forked from KolibriOS/kolibrios
1181 lines
33 KiB
PHP
1181 lines
33 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; BOOTCODE.INC ;;
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;; ;;
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;; KolibriOS 16-bit loader, ;;
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;; based on bootcode for MenuetOS ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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;==========================================================================
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;
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; 16 BIT FUNCTIONS
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;
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;==========================================================================
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putchar:
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; in: al=character
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mov ah, 0Eh
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mov bh, 0
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int 10h
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ret
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print:
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; in: si->string
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mov al, 186
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call putchar
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mov al, ' '
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call putchar
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printplain:
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; in: si->string
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pusha
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lodsb
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@@:
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call putchar
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lodsb
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cmp al, 0
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jnz @b
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popa
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ret
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getkey:
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; get number in range [bl,bh] (bl,bh in ['0'..'9'])
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; in: bx=range
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; out: ax=digit (1..9, 10 for 0)
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mov ah, 0
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int 16h
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cmp al, bl
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jb getkey
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cmp al, bh
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ja getkey
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push ax
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call putchar
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pop ax
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and ax, 0Fh
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jnz @f
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mov al, 10
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@@:
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ret
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setcursor:
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; in: dl=column, dh=row
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mov ah, 2
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mov bh, 0
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int 10h
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ret
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macro _setcursor row,column
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{
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mov dx, row*256 + column
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call setcursor
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}
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boot_read_floppy:
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push si
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xor si, si
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mov ah, 2 ; read
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@@:
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push ax
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int 0x13
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pop ax
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jnc @f
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inc si
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cmp si, 10
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jb @b
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mov si, badsect
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sayerr_plain:
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call printplain
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jmp $
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@@:
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pop si
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ret
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; convert abs. sector number (AX) to BIOS T:H:S
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; sector number = (abs.sector%BPB_SecPerTrk)+1
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; pre.track number = (abs.sector/BPB_SecPerTrk)
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; head number = pre.track number%BPB_NumHeads
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; track number = pre.track number/BPB_NumHeads
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; Return: cl - sector number
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; ch - track number
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; dl - drive number (0 = a:)
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; dh - head number
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conv_abs_to_THS:
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push bx
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mov bx,word [BPB_SecPerTrk]
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xor dx,dx
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div bx
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inc dx
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mov cl, dl ; cl = sector number
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mov bx,word [BPB_NumHeads]
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xor dx,dx
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div bx
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; !!!!!!! ax = track number, dx = head number
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mov ch,al ; ch=track number
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xchg dh,dl ; dh=head number
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mov dl,0 ; dl=0 (drive 0 (a:))
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pop bx
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retn
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; needed variables
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BPB_SecPerTrk dw 0 ; sectors per track
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BPB_NumHeads dw 0 ; number of heads
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BPB_FATSz16 dw 0 ; size of FAT
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BPB_RootEntCnt dw 0 ; count of root dir. entries
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BPB_BytsPerSec dw 0 ; bytes per sector
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BPB_RsvdSecCnt dw 0 ; number of reserved sectors
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BPB_TotSec16 dw 0 ; count of the sectors on the volume
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BPB_SecPerClus db 0 ; number of sectors per cluster
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BPB_NumFATs db 0 ; number of FAT tables
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abs_sector_adj dw 0 ; adjustment to make abs. sector number
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end_of_FAT dw 0 ; end of FAT table
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FirstDataSector dw 0 ; begin of data
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;=========================================================================
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;
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; 16 BIT CODE
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;
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;=========================================================================
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include 'bootvesa.inc' ;Include source for boot vesa
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start_of_code:
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cld
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; \begin{diamond}[02.12.2005]
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; if bootloader sets ax = 'KL', then ds:si points to loader block
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cmp ax, 'KL'
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jnz @f
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mov word [cs:cfgmanager.loader_block], si
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mov word [cs:cfgmanager.loader_block+2], ds
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@@:
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; \end{diamond}[02.12.2005]
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; if bootloader sets cx = 'HA' and dx = 'RD', then bx contains identifier of source hard disk
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; (see comment to bx_from_load)
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cmp cx, 'HA'
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jnz no_hd_load
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cmp dx,'RD'
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jnz no_hd_load
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mov word [cs:bx_from_load], bx ; {SPraid}[13.03.2007]
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no_hd_load:
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; set up stack
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mov ax, 3000h
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mov ss, ax
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mov sp, 0EC00h
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; set up segment registers
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push cs
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pop ds
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push cs
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pop es
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; set videomode
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mov ax, 3
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int 0x10
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if lang eq ru
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; Load & set russian VGA font (RU.INC)
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mov bp, RU_FNT1 ; RU_FNT1 - First part
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mov bx, 1000h ; 768 bytes
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mov cx, 30h ; 48 symbols
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mov dx, 80h ; 128 - position of first symbol
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mov ax, 1100h
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int 10h
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mov bp, RU_FNT2 ; RU_FNT2 -Second part
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mov bx, 1000h ; 512 bytes
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mov cx, 20h ; 32 symbols
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mov dx, 0E0h ; 224 - position of first symbol
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mov ax, 1100h
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int 10h
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; End set VGA russian font
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else if lang eq et
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mov bp, ET_FNT ; ET_FNT1
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mov bx, 1000h ;
