem_start]

    cmp   ecx, 16
    jae   .not_owner
    mov   edi, [eax + TASKDATA.pid]
    cmp   edi, [irq_owner + 4 * ecx]
    je    .spril1
.not_owner:
    xor   ecx, ecx
    inc   ecx
    jmp   .end
  .spril1:

    shl   ecx, 6
    mov   esi, ebx
    lea   edi, [irq00read + ecx]
    push  16
    pop   ecx

    cld
    rep   movsd
  .end:
    mov   [esp+32], ecx
    ret


align 4

get_irq_data:
     movzx esi, bh                       ; save number of subfunction, if bh = 1, return data size, otherwise, read data
     xor   bh, bh
     cmp   ebx, 16
     jae   .not_owner
     mov   edx, [4 * ebx + irq_owner]    ; check for irq owner

     mov   eax,[TASK_BASE]

     cmp   edx,[eax+TASKDATA.pid]
     je    gidril1
.not_owner:
     xor   edx, edx
     dec   edx
     jmp   gid1

  gidril1:

     shl   ebx, 12
     lea   eax, [ebx + IRQ_SAVE]         ; calculate address of the beginning of buffer + 0x0 - data size
     mov   edx, [eax]                    ;                                              + 0x4 - data offset
     dec   esi
     jz    gid1
     test  edx, edx                      ; check if buffer is empty
     jz    gid1

     mov   ebx, [eax + 0x4]
     mov   edi, ecx

     mov   ecx, 4000                     ; buffer size, used frequently

     cmp   ebx, ecx                      ; check for the end of buffer, if end of buffer, begin cycle again
     jb    @f

     xor   ebx, ebx

   @@:

     lea   esi, [ebx + edx]              ; calculate data size and offset
     cld
     cmp   esi, ecx                      ; if greater than the buffer size, begin cycle again
     jbe   @f

     sub   ecx, ebx
     sub   edx, ecx

     lea   esi, [eax + ebx + 0x10]
     rep   movsb

     xor   ebx, ebx
   @@:
     lea   esi, [eax + ebx + 0x10]
     mov   ecx, edx
     add   ebx, edx

     rep   movsb
     mov   edx, [eax]
     mov   [eax], ecx                    ; set data size to zero
     mov   [eax + 0x4], ebx              ; set data offset

   gid1:
     mov   [esp+32], edx                 ; eax
     ret


set_io_access_rights:

     pushad

     mov edi, tss._io_map_0

;     mov   ecx,eax
;     and   ecx,7    ; offset in byte

;     shr   eax,3    ; number of byte
;     add   edi,eax

;     mov   ebx,1
;     shl   ebx,cl

     test  ebp,ebp
;     cmp   ebp,0                ; enable access - ebp = 0
     jnz   siar1

;     not   ebx
;     and   [edi],byte bl
     btr [edi], eax

     popad

     ret

siar1:

     bts [edi], eax
  ;  or    [edi],byte bl        ; disable access - ebp = 1

     popad

     ret

r_f_port_area:

     test  eax, eax
     jnz   free_port_area
;     je    r_port_area
;     jmp   free_port_area

;   r_port_area:

     pushad

     cmp   ebx,ecx            ; beginning > end ?
     ja    rpal1
     cmp   ecx,65536
     jae   rpal1
     mov   esi,[RESERVED_PORTS]
     test  esi,esi            ; no reserved areas ?
     je    rpal2
     cmp   esi,255            ; max reserved
     jae   rpal1
 rpal3:
     mov   edi,esi
     shl   edi,4
     add   edi,RESERVED_PORTS
     cmp   ebx,[edi+8]
     ja    rpal4
     cmp   ecx,[edi+4]
     jae   rpal1
;     jb    rpal4
;     jmp   rpal1
 rpal4:

     dec   esi
     jnz   rpal3
     jmp   rpal2
   rpal1:
     popad
     mov   eax,1
     ret

   rpal2:
     popad


     ; enable port access at port IO map
     cli
     pushad                        ; start enable io map

     cmp   ecx,65536 ;16384
     jae   no_unmask_io ; jge

     mov   eax,ebx

   new_port_access:

     pushad

     xor   ebp,ebp                ; enable - eax = port
     call  set_io_access_rights

     popad

     inc   eax
     cmp   eax,ecx
     jbe   new_port_access

   no_unmask_io:

     popad                         ; end enable io map
     sti

     mov   edi,[RESERVED_PORTS]
     add   edi,1
     mov   [RESERVED_PORTS],edi
     shl   edi,4
     add   edi,RESERVED_PORTS
     mov   esi,[TASK_BASE]
     mov   esi,[esi+TASKDATA.pid]
     mov   [edi],esi
     mov   [edi+4],ebx
     mov   [edi+8],ecx

     xor   eax, eax
     ret

free_port_area:

     pushad

     mov   esi,[RESERVED_PORTS]     ; no reserved areas ?
     test  esi,esi
     je    frpal2
     mov   edx,[TASK_BASE]
     mov   edx,[edx+TASKDATA.pid]
   frpal3:
     mov   edi,esi
     shl   edi,4
     add   edi,RESERVED_PORTS
     cmp   edx,[edi]
     jne   frpal4
     cmp   ebx,[edi+4]
     jne   frpal4
     cmp   ecx,[edi+8]
     jne   frpal4
     jmp   frpal1
   frpal4:
     dec   esi
     jnz   frpal3
   frpal2:
     popad
     mov   eax,1
     ret
   frpal1:
     mov   ecx,256
     sub   ecx,esi
     shl   ecx,4
     mov   esi,edi
     add   esi,16
     cld
     rep   movsb