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mov cx, 255 ; 256 symbols
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xor dx, dx ; 0 - position of first symbol
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mov ax, 1100h
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int 10h
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end if
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; draw frames
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push 0xb800
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pop es
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xor di, di
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mov ah, 1*16+15
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; draw top
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mov si, d80x25_top
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mov cx, d80x25_top_num * 80
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@@:
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lodsb
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stosw
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loop @b
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; draw spaces
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mov si, space_msg
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mov dx, 25 - d80x25_top_num - d80x25_bottom_num
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dfl1:
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push si
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mov cx, 80
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@@:
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lodsb
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stosw
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loop @b
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pop si
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dec dx
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jnz dfl1
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; draw bottom
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mov si, d80x25_bottom
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mov cx, d80x25_bottom_num * 80
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@@:
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lodsb
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stosw
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loop @b
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mov byte [space_msg+80], 0 ; now space_msg is null terminated
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_setcursor d80x25_top_num,0
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; TEST FOR 386+
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mov bx, 0x4000
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pushf
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pop ax
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mov dx, ax
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xor ax, bx
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push ax
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popf
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pushf
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pop ax
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and ax, bx
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and dx, bx
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cmp ax, dx
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jnz cpugood
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mov si, not386
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sayerr:
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call print
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jmp $
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cpugood:
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push 0
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popf
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sti
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; set up esp
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movzx esp, sp
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push 0
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pop es
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and word [es:0x9031], 0
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; \begin{Mario79}
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; find HDD IDE DMA PCI device
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; check for PCI BIOS
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mov ax, 0xB101
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int 0x1A
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jc .nopci
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cmp edx, 'PCI '
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jnz .nopci
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; find PCI class code
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; class 1 = mass storage
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; subclass 1 = IDE controller
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; a) class 1, subclass 1, programming interface 0x80
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mov ax, 0xB103
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mov ecx, 1*10000h + 1*100h + 0x80
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xor si, si ; device index = 0
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int 0x1A
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jnc .found
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; b) class 1, subclass 1, programming interface 0x8A
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mov ax, 0xB103
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mov ecx, 1*10000h + 1*100h + 0x8A
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xor si, si ; device index = 0
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int 0x1A
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jnc .found
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; c) class 1, subclass 1, programming interface 0x85
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mov ax, 0xB103
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mov ecx, 1*10000h + 1*100h + 0x85
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xor si, si
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int 0x1A
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jc .nopci
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.found:
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; get memory base
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mov ax, 0xB10A
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mov di, 0x20 ; memory base is config register at 0x20
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int 0x1A
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jc .nopci
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and cx, 0xFFF0 ; clear address decode type
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mov [es:0x9031], cx
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.nopci:
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; \end{Mario79}
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mov al, 0xf6 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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out 0x60, al
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xor cx, cx
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wait_loop: ; variant 2
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; reading state of port of 8042 controller
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in al, 64h
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and al, 00000010b ; ready flag
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; wait until 8042 controller is ready
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loopnz wait_loop
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;;;/diamond today 5.02.2008
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; set keyboard typematic rate & delay
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mov al, 0xf3
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out 0x60, al
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xor cx, cx
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@@:
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in al, 64h
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test al, 2
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loopnz @b
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mov al, 0
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out 0x60, al
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xor cx, cx
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@@:
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in al, 64h
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test al, 2
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loopnz @b
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; --------------- APM ---------------------
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and word [es:0x9044], 0 ; ver = 0.0 (APM not found)
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mov ax, 0x5300
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xor bx, bx
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int 0x15
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jc apm_end ; APM not found
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test cx, 2
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jz apm_end ; APM 32-bit protected-mode interface not supported
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mov [es:0x9044], ax ; Save APM Version
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mov [es:0x9046], cx ; Save APM flags
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; Write APM ver ----
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and ax, 0xf0f
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add ax, '00'
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mov si, msg_apm
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mov [si + 5], ah
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mov [si + 7], al
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_setcursor 0, 3
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call printplain
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; ------------------
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mov ax, 0x5304 ; Disconnect interface
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xor bx, bx
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int 0x15
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mov ax, 0x5303 ; Connect 32 bit mode interface
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xor bx, bx
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int 0x15
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mov [es:0x9040], ebx
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mov [es:0x9050], ax
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mov [es:0x9052], cx
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mov [es:0x9054], dx
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apm_end:
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_setcursor d80x25_top_num, 0
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;CHECK current of code
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cmp [cfgmanager.loader_block], -1
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jz noloaderblock
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les bx, [cfgmanager.loader_block]
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cmp byte [es:bx], 1
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mov si, loader_block_error
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jnz sayerr
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push 0
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pop es
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noloaderblock:
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; DISPLAY VESA INFORMATION
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call print_vesa_info
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call calc_vmodes_table
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call check_first_parm ;check and enable cursor_pos
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; \begin{diamond}[30.11.2005]
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cfgmanager:
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; settings:
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; a) preboot_graph = graphical mode
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; preboot_gprobe = probe this mode?
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; b) preboot_dma = use DMA access?
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; c) preboot_vrrm = use VRR?
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; d) preboot_device = from what boot?
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; determine default settings
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mov [.bSettingsChanged], 0
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;.preboot_gr_end:
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mov di, preboot_device
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; if image in memory is present and [preboot_device] is uninitialized,
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; set it to use this preloaded image
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cmp byte [di], 0
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jnz .preboot_device_inited
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cmp [.loader_block], -1
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jz @f
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les bx, [.loader_block]
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test byte [es:bx+1], 1
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jz @f
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mov byte [di], 3
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jmp .preboot_device_inited
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@@:
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; otherwise, set [preboot_device] to 1 (default value - boot from floppy)
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mov byte [di], 1
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.preboot_device_inited:
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; following 6 lines set variables to 1 if its current value is 0
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cmp byte [di+preboot_dma-preboot_device], 1
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adc byte [di+preboot_dma-preboot_device], 0
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cmp byte [di+preboot_biosdisk-preboot_device], 1
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adc byte [di+preboot_biosdisk-preboot_device], 0
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cmp byte [di+preboot_vrrm-preboot_device], 1
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adc byte [di+preboot_vrrm-preboot_device], 0
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; notify user
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_setcursor 5,2
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mov si, linef
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call printplain
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mov si, start_msg
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call print
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mov si, time_msg
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call print
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; get start time
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call .gettime
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mov [.starttime], eax
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mov word [.timer], .newtimer
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mov word [.timer+2], cs
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.printcfg:
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_setcursor 9,0
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mov si, current_cfg_msg
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call print
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mov si, curvideo_msg
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call print
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call draw_current_vmode
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mov si, usebd_msg
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cmp [preboot_biosdisk], 1
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call .say_on_off
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mov si, vrrm_msg
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cmp [preboot_vrrm], 1
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call .say_on_off
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mov si, preboot_device_msg
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call print
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mov al, [preboot_device]
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and eax, 7
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mov si, [preboot_device_msgs+eax*2]
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call printplain
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.show_remarks:
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; show remarks in gray color
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mov di, ((21-num_remarks)*80 + 2)*2
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push 0xB800
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pop es
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mov cx, num_remarks
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mov si, remarks
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.write_remarks:
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lodsw
|
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push si
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xchg ax, si
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mov ah, 1*16+7 ; background: blue (1), foreground: gray (7)
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push di
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.write_remark:
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lodsb
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test al, al
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jz @f
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stosw
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jmp .write_remark
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@@:
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pop di
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pop si