     dec   dword [RESERVED_PORTS]

     popad


     ; disable port access at port IO map

     pushad                        ; start disable io map

     cmp   ecx,65536 ;16384
     jge   no_mask_io

     mov   eax,ebx

   new_port_access_disable:

     pushad

     mov   ebp,1                  ; disable - eax = port
     call  set_io_access_rights

     popad

     inc   eax
     cmp   eax,ecx
     jbe   new_port_access_disable

   no_mask_io:

     popad                         ; end disable io map

     xor   eax, eax
     ret


reserve_free_irq:

     xor   esi, esi
     inc   esi
     cmp   ecx, 16
     jae   ril1

     push  ecx
     lea   ecx, [irq_owner + 4 * ecx]
     mov   edx, [ecx]
     mov   eax, [TASK_BASE]
     mov   edi, [eax + TASKDATA.pid]
     pop   eax
     dec   ebx
     jnz   reserve_irq

     cmp   edx, edi
     jne   ril1
     dec   esi
     mov   [ecx], esi

     jmp   ril1

  reserve_irq:

     cmp   dword [ecx], 0
     jne   ril1

     mov   ebx, [f_irqs + 4 * eax]

     stdcall attach_int_handler, eax, ebx, dword 0

     mov   [ecx], edi

     dec   esi
   ril1:
     mov   [esp+32], esi ; return in eax
     ret

iglobal
f_irqs:
     dd 0x0
     dd 0x0
     dd p_irq2
     dd p_irq3
     dd p_irq4
     dd p_irq5
     dd p_irq6
     dd p_irq7
     dd p_irq8
     dd p_irq9
     dd p_irq10
     dd p_irq11
     dd 0x0
     dd 0x0
     dd p_irq14
     dd p_irq15

endg

drawbackground:
       inc   [mouse_pause]
       cmp   [SCR_MODE],word 0x12
       je   dbrv20
     dbrv12:
       cmp  [SCR_MODE],word 0100000000000000b
       jge  dbrv20
       cmp  [SCR_MODE],word 0x13
       je   dbrv20
       call  vesa12_drawbackground
       dec   [mouse_pause]
       call   [draw_pointer]
       ret
     dbrv20:
       cmp   [BgrDrawMode],dword 1
       jne   bgrstr
       call  vesa20_drawbackground_tiled
       dec   [mouse_pause]
       call   [draw_pointer]
       ret
     bgrstr:
       call  vesa20_drawbackground_stretch
       dec   [mouse_pause]
       call   [draw_pointer]
       ret

align 4

syscall_putimage:                       ; PutImage
sys_putimage:
     test  ecx,0x80008000
     jnz   .exit
     test  ecx,0x0000FFFF
     jz    .exit
     test  ecx,0xFFFF0000
     jnz   @f
  .exit:
     ret
 @@:
        mov     edi,[current_slot]
        add     dx,word[edi+APPDATA.wnd_clientbox.top]
        rol     edx,16
        add     dx,word[edi+APPDATA.wnd_clientbox.left]
        rol     edx,16
  .forced:
        push    ebp esi 0
        mov     ebp, putimage_get24bpp
        mov     esi, putimage_init24bpp
sys_putimage_bpp:
;        call    [disable_mouse] ; this will be done in xxx_putimage
;        mov     eax, vga_putimage
        cmp     [SCR_MODE], word 0x12
        jz      @f   ;.doit
        mov     eax, vesa12_putimage
        cmp     [SCR_MODE], word 0100000000000000b
        jae     @f
        cmp     [SCR_MODE], word 0x13
        jnz     .doit
@@:
        mov     eax, vesa20_putimage
.doit:
        inc     [mouse_pause]
        call    eax
        dec     [mouse_pause]
        pop     ebp esi ebp
        jmp     [draw_pointer]

syscall_putimage_palette:
        mov     edi, esi
        mov     esi, edx
        mov     edx, ecx
        mov     ecx, ebx
        mov     ebx, eax
sys_putimage_palette:
; ebx = pointer to image
; ecx = [xsize]*65536 + [ysize]
; edx = [xstart]*65536 + [ystart]
; esi = number of bits per pixel, must be 8, 24 or 32
; edi = pointer to palette
; ebp = row delta
        mov     eax, [CURRENT_TASK]
        shl     eax, 8
        add     dx, word [eax+SLOT_BASE+APPDATA.wnd_clientbox.top]
        rol     edx, 16
        add     dx, word [eax+SLOT_BASE+APPDATA.wnd_clientbox.left]
        rol     edx, 16
.forced:
        cmp     esi, 1
        jnz     @f
        push    edi
        mov     eax, [edi+4]
        sub     eax, [edi]
        push    eax
        push    dword [edi]
        push    0ffffff80h
        mov     edi, esp
        call    put_mono_image
        add     esp, 12
        pop     edi
        ret
@@:
        cmp     esi, 2
        jnz     @f
        push    edi
        push    0ffffff80h
        mov     edi, esp
        call    put_2bit_image
        pop     eax
        pop     edi
        ret
@@:
        cmp     esi, 4
        jnz     @f
        push    edi
        push    0ffffff80h
        mov     edi, esp
        call    put_4bit_image
        pop     eax
        pop     edi
        ret
@@:
        push    ebp esi ebp
        cmp     esi, 8
        jnz     @f
        mov     ebp, putimage_get8bpp
        mov     esi, putimage_init8bpp
        jmp     sys_putimage_bpp
@@:
        cmp     esi, 15
        jnz     @f
        mov     ebp, putimage_get15bpp
        mov     esi, putimage_init15bpp
        jmp     sys_putimage_bpp
@@:
        cmp     esi, 16
        jnz     @f
        mov     ebp, putimage_get16bpp
        mov     esi, putimage_init16bpp
        jmp     sys_putimage_bpp
@@:
        cmp     esi, 24
        jnz     @f
        mov     ebp, putimage_get24bpp
        mov     esi, putimage_init24bpp
        jmp     sys_putimage_bpp
@@:
        cmp     esi, 32
        jnz     @f
        mov     ebp, putimage_get32bpp
        mov     esi, putimage_init32bpp
        jmp     sys_putimage_bpp
@@:
        pop     ebp esi ebp
        ret