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add di, 80*2
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loop .write_remarks
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.wait:
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_setcursor 25,0 ; out of screen
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; set timer interrupt handler
|
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cli
|
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push 0
|
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pop es
|
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push dword [es:8*4]
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pop dword [.oldtimer]
|
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push dword [.timer]
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pop dword [es:8*4]
|
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; mov eax, [es:8*4]
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; mov [.oldtimer], eax
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; mov eax, [.timer]
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; mov [es:8*4], eax
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||
sti
|
||
; wait for keypressed
|
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xor ax,ax
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int 16h
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push ax
|
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; restore timer interrupt
|
||
; push 0
|
||
; pop es
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mov eax, [.oldtimer]
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mov [es:8*4], eax
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mov [.timer], eax
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||
_setcursor 7,0
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mov si, space_msg
|
||
call printplain
|
||
; clear remarks and restore normal attributes
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||
push es
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||
mov di, ((21-num_remarks)*80 + 2)*2
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push 0xB800
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||
pop es
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||
mov cx, num_remarks
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||
mov ax, ' ' + (1*16 + 15)*100h
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||
@@:
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push cx
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mov cx, 76
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rep stosw
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pop cx
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add di, 4*2
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loop @b
|
||
pop es
|
||
pop ax
|
||
; switch on key
|
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cmp al, 13
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jz .continue
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or al, 20h
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cmp al, 'a'
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jz .change_a
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cmp al, 'b'
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jz .change_b
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cmp al, 'c'
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jz .change_c
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||
cmp al, 'd'
|
||
jnz .show_remarks
|
||
_setcursor 15,0
|
||
mov si, bdev
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||
call print
|
||
mov bx, '14'
|
||
call getkey
|
||
mov [preboot_device], al
|
||
_setcursor 13,0
|
||
.d:
|
||
mov [.bSettingsChanged], 1
|
||
call clear_vmodes_table ;clear vmodes_table
|
||
jmp .printcfg
|
||
.change_a:
|
||
.loops:
|
||
call draw_vmodes_table
|
||
_setcursor 25,0 ; out of screen
|
||
xor ax,ax
|
||
int 0x16
|
||
; call clear_table_cursor ;clear current position of cursor
|
||
|
||
mov si,word [cursor_pos]
|
||
|
||
cmp ah,0x48;x,0x48E0 ; up
|
||
jne .down
|
||
cmp si,modes_table
|
||
jbe .loops
|
||
sub word [cursor_pos],size_of_step
|
||
jmp .loops
|
||
|
||
.down: cmp ah,0x50;x,0x50E0 ; down
|
||
jne .pgup
|
||
cmp word[es:si+10],-1
|
||
je .loops
|
||
add word [cursor_pos],size_of_step
|
||
jmp .loops
|
||
|
||
.pgup: cmp ah,0x49 ; page up
|
||
jne .pgdn
|
||
sub si, size_of_step*long_v_table
|
||
cmp si, modes_table
|
||
jae @f
|
||
mov si, modes_table
|
||
@@:
|
||
mov word [cursor_pos], si
|
||
mov si, word [home_cursor]
|
||
sub si, size_of_step*long_v_table
|
||
cmp si, modes_table
|
||
jae @f
|
||
mov si, modes_table
|
||
@@:
|
||
mov word [home_cursor], si
|
||
jmp .loops
|
||
|
||
.pgdn: cmp ah,0x51 ; page down
|
||
jne .enter
|
||
mov ax, [end_cursor]
|
||
add si, size_of_step*long_v_table
|
||
cmp si, ax
|
||
jb @f
|
||
mov si, ax
|
||
sub si, size_of_step
|
||
@@:
|
||
mov word [cursor_pos], si
|
||
mov si, word [home_cursor]
|
||
sub ax, size_of_step*long_v_table
|
||
add si, size_of_step*long_v_table
|
||
cmp si, ax
|
||
jb @f
|
||
mov si, ax
|
||
@@:
|
||
mov word [home_cursor], si
|
||
jmp .loops
|
||
|
||
.enter: cmp al,0x0D;x,0x1C0D ; enter
|
||
jne .loops
|
||
push word [cursor_pos]
|
||
pop bp
|
||
push word [es:bp]
|
||
pop word [x_save]
|
||
push word [es:bp+2]
|
||
pop word [y_save]
|
||
push word [es:bp+6]
|
||
pop word [number_vm]
|
||
mov word [preboot_graph],bp ;save choose
|
||
|
||
jmp .d
|
||
|
||
.change_b:
|
||
_setcursor 15,0
|
||
; mov si, ask_dma
|
||
; call print
|
||
; mov bx, '13'
|
||
; call getkey
|
||
; mov [preboot_dma], al
|
||
mov si, ask_bd
|
||
call print
|
||
mov bx, '12'
|
||
call getkey
|
||
mov [preboot_biosdisk], al
|
||
_setcursor 11,0
|
||
jmp .d
|
||
.change_c:
|
||
_setcursor 15,0
|
||
mov si, vrrmprint
|
||
call print
|
||
mov bx, '12'
|
||
call getkey
|
||
mov [preboot_vrrm], al
|
||
_setcursor 12,0
|
||
jmp .d
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
.say_on_off:
|
||
pushf
|
||
call print
|
||
mov si, on_msg
|
||
popf
|
||
jz @f
|
||
mov si, off_msg
|
||
@@: jmp printplain
|
||
; novesa and vervesa strings are not used at the moment of executing this code
|
||
virtual at novesa
|
||
.oldtimer dd ?