put_mono_image:
        push    ebp esi ebp
        mov     ebp, putimage_get1bpp
        mov     esi, putimage_init1bpp
        jmp     sys_putimage_bpp
put_2bit_image:
        push    ebp esi ebp
        mov     ebp, putimage_get2bpp
        mov     esi, putimage_init2bpp
        jmp     sys_putimage_bpp
put_4bit_image:
        push    ebp esi ebp
        mov     ebp, putimage_get4bpp
        mov     esi, putimage_init4bpp
        jmp     sys_putimage_bpp

putimage_init24bpp:
        lea     eax, [eax*3]
putimage_init8bpp:
        ret

align 16
putimage_get24bpp:
        movzx   eax, byte [esi+2]
        shl     eax, 16
        mov     ax, [esi]
        add     esi, 3
        ret     4
align 16
putimage_get8bpp:
        movzx   eax, byte [esi]
        push    edx
        mov     edx, [esp+8]
        mov     eax, [edx+eax*4]
        pop     edx
        inc     esi
        ret     4

putimage_init1bpp:
        add     eax, ecx
        push    ecx
        add     eax, 7
        add     ecx, 7
        shr     eax, 3
        shr     ecx, 3
        sub     eax, ecx
        pop     ecx
        ret
align 16
putimage_get1bpp:
        push    edx
        mov     edx, [esp+8]
        mov     al, [edx]
        add     al, al
        jnz     @f
        lodsb
        adc     al, al
@@:
        mov     [edx], al
        sbb     eax, eax
        and     eax, [edx+8]
        add     eax, [edx+4]
        pop     edx
        ret     4

putimage_init2bpp:
        add     eax, ecx
        push    ecx
        add     ecx, 3
        add     eax, 3
        shr     ecx, 2
        shr     eax, 2
        sub     eax, ecx
        pop     ecx
        ret
align 16
putimage_get2bpp:
        push    edx
        mov     edx, [esp+8]
        mov     al, [edx]
        mov     ah, al
        shr     al, 6
        shl     ah, 2
        jnz     .nonewbyte
        lodsb
        mov     ah, al
        shr     al, 6
        shl     ah, 2
        add     ah, 1
.nonewbyte:
        mov     [edx], ah
        mov     edx, [edx+4]
        movzx   eax, al
        mov     eax, [edx+eax*4]
        pop     edx
        ret     4

putimage_init4bpp:
        add     eax, ecx
        push    ecx
        add     ecx, 1
        add     eax, 1
        shr     ecx, 1
        shr     eax, 1
        sub     eax, ecx
        pop     ecx
        ret
align 16
putimage_get4bpp:
        push    edx
        mov     edx, [esp+8]
        add     byte [edx], 80h
        jc      @f
        movzx   eax, byte [edx+1]
        mov     edx, [edx+4]
        and     eax, 0x0F
        mov     eax, [edx+eax*4]
        pop     edx
        ret     4
@@:
        movzx   eax, byte [esi]
        add     esi, 1
        mov     [edx+1], al
        shr     eax, 4
        mov     edx, [edx+4]
        mov     eax, [edx+eax*4]
        pop     edx
        ret     4

putimage_init32bpp:
        shl     eax, 2
        ret
align 16
putimage_get32bpp:
        lodsd
        ret     4

putimage_init15bpp:
putimage_init16bpp:
        add     eax, eax
        ret
align 16
putimage_get15bpp:
; 0RRRRRGGGGGBBBBB -> 00000000RRRRR000GGGGG000BBBBB000
        push    ecx edx
        movzx   eax, word [esi]
        add     esi, 2
        mov     ecx, eax
        mov     edx, eax
        and     eax, 0x1F
        and     ecx, 0x1F shl 5
        and     edx, 0x1F shl 10
        shl     eax, 3
        shl     ecx, 6
        shl     edx, 9
        or      eax, ecx
        or      eax, edx
        pop     edx ecx
        ret     4

align 16
putimage_get16bpp:
; RRRRRGGGGGGBBBBB -> 00000000RRRRR000GGGGGG00BBBBB000
        push    ecx edx
        movzx   eax, word [esi]
        add     esi, 2
        mov     ecx, eax
        mov     edx, eax
        and     eax, 0x1F
        and     ecx, 0x3F shl 5
        and     edx, 0x1F shl 11
        shl     eax, 3
        shl     ecx, 5
        shl     edx, 8
        or      eax, ecx
        or      eax, edx
        pop     edx ecx
        ret     4

; eax x beginning
; ebx y beginning
; ecx x end
        ; edx y end
; edi color

__sys_drawbar:
        mov     esi,[current_slot]
        add     eax,[esi+APPDATA.wnd_clientbox.left]
        add     ecx,[esi+APPDATA.wnd_clientbox.left]
        add     ebx,[esi+APPDATA.wnd_clientbox.top]
        add     edx,[esi+APPDATA.wnd_clientbox.top]
  .forced:
    inc   [mouse_pause]
;        call    [disable_mouse]
    cmp   [SCR_MODE],word 0x12
    je   dbv20
   sdbv20:
    cmp  [SCR_MODE],word 0100000000000000b
    jge  dbv20
    cmp  [SCR_MODE],word 0x13
    je   dbv20
    call vesa12_drawbar
    dec   [mouse_pause]
    call   [draw_pointer]
    ret
  dbv20:
    call vesa20_drawbar
    dec   [mouse_pause]
    call   [draw_pointer]
    ret



kb_read:

        push    ecx edx

        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      kr_loop:
        in      al,0x64
        test    al,1
        jnz     kr_ready
        loop    kr_loop
        mov     ah,1
        jmp     kr_exit
      kr_ready:
        push    ecx
        mov     ecx,32
      kr_delay:
        loop    kr_delay
        pop     ecx
        in      al,0x60
        xor     ah,ah
      kr_exit:

        pop     edx ecx

        ret


kb_write:

        push    ecx edx

        mov     dl,al
;        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
;      kw_loop1:
;        in      al,0x64
;        test    al,0x20
;        jz      kw_ok1
;        loop    kw_loop1
;        mov     ah,1
;        jmp     kw_exit
;      kw_ok1:
        in      al,0x60
        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      kw_loop:
        in      al,0x64
        test    al,2
        jz      kw_ok
        loop    kw_loop
        mov     ah,1
        jmp     kw_exit
      kw_ok:
        mov     al,dl
        out     0x60,al
        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      kw_loop3:
        in      al,0x64
        test    al,2
        jz      kw_ok3
        loop    kw_loop3
        mov     ah,1
        jmp     kw_exit
      kw_ok3:
        mov     ah,8
      kw_loop4:
        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      kw_loop5:
        in      al,0x64
        test    al,1
        jnz     kw_ok4
        loop    kw_loop5
        dec     ah
        jnz     kw_loop4
      kw_ok4:
        xor     ah,ah
      kw_exit:

        pop     edx ecx

        ret


kb_cmd:

        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      c_wait:
        in      al,0x64
        test    al,2
        jz      c_send
        loop    c_wait
        jmp     c_error
      c_send:
        mov     al,bl
        out     0x64,al
        mov     ecx,0x1ffff ; last 0xffff, new value in view of fast CPU's
      c_accept:
        in      al,0x64
        test    al,2
        jz      c_ok
        loop    c_accept
      c_error:
        mov     ah,1
        jmp     c_exit
      c_ok:
        xor     ah,ah
      c_exit:
        ret


setmouse:  ; set mousepicture -pointer
           ; ps2 mouse enable

     mov     [MOUSE_PICTURE],dword mousepointer

     cli

     ret

if used _rdtsc
_rdtsc:
     bt [cpu_caps], CAPS_TSC
     jnc ret_rdtsc
     rdtsc
     ret
   ret_rdtsc:
     mov   edx,0xffffffff
     mov   eax,0xffffffff
     ret
end if

rerouteirqs:

        cli

        mov     al,0x11         ;  icw4, edge triggered
        out     0x20,al
        call    pic_delay
        out     0xA0,al
        call    pic_delay

        mov     al,0x20         ;  generate 0x20 +
        out     0x21,al
        call    pic_delay
        mov     al,0x28         ;  generate 0x28 +
        out     0xA1,al
        call    pic_delay

        mov     al,0x04         ;  slave at irq2
        out     0x21,al
        call    pic_delay
        mov     al,0x02         ;  at irq9
        out     0xA1,al
        call    pic_delay

        mov     al,0x01         ;  8086 mode
        out     0x21,al
        call    pic_delay
        out     0xA1,al
        call    pic_delay

        mov     al,255          ; mask all irq's
        out     0xA1,al
        call    pic_delay
        out     0x21,al
        call    pic_delay

        mov     ecx,0x1000
        cld
picl1:  call    pic_delay
        loop    picl1

        mov     al,255          ; mask all irq's
        out     0xA1,al
        call    pic_delay
        out     0x21,al
        call    pic_delay

        cli

        ret


pic_delay:

        jmp     pdl1
pdl1:   ret


sys_msg_board_str:

     pushad
   @@:
     cmp    [esi],byte 0
     je     @f
     mov    eax,1
     movzx  ebx,byte [esi]
     call   sys_msg_board
     inc    esi
     jmp    @b
   @@:
     popad
     ret

sys_msg_board_byte:
; in: al = byte to display
; out: nothing
; destroys: nothing
        pushad
        mov     ecx, 2
        shl     eax, 24
        jmp     @f

sys_msg_board_word:
; in: ax = word to display
; out: nothing
; destroys: nothing
        pushad
        mov     ecx, 4
        shl     eax, 16
        jmp     @f

sys_msg_board_dword:
; in: eax = dword to display
; out: nothing
; destroys: nothing
        pushad
        mov     ecx, 8
@@:
        push    ecx
        rol     eax, 4
        push    eax
        and     al, 0xF
        cmp     al, 10
        sbb     al, 69h
        das
        mov     bl, al
        xor     eax, eax
        inc     eax
        call    sys_msg_board
        pop     eax
        pop     ecx
        loop    @b
        popad
        ret

uglobal
  msg_board_data: times 4096 db 0
  msg_board_count dd 0x0
endg

sys_msg_board:

; eax=1 : write :  bl byte to write
; eax=2 :  read :  ebx=0 -> no data, ebx=1 -> data in al

        mov     ecx, [msg_board_count]
        cmp     eax, 1
        jne     .smbl1

if defined debug_com_base

        push    dx ax

       @@:                              ; Wait for empty transmit register  (yes, this slows down system..)
        mov     dx, debug_com_base+5
        in      al, dx
        test    al, 1 shl 5
        jz      @r

        mov     dx, debug_com_base      ; Output the byte
        mov     al, bl
        out     dx, al

        pop     ax dx

end if

        mov     [msg_board_data+ecx],bl
        inc     ecx
        and     ecx, 4095
        mov     [msg_board_count], ecx
        mov     [check_idle_semaphore], 5
        ret
.smbl1:
        cmp     eax, 2
        jne     .smbl2
        test    ecx, ecx
        jz      .smbl21
        mov     eax, msg_board_data+1
        mov     ebx, msg_board_data
        movzx   edx, byte [ebx]
        call    memmove
        dec     [msg_board_count]
        mov     [esp + 36], edx ;eax
        mov     [esp + 24], dword 1
        ret
.smbl21:
        mov     [esp+36], ecx
        mov     [esp+24], ecx
.smbl2:
        ret



sys_process_def:
        mov     edi, [CURRENT_TASK]

        dec     eax             ; 1 = set keyboard mode
     jne   no_set_keyboard_setup

     shl   edi,8
     mov   [edi+SLOT_BASE + APPDATA.keyboard_mode],bl

     ret

   no_set_keyboard_setup:

        dec     eax             ; 2 = get keyboard mode
     jne   no_get_keyboard_setup

     shl   edi,8
     movzx eax, byte [SLOT_BASE+edi + APPDATA.keyboard_mode]

     mov   [esp+36],eax

     ret

   no_get_keyboard_setup:

        dec     eax             ; 3 = get keyboard ctrl, alt, shift
     jne   no_get_keyboard_cas

;     xor   eax,eax
;     movzx eax,byte [shift]
;     movzx ebx,byte [ctrl]
;     shl   ebx,2
;     add   eax,ebx
;     movzx ebx,byte [alt]
;     shl   ebx,3
;     add   eax,ebx

 ;// mike.dld [
     mov   eax, [kb_state]
 ;// mike.dld ]

     mov   [esp+36],eax

     ret

   no_get_keyboard_cas:

        dec     eax
        jnz     no_add_keyboard_hotkey

        mov     eax, hotkey_list
@@:
        cmp     dword [eax+8], 0
        jz      .found_free
        add     eax, 16
        cmp     eax, hotkey_list+16*256
        jb      @b
        mov     dword [esp+36], 1
        ret
.found_free:
        mov     [eax+8], edi
        mov     [eax+4], ecx
        movzx   ebx, bl
        lea     ebx, [hotkey_scancodes+ebx*4]
        mov     ecx, [ebx]
        mov     [eax], ecx
        mov     [ebx], eax
        mov     [eax+12], ebx
        jecxz   @f
        mov     [ecx+12], eax
@@:
        and     dword [esp+36], 0
        ret

no_add_keyboard_hotkey:

        dec     eax
        jnz     no_del_keyboard_hotkey

        movzx   ebx, bl
        lea     ebx, [hotkey_scancodes+ebx*4]
        mov     eax, [ebx]
.scan:
        test    eax, eax
        jz      .notfound
        cmp     [eax+8], edi
        jnz     .next
        cmp     [eax+4], ecx
        jz      .found
.next:
        mov     eax, [eax]
        jmp     .scan
.notfound:
        mov     dword [esp+36], 1
        ret
.found:
        mov     ecx, [eax]
        jecxz   @f
        mov     edx, [eax+12]
        mov     [ecx+12], edx
@@:
        mov     ecx, [eax+12]
        mov     edx, [eax]
        mov     [ecx], edx
        xor     edx, edx
        mov     [eax+4], edx
        mov     [eax+8], edx
        mov     [eax+12], edx
        mov     [eax], edx
        mov     [esp+36], edx
        ret

no_del_keyboard_hotkey:
     ret


align 4

sys_gs:                         ; direct screen access

     cmp  eax,1                 ; resolution
     jne  no_gs1
     mov  eax,[Screen_Max_X]
     shl  eax,16
     mov  ax,[Screen_Max_Y]
     add  eax,0x00010001
     mov  [esp+36],eax
     ret
   no_gs1:

     cmp   eax,2                ; bits per pixel
     jne   no_gs2
     movzx eax,byte [ScreenBPP]
     mov   [esp+36],eax
     ret
   no_gs2:

     cmp   eax,3                ; bytes per scanline
     jne   no_gs3
     mov   eax,[BytesPerScanLine]
     mov   [esp+36],eax
     ret
   no_gs3:

     mov  [esp+36],dword -1
     ret


align 4 ; PCI functions

sys_pci:

     call  pci_api
     mov   [esp+36],eax
     ret


align 4  ;  system functions

syscall_setpixel:                       ; SetPixel

        mov     eax, ebx
        mov     ebx, ecx
        mov     ecx, edx
        mov     edx, [TASK_BASE]
        add     eax, [edx-twdw+WDATA.box.left]
        add     ebx, [edx-twdw+WDATA.box.top]
        mov     edi, [current_slot]
        add     eax, [edi+APPDATA.wnd_clientbox.left]
        add     ebx, [edi+APPDATA.wnd_clientbox.top]
        xor     edi, edi ; no force
;       mov     edi, 1
        call    [disable_mouse]
        jmp     [putpixel]

align 4

syscall_writetext:                      ; WriteText

        mov   eax,[TASK_BASE]
        mov   ebp,[eax-twdw+WDATA.box.left]
        push  esi
        mov   esi,[current_slot]
        add   ebp,[esi+APPDATA.wnd_clientbox.left]
        shl   ebp,16
        add   ebp,[eax-twdw+WDATA.box.top]
        add   bp,word[esi+APPDATA.wnd_clientbox.top]
        pop   esi
        add   ebx,ebp
        mov   eax,edi
        xor   edi,edi
        jmp   dtext