|
||
.starttime dd ?
|
||
.bSettingsChanged db ?
|
||
.timer dd ?
|
||
end virtual
|
||
.loader_block dd -1
|
||
.gettime:
|
||
mov ah, 0
|
||
int 1Ah
|
||
xchg ax, cx
|
||
shl eax, 10h
|
||
xchg ax, dx
|
||
ret
|
||
.newtimer:
|
||
push ds
|
||
push cs
|
||
pop ds
|
||
pushf
|
||
call [.oldtimer]
|
||
pushad
|
||
call .gettime
|
||
sub eax, [.starttime]
|
||
sub ax, 18*5
|
||
jae .timergo
|
||
neg ax
|
||
add ax, 18-1
|
||
mov bx, 18
|
||
xor dx, dx
|
||
div bx
|
||
if lang eq ru
|
||
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 5 ᥪ㭤, 4/3/2 ᥪ㭤<EFBFBD>, 1 ᥪ㭤<EFBFBD>
|
||
cmp al, 5
|
||
mov cl, ' '
|
||
jae @f
|
||
cmp al, 1
|
||
mov cl, '<27>'
|
||
jz @f
|
||
mov cl, '<27>'
|
||
@@: mov [time_str+9], cl
|
||
else if lang eq et
|
||
cmp al, 1
|
||
ja @f
|
||
mov [time_str+9], ' '
|
||
mov [time_str+10],' '
|
||
@@:
|
||
else
|
||
; wait 5/4/3/2 seconds, 1 second
|
||
cmp al, 1
|
||
mov cl, 's'
|
||
ja @f
|
||
mov cl, ' '
|
||
@@: mov [time_str+9], cl
|
||
end if
|
||
add al, '0'
|
||
mov [time_str+1], al
|
||
mov si, time_msg
|
||
_setcursor 7,0
|
||
call print
|
||
_setcursor 25,0
|
||
popad
|
||
pop ds
|
||
iret
|
||
.timergo:
|
||
push 0
|
||
pop es
|
||
mov eax, [.oldtimer]
|
||
mov [es:8*4], eax
|
||
mov sp, 0EC00h
|
||
.continue:
|
||
sti
|
||
_setcursor 6,0
|
||
mov si, space_msg
|
||
call printplain
|
||
call printplain
|
||
_setcursor 6,0
|
||
mov si, loading_msg
|
||
call print
|
||
_setcursor 15,0
|
||
cmp [.bSettingsChanged], 0
|
||
jz .load
|
||
cmp [.loader_block], -1
|
||
jz .load
|
||
les bx, [.loader_block]
|
||
mov eax, [es:bx+3]
|
||
push ds
|
||
pop es
|
||
test eax, eax
|
||
jz .load
|
||
push eax
|
||
mov si, save_quest
|
||
call print
|
||
.waityn:
|
||
mov ah, 0
|
||
int 16h
|
||
or al, 20h
|
||
cmp al, 'n'
|
||
jz .loadc
|
||
cmp al, 'y'
|
||
jnz .waityn
|
||
call putchar
|
||
mov byte [space_msg+80], 186
|
||
pop eax
|
||
push cs
|
||
push .cont
|
||
push eax
|
||
retf
|
||
.loadc:
|
||
pop eax
|
||
.cont:
|
||
push cs
|
||
pop ds
|
||
mov si, space_msg
|
||
mov byte [si+80], 0
|
||
_setcursor 15,0
|
||
call printplain
|
||
_setcursor 15,0
|
||
.load:
|
||
; \end{diamond}[02.12.2005]
|
||
|
||
; ASK GRAPHICS MODE
|
||
|
||
call set_vmode
|
||
|
||
; GRAPHICS ACCELERATION
|
||
; force yes
|
||
mov [es:0x901C], byte 1
|
||
|
||
; DMA ACCESS TO HD
|
||
|
||
mov al, [preboot_dma]
|
||
mov [es:0x901F], al
|
||
|
||
; VRR_M USE
|
||
|
||
mov al,[preboot_vrrm]
|
||
mov [es:0x9030], al
|
||
mov [es:0x901E], byte 1
|
||
|
||
; BOOT DEVICE
|
||
|
||
mov al, [preboot_device]
|
||
dec al
|
||
mov [boot_dev], al
|
||
|
||
; READ DISKETTE TO MEMORY
|
||
|
||
; cmp [boot_dev],0
|
||
jne no_sys_on_floppy
|
||
mov si,diskload
|
||
call print
|
||
xor ax, ax ; reset drive
|
||
xor dx, dx
|
||
int 0x13
|
||
; do we boot from CD-ROM?