align 4

syscall_openramdiskfile:                ; OpenRamdiskFile

        mov     eax, ebx
        mov     ebx, ecx
        mov     ecx, edx
        mov     edx, esi
        mov     esi, 12
        call    fileread
        mov     [esp+32], eax
        ret

align 4

syscall_drawrect:                       ; DrawRect

        mov     edi, edx ; color + gradient
        and     edi, 0x80FFFFFF
        test    bx, bx  ; x.size
        je      .drectr
        test    cx, cx ; y.size
        je      .drectr

        mov     eax, ebx ; bad idea
        mov     ebx, ecx

        movzx   ecx, ax ; ecx - x.size
        shr     eax, 16 ; eax - x.coord
        movzx   edx, bx ; edx - y.size
        shr     ebx, 16 ; ebx - y.coord
        mov     esi, [current_slot]

        add     eax, [esi + APPDATA.wnd_clientbox.left]
        add     ebx, [esi + APPDATA.wnd_clientbox.top]
        add     ecx, eax
        add     edx, ebx
        jmp     [drawbar]
.drectr:
        ret

align 4
syscall_getscreensize:                  ; GetScreenSize
        mov     ax, [Screen_Max_X]
        shl     eax, 16
        mov     ax, [Screen_Max_Y]
        mov     [esp + 32], eax
        ret

align 4

syscall_cdaudio:                        ; CD

        cmp     eax, 4
        jb      .audio
        jz      .eject
        cmp     eax, 5
        jnz     .ret
.load:
        call    .reserve
        call    LoadMedium
        call    .free
        ret
.eject:
        call    .reserve
        call    clear_CD_cache
        call    allow_medium_removal
        call    EjectMedium
        call    .free
        ret
.audio:
     call  sys_cd_audio
     mov   [esp+36],eax
.ret:
     ret

.reserve:
        call    reserve_cd
        mov     eax, ebx
        shr     eax, 1
        and     eax, 1
        inc     eax
        mov     [ChannelNumber], ax
        mov     eax, ebx
        and     eax, 1
        mov     [DiskNumber], al
        call    reserve_cd_channel
        and     ebx, 3
        inc     ebx
        mov     [cdpos], ebx
        add     ebx, ebx
        mov     cl, 8
        sub     cl, bl
        mov     al, [DRIVE_DATA+1]
        shr     al, cl
        test    al, 2
        jz      .err
        ret
.free:
        call    free_cd_channel
        and     [cd_status], 0
        ret
.err:
        call    .free
        pop     eax
        ret

align 4

syscall_getpixel:                       ; GetPixel
     mov   ecx, [Screen_Max_X]
     inc   ecx
     xor   edx, edx
     mov   eax, ebx
     div   ecx
     mov   ebx, edx
     xchg  eax, ebx
     call  dword [GETPIXEL] ; eax - x, ebx - y
     mov   [esp + 32], ecx
     ret

align 4

syscall_getarea:
;eax = 36
;ebx = pointer to bufer for img BBGGRRBBGGRR...
;ecx = [size x]*65536 + [size y]
;edx = [start x]*65536 + [start y]
     pushad
         inc   [mouse_pause]
; Check of use of the hardware cursor.
      cmp  [disable_mouse],__sys_disable_mouse
          jne  @f
; Since the test for the coordinates of the mouse should not be used,
; then use the call [disable_mouse] is not possible!
      cmp  dword [MOUSE_VISIBLE],dword 0
      jne  @f
      pushf
      cli
      call draw_mouse_under
      popf
      mov  [MOUSE_VISIBLE],dword 1
@@:
     mov   edi,ebx
     mov   eax,edx
     shr   eax,16
     mov   ebx,edx
     and   ebx,0xffff
     dec   eax
           dec   ebx
     ; eax - x, ebx - y
     mov   edx,ecx
     
     shr   ecx,16
     and   edx,0xffff
     mov   esi,ecx
     ; ecx - size x, edx - size y
         
         mov   ebp,edx
         dec   ebp
     lea   ebp,[ebp*3]
         
         imul  ebp,esi
         
         mov   esi,ecx
         dec   esi
         lea   esi,[esi*3]
         
     add   ebp,esi
     add   ebp,edi

     add   ebx,edx
         
.start_y:
     push  ecx edx
.start_x:
     push  eax ebx ecx
     add   eax,ecx

     call  dword [GETPIXEL] ; eax - x, ebx - y
     
     mov   [ebp],cx
     shr   ecx,16
     mov   [ebp+2],cl

     pop   ecx ebx eax
     sub   ebp,3
     dec   ecx
     jnz   .start_x
         pop   edx ecx
         dec   ebx
     dec   edx
     jnz   .start_y
     dec        [mouse_pause]
; Check of use of the hardware cursor.
      cmp  [disable_mouse],__sys_disable_mouse
          jne  @f
         call  [draw_pointer]
@@:
     popad
     ret

align 4

syscall_drawline:                       ; DrawLine

        mov     edi, [TASK_BASE]
        movzx   eax, word[edi-twdw+WDATA.box.left]
        mov     ebp, eax
        mov     esi, [current_slot]
        add     ebp, [esi+APPDATA.wnd_clientbox.left]
        add     ax, word[esi+APPDATA.wnd_clientbox.left]
        add     ebp,ebx
        shl     eax, 16
        movzx   ebx, word[edi-twdw+WDATA.box.top]
        add     eax, ebp
        mov     ebp, ebx
        add     ebp, [esi+APPDATA.wnd_clientbox.top]
        add     bx, word[esi+APPDATA.wnd_clientbox.top]
        add     ebp, ecx
        shl     ebx, 16
        xor     edi, edi
        add     ebx, ebp
        mov     ecx, edx
        jmp     [draw_line]

align 4

syscall_getirqowner:                    ; GetIrqOwner

     cmp   ebx,16
     jae   .err

     cmp   [irq_rights + 4 * ebx], dword 2
     je    .err

     mov   eax,[4 * ebx + irq_owner]
     mov   [esp+32],eax

     ret
.err:
     or    dword [esp+32], -1
     ret

align 4

syscall_reserveportarea:                ; ReservePortArea and FreePortArea

     call  r_f_port_area
     mov   [esp+36],eax
     ret

align 4

syscall_threads:                        ; CreateThreads

     call  sys_threads
     mov   [esp+36],eax
     ret

align 4

stack_driver_stat:

     call  app_stack_handler            ; Stack status

;     mov   [check_idle_semaphore],5    ; enable these for zero delay
;     call  change_task                 ; between sent packet

     mov   [esp+36],eax
     ret

align 4

socket:                                 ; Socket interface
     call  app_socket_handler

;     mov   [check_idle_semaphore],5    ; enable these for zero delay
;     call  change_task                 ; between sent packet

     mov   [esp+36],eax
     mov   [esp+24],ebx
     ret

align 4

read_from_hd:                           ; Read from hd - fn not in use

     mov   edi,[TASK_BASE]
     add   edi,TASKDATA.mem_start
     add   eax,[edi]
     add   ecx,[edi]
     add   edx,[edi]
     call  file_read

     mov   [esp+36],eax
     mov   [esp+24],ebx

     ret

paleholder:
        ret

align 4
set_screen:
        cmp eax, [Screen_Max_X]
        jne .set

        cmp edx, [Screen_Max_Y]
        jne .set
        ret
.set:
        pushfd
        cli

        mov [Screen_Max_X], eax
        mov [Screen_Max_Y], edx

        mov [screen_workarea.right],eax
        mov [screen_workarea.bottom], edx
        inc eax
        shl eax, 2                      ;32 bpp
        mov [BytesPerScanLine], eax
        push ebx
        push esi
        push edi
        call    repos_windows
        mov     eax, 0
        mov     ebx, 0
        mov     ecx, [Screen_Max_X]
        mov     edx, [Screen_Max_Y]
        call    calculatescreen
        pop edi
        pop esi
        pop ebx

        popfd
        ret

; --------------- APM ---------------------
apm_entry    dp    0
apm_vf        dd    0
align 4
sys_apm:
    cmp    word [apm_vf], 0    ; Check APM BIOS enable
    jne    @f
    or     [esp + 48], byte 1    ; error
    mov    [esp + 36], dword 8    ; 32-bit protected-mode interface not supported
    ret

@@:
    xchg    eax, ecx
    xchg    ebx, ecx

    cmp    al, 3
    ja    @f
    and    [esp + 48], byte 0xfe    ; emulate func 0..3 as func 0
    mov    eax, [apm_vf]
    mov    [esp + 36], eax
    shr    eax, 16
    mov    [esp + 32], eax
    ret

@@:

    mov esi, [master_tab+(OS_BASE shr 20)]
    xchg [master_tab], esi
    push esi
    mov edi, cr3
    mov cr3, edi                 ;flush TLB

    call    pword [apm_entry]    ; call APM BIOS

    xchg eax, [esp]
    mov [master_tab], eax
    mov eax, cr3
    mov cr3, eax
    pop eax

    mov    [esp + 8 ], edi
    mov    [esp + 12], esi
    mov    [esp + 24], ebx
    mov    [esp + 28], edx
    mov    [esp + 32], ecx
    mov    [esp + 36], eax
    setc   al
    and    [esp + 48], byte 0xfe
    or     [esp + 48], al


    ret
; -----------------------------------------

align 4

undefined_syscall:                      ; Undefined system call
     mov   [esp + 32], dword -1
     ret

align 4
system_shutdown:          ; shut down the system

           cmp byte [BOOT_VAR+0x9030], 1
           jne @F
           ret
@@:
           call stop_all_services
           push 3                ; stop playing cd
           pop  eax
           call sys_cd_audio

yes_shutdown_param:
           cli

           mov  eax, kernel_file ; load kernel.mnt to 0x7000:0
           push 12
           pop  esi
           xor  ebx,ebx
           or   ecx,-1
           mov  edx, OS_BASE+0x70000
           call fileread

           mov  esi, restart_kernel_4000+OS_BASE+0x10000 ; move kernel re-starter to 0x4000:0
           mov  edi,OS_BASE+0x40000
           mov  ecx,1000
           rep  movsb

           mov  esi,OS_BASE+0x2F0000    ; restore 0x0 - 0xffff
           mov  edi, OS_BASE
           mov  ecx,0x10000/4
           cld
           rep movsd

           call restorefatchain

           mov al, 0xFF
           out 0x21, al
           out 0xA1, al

if 0
           mov  word [OS_BASE+0x467+0],pr_mode_exit
           mov  word [OS_BASE+0x467+2],0x1000

           mov  al,0x0F
           out  0x70,al
           mov  al,0x05
           out  0x71,al

           mov  al,0xFE
           out  0x64,al

           hlt
           jmp $-1

else
        cmp     byte [OS_BASE + 0x9030], 2
        jnz     no_acpi_power_off