|
||
mov ah, 41h
|
||
mov bx, 55AAh
|
||
xor dx, dx
|
||
int 0x13
|
||
jc .nocd
|
||
cmp bx, 0AA55h
|
||
jnz .nocd
|
||
mov ah, 48h
|
||
push ds
|
||
push es
|
||
pop ds
|
||
mov si, 0xa000
|
||
mov word [si], 30
|
||
int 0x13
|
||
pop ds
|
||
jc .nocd
|
||
push ds
|
||
lds si, [es:si+26]
|
||
test byte [ds:si+10], 40h
|
||
pop ds
|
||
jz .nocd
|
||
; yes - read all floppy by 18 sectors
|
||
|
||
; TODO: !!!! read only first sector and set variables !!!!!
|
||
; ...
|
||
; TODO: !!! then read flippy image track by track
|
||
|
||
mov cx, 0x0001 ; startcyl,startsector
|
||
.a1:
|
||
push cx dx
|
||
mov al, 18
|
||
mov bx, 0xa000
|
||
call boot_read_floppy
|
||
mov si, movedesc
|
||
push es
|
||
push ds
|
||
pop es
|
||
mov cx, 256*18
|
||
mov ah, 0x87
|
||
int 0x15
|
||
pop es
|
||
pop dx cx
|
||
test ah, ah
|
||
jnz sayerr_floppy
|
||
add dword [si+8*3+2], 512*18
|
||
inc dh
|
||
cmp dh, 2
|
||
jnz .a1
|
||
mov dh, 0
|
||
inc ch
|
||
cmp ch, 80
|
||
jae ok_sys_on_floppy
|
||
pusha
|
||
mov al, ch
|
||
shr ch, 2
|
||
add al, ch
|
||
aam
|
||
xchg al, ah
|
||
add ax, '00'
|
||
mov si, pros
|
||
mov [si], ax
|
||
call printplain
|
||
popa
|
||
jmp .a1
|
||
.nocd:
|
||
; no - read only used sectors from floppy
|
||
; now load floppy image to memory
|
||
; at first load boot sector and first FAT table
|
||
|
||
; read only first sector and fill variables
|
||
mov cx, 0x0001 ; first logical sector
|
||
xor dx, dx ; head = 0, drive = 0 (a:)
|
||
mov al, 1 ; read one sector
|
||
mov bx, 0xB000 ; es:bx -> data area
|
||
call boot_read_floppy
|
||
; fill the necessary parameters to work with a floppy
|
||
mov ax, word [es:bx+24]
|
||
mov word [BPB_SecPerTrk], ax
|
||
mov ax, word [es:bx+26]
|
||
mov word [BPB_NumHeads], ax
|
||
mov ax, word [es:bx+22]
|
||
mov word [BPB_FATSz16], ax
|
||
mov ax, word [es:bx+17]
|
||
mov word [BPB_RootEntCnt], ax
|
||
mov ax, word [es:bx+11]
|
||
mov word [BPB_BytsPerSec], ax
|
||
mov ax, word [es:bx+14]
|
||
mov word [BPB_RsvdSecCnt], ax
|
||
mov ax, word [es:bx+19]
|
||
mov word [BPB_TotSec16], ax
|
||
mov al, byte [es:bx+13]
|
||
mov byte [BPB_SecPerClus], al
|
||
mov al, byte [es:bx+16]
|
||
mov byte [BPB_NumFATs], al
|
||
; count of clusters in FAT12 ((size_of_FAT*2)/3)
|
||
mov ax, word [BPB_FATSz16]
|
||
mov cx, word [BPB_BytsPerSec]
|
||
xor dx, dx
|
||
mul cx
|
||
shl ax, 1
|
||
mov cx, 3
|
||
div cx ; now ax - number of clusters in FAT12
|
||
mov word [end_of_FAT], ax
|
||
|
||
; load first FAT table
|
||
mov cx, 0x0002 ; startcyl,startsector ; TODO!!!!!