; scan for RSDP
; 1) The first 1 Kb of the Extended BIOS Data Area (EBDA).
        movzx   eax, word [OS_BASE + 0x40E]
        shl     eax, 4
        jz      @f
        mov     ecx, 1024/16
        call    scan_rsdp
        jnc     .rsdp_found
@@:
; 2) The BIOS read-only memory space between 0E0000h and 0FFFFFh.
        mov     eax, 0xE0000
        mov     ecx, 0x2000
        call    scan_rsdp
        jc      no_acpi_power_off
.rsdp_found:
        mov     esi, [eax+16]   ; esi contains physical address of the RSDT
        mov     ebp, [ipc_tmp]
        stdcall map_page, ebp, esi, PG_MAP
        lea     eax, [esi+1000h]
        lea     edx, [ebp+1000h]
        stdcall map_page, edx, eax, PG_MAP
        and     esi, 0xFFF
        add     esi, ebp
        cmp     dword [esi], 'RSDT'
        jnz     no_acpi_power_off
        mov     ecx, [esi+4]
        sub     ecx, 24h
        jbe     no_acpi_power_off
        shr     ecx, 2
        add     esi, 24h
.scan_fadt:
        lodsd
        mov     ebx, eax
        lea     eax, [ebp+2000h]
        stdcall map_page, eax, ebx, PG_MAP
        lea     eax, [ebp+3000h]
        add     ebx, 0x1000
        stdcall map_page, eax, ebx, PG_MAP
        and     ebx, 0xFFF
        lea     ebx, [ebx+ebp+2000h]
        cmp     dword [ebx], 'FACP'
        jz      .fadt_found
        loop    .scan_fadt
        jmp     no_acpi_power_off
.fadt_found:
; ebx is linear address of FADT
        mov     edi, [ebx+40] ; physical address of the DSDT
        lea     eax, [ebp+4000h]
        stdcall map_page, eax, edi, PG_MAP
        lea     eax, [ebp+5000h]
        lea     esi, [edi+0x1000]
        stdcall map_page, eax, esi, PG_MAP
        and     esi, 0xFFF
        sub     edi, esi
        cmp     dword [esi+ebp+4000h], 'DSDT'
        jnz     no_acpi_power_off
        mov     eax, [esi+ebp+4004h] ; DSDT length
        sub     eax, 36+4
        jbe     no_acpi_power_off
        add     esi, 36
.scan_dsdt:
        cmp     dword [esi+ebp+4000h], '_S5_'
        jnz     .scan_dsdt_cont
        cmp     byte [esi+ebp+4000h+4], 12h ; DefPackage opcode
        jnz     .scan_dsdt_cont
        mov     dl, [esi+ebp+4000h+6]
        cmp     dl, 4 ; _S5_ package must contain 4 bytes
                      ; ...in theory; in practice, VirtualBox has 2 bytes
        ja      .scan_dsdt_cont
        cmp     dl, 1
        jb      .scan_dsdt_cont
        lea     esi, [esi+ebp+4000h+7]
        xor     ecx, ecx
        cmp     byte [esi], 0 ; 0 means zero byte, 0Ah xx means byte xx
        jz      @f
        cmp     byte [esi], 0xA
        jnz     no_acpi_power_off
        inc     esi
        mov     cl, [esi]
@@:
        inc     esi
        cmp     dl, 2
        jb      @f
        cmp     byte [esi], 0
        jz      @f
        cmp     byte [esi], 0xA
        jnz     no_acpi_power_off
        inc     esi
        mov     ch, [esi]
@@:
        jmp     do_acpi_power_off
.scan_dsdt_cont:
        inc     esi
        cmp     esi, 0x1000
        jb      @f
        sub     esi, 0x1000
        add     edi, 0x1000
        push    eax
        lea     eax, [ebp+4000h]
        stdcall map_page, eax, edi, PG_MAP
        push    PG_MAP
        lea     eax, [edi+1000h]
        push    eax
        lea     eax, [ebp+5000h]
        push    eax
        stdcall map_page
        pop     eax
@@:
        dec     eax
        jnz     .scan_dsdt
        jmp     no_acpi_power_off
do_acpi_power_off:
        mov     edx, [ebx+48]
        test    edx, edx
        jz      .nosmi
        mov     al, [ebx+52]
        out     dx, al
        mov     edx, [ebx+64]
@@:
        in      ax, dx
        test    al, 1
        jz      @b
.nosmi:
        and     cx, 0x0707
        shl     cx, 2
        or      cx, 0x2020
        mov     edx, [ebx+64]
        in      ax, dx
        and     ax, 203h
        or      ah, cl
        out     dx, ax
        mov     edx, [ebx+68]
        test    edx, edx
        jz      @f
        in      ax, dx
        and     ax, 203h
        or      ah, ch
        out     dx, ax
@@:
        jmp     $


no_acpi_power_off:
           mov  word [OS_BASE+0x467+0],pr_mode_exit
           mov  word [OS_BASE+0x467+2],0x1000

           mov  al,0x0F
           out  0x70,al
           mov  al,0x05
           out  0x71,al

           mov  al,0xFE
           out  0x64,al

           hlt
           jmp $-1

scan_rsdp:
        add     eax, OS_BASE
.s:
        cmp     dword [eax], 'RSD '
        jnz     .n
        cmp     dword [eax+4], 'PTR '
        jnz     .n
        xor     edx, edx
        xor     esi, esi
@@:
        add     dl, [eax+esi]
        inc     esi
        cmp     esi, 20
        jnz     @b
        test    dl, dl
        jz      .ok
.n:
        add     eax, 10h
        loop    .s
        stc
.ok:
        ret
end if

include "data32.inc"

__REV__ = __REV

uglobals_size = $ - endofcode
diff16 "end of kernel code",0,$