|
||
xor dx, dx ; starthead,drive
|
||
mov al, byte [BPB_FATSz16] ; no of sectors to read
|
||
add bx, word [BPB_BytsPerSec] ; es:bx -> data area
|
||
call boot_read_floppy
|
||
mov bx, 0xB000
|
||
|
||
; and copy them to extended memory
|
||
mov si, movedesc
|
||
mov [si+8*2+3], bh ; from
|
||
|
||
mov ax, word [BPB_BytsPerSec]
|
||
shr ax, 1 ; words per sector
|
||
mov cx, word [BPB_RsvdSecCnt]
|
||
add cx, word [BPB_FATSz16]
|
||
mul cx
|
||
push ax ; save to stack count of words in boot+FAT
|
||
xchg ax, cx
|
||
|
||
push es
|
||
push ds
|
||
pop es
|
||
mov ah, 0x87
|
||
int 0x15
|
||
pop es
|
||
test ah, ah
|
||
jz @f
|
||
sayerr_floppy:
|
||
mov dx, 0x3f2
|
||
mov al, 0
|
||
out dx, al
|
||
mov si, memmovefailed
|
||
jmp sayerr_plain
|
||
@@:
|
||
pop ax ; restore from stack count of words in boot+FAT
|
||
shl ax, 1 ; make bytes count from count of words
|
||
and eax, 0ffffh
|
||
add dword [si+8*3+2], eax
|
||
|
||
; copy first FAT to second copy
|
||
; TODO: BPB_NumFATs !!!!!
|
||
add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!!
|
||
mov byte [si+8*2+3], bh ; bx - begin of FAT
|
||
|
||
mov ax, word [BPB_BytsPerSec]
|
||
shr ax, 1 ; words per sector
|
||
mov cx, word [BPB_FATSz16]
|
||
mul cx
|
||
mov cx, ax ; cx - count of words in FAT
|
||
|
||
push es
|
||
push ds
|
||
pop es
|
||
mov ah, 0x87
|
||
int 0x15
|
||
pop es
|
||
test ah, ah
|
||
jnz sayerr_floppy
|
||
|
||
mov ax, cx
|
||
shl ax, 1
|
||
and eax, 0ffffh ; ax - count of bytes in FAT
|
||
add dword [si+8*3+2], eax
|
||
|
||
; reading RootDir
|
||
; TODO: BPB_NumFATs
|
||
add bx, ax
|
||
add bx, 100h
|
||
and bx, 0ff00h ; bx - place in buffer to write RootDir
|
||
push bx
|
||
|
||
mov bx, word [BPB_BytsPerSec]
|
||
shr bx, 5 ; divide bx by 32
|
||
mov ax, word [BPB_RootEntCnt]
|
||
xor dx, dx
|
||
div bx
|
||
push ax ; ax - count of RootDir sectors
|
||
|
||
mov ax, word [BPB_FATSz16]
|
||
xor cx, cx
|
||
mov cl, byte [BPB_NumFATs]
|
||
mul cx
|
||
add ax, word [BPB_RsvdSecCnt] ; ax - first sector of RootDir
|
||
|
||
mov word [FirstDataSector], ax
|
||
pop bx
|
||
push bx
|
||
add word [FirstDataSector], bx ; Begin of data region of floppy
|
||
|
||
; read RootDir
|
||
call conv_abs_to_THS
|
||
pop ax
|
||
pop bx ; place in buffer to write
|
||
push ax
|
||
call boot_read_floppy ; read RootDir into buffer
|
||
; copy RootDir
|
||
mov byte [si+8*2+3], bh ; from buffer
|
||
pop ax ; ax = count of RootDir sectors
|
||
mov cx, word [BPB_BytsPerSec]
|
||
mul cx
|
||
shr ax, 1
|
||
mov cx, ax ; count of words to copy
|
||
push es
|
||
push ds
|
||
pop es
|
||
mov ah, 0x87
|
||
int 0x15
|
||
pop es
|
||
|
||
mov ax, cx
|
||
shl ax, 1
|
||
and eax, 0ffffh ; ax - count of bytes in RootDir
|
||
add dword [si+8*3+2], eax ; add count of bytes copied
|
||
|
||
; Reading data clusters from floppy
|
||
mov byte [si+8*2+3], bh
|
||
push bx
|
||
|
||
mov di, 2 ; First data cluster
|
||
.read_loop:
|
||
mov bx, di
|
||
shr bx, 1 ; bx+di = di*1.5
|
||
jnc .even
|
||
test word [es:bx+di+0xB200], 0xFFF0 ; TODO: may not be 0xB200 !!!
|
||
jmp @f
|
||
.even:
|
||
test word [es:bx+di+0xB200], 0xFFF ; TODO: may not be 0xB200 !!!
|
||
|
||
@@:
|
||
jz .skip
|
||
; read cluster di
|
||
;.read:
|
||
;conv cluster di to abs. sector ax
|
||
; ax = (N-2) * BPB_SecPerClus + FirstDataSector
|
||
mov ax, di
|
||
sub ax, 2
|
||
xor bx, bx
|
||
mov bl, byte [BPB_SecPerClus]
|
||
mul bx
|
||
add ax, word [FirstDataSector]
|
||
call conv_abs_to_THS
|
||
pop bx
|
||
push bx
|
||
mov al, byte [BPB_SecPerClus] ; number of sectors in cluster
|
||
call boot_read_floppy
|
||
push es
|
||
push ds
|
||
pop es
|
||
pusha
|
||
;
|
||
mov ax, word [BPB_BytsPerSec]
|
||
xor cx, cx
|
||
mov cl, byte [BPB_SecPerClus]
|
||
mul cx
|
||
shr ax, 1 ; ax = (BPB_BytsPerSec * BPB_SecPerClus)/2
|
||
mov cx, ax ; number of words to copy (count words in cluster)
|
||
;
|
||
mov ah, 0x87
|
||
int 0x15 ; copy data
|
||
test ah, ah
|
||
popa
|
||
pop es
|
||
jnz sayerr_floppy
|
||
; skip cluster di
|
||
.skip:
|
||
mov ax, word [BPB_BytsPerSec]
|
||
xor cx, cx
|
||
mov cl, byte [BPB_SecPerClus]
|
||
mul cx
|
||
and eax, 0ffffh ; ax - count of bytes in cluster
|
||
add dword [si+8*3+2], eax
|
||
|
||
mov ax, word [end_of_FAT] ; max cluster number
|
||
pusha
|
||
; draw percentage
|
||
; total clusters: ax
|
||
; read clusters: di
|
||
xchg ax, di
|
||
mov cx, 100
|
||
mul cx
|
||
div di
|
||
aam
|
||
xchg al, ah
|
||
add ax, '00'
|
||
mov si, pros
|
||
cmp [si], ax
|
||
jz @f
|
||
mov [si], ax
|
||
call printplain
|
||
@@:
|
||
popa
|
||
inc di
|
||
cmp di, word [end_of_FAT] ; max number of cluster
|
||
jnz .read_loop
|
||
pop bx ; clear stack
|
||
|
||
ok_sys_on_floppy:
|
||
mov si, backspace2
|
||
call printplain
|
||
mov si, okt
|
||
call printplain
|
||
no_sys_on_floppy:
|
||
xor ax, ax ; reset drive
|
||
xor dx, dx
|
||
int 0x13
|
||
mov dx, 0x3f2 ; floppy motor off
|
||
mov al, 0
|
||
out dx, al
|
||
|
||
|
||
; SET GRAPHICS
|
||
|
||
xor ax, ax
|
||
mov es, ax
|
||
|
||
mov ax, [es:0x9008] ; vga & 320x200
|
||
mov bx, ax
|
||
cmp ax, 0x13
|
||
je setgr
|
||
cmp ax, 0x12
|
||
je setgr
|
||
mov ax, 0x4f02 ; Vesa
|
||
setgr:
|
||
int 0x10
|
||
test ah, ah
|
||
mov si, fatalsel
|
||
jnz v_mode_error
|
||
; set mode 0x12 graphics registers:
|
||
cmp bx, 0x12
|
||
jne gmok2
|
||
|
||
mov al, 0x05
|
||
mov dx, 0x03ce
|
||
push dx
|
||
out dx, al ; select GDC mode register
|
||
mov al, 0x02
|
||
inc dx
|
||
out dx, al ; set write mode 2
|
||
|
||
mov al, 0x02
|
||
mov dx, 0x03c4
|
||
out dx, al ; select VGA sequencer map mask register
|
||
mov al, 0x0f
|
||
inc dx
|
||
out dx, al ; set mask for all planes 0-3
|
||
|
||
mov al, 0x08
|
||
pop dx
|
||
out dx, al ; select GDC bit mask register
|
||
; for writes to 0x03cf
|
||
gmok2:
|
||
push ds
|
||
pop es
|