918 lines
23 KiB
PHP
918 lines
23 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; BOOTCODE.INC ;;
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;; ;;
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;; 16 bit bootcode for MenuetOS ;;
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;; ;;
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;; Copyright 2002 Ville Turjanmaa ;;
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;; ;;
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;; See file COPYING for details ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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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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print: push si
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mov si,leftpr-0x10000
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call printplain
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pop si
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printplain: pusha
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mov dx,0x1000
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mov es,dx
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cmp byte [es:display_atboot-0x10000],2
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je printplain_exit
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mov ds,dx
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cld
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lodsb
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prpl1:
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mov ah,0xe
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xor bh,bh
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int 0x10
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lodsb
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cmp al,0
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jne prpl1
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printplain_exit:
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popa
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ret
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setbase1000: push ax
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mov ax,0x1000
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mov es,ax
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mov ds,ax
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pop ax
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ret
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getkey: push ecx
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push edx
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add ebx,0x0101
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xor eax,eax
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gk1:
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in al,0x60
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mov cl,al
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gk0:
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in al,0x60
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cmp al,cl
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je gk0
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cmp ax,11
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jg gk0
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gk0_1:
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mov cl,al
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; add al,47
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; mov [ds:keyinbs-0x10000],al
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; mov si,keyinbs-0x10000
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; call printplain
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gk12:
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in al,0x60
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cmp al,cl
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je gk12
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cmp ax,240
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jne gk13
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mov al,cl
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jmp gk14
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gk13:
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add cl,128
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cmp al,cl
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jne gk1
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sub al,128
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gk14:
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movzx edx,bl
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cmp eax,edx
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jb gk1
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movzx edx,bh
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cmp eax,edx
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jg gk1
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test ebx,0x010000
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jnz gk3
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mov cx,0x1000
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mov dx,cx
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add eax,47
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mov cx,ax
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cmp cx,58
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jb gk_nozero
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sub cx,10
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gk_nozero:
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mov [ds:keyin-0x10000],cl
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mov si,keyin-0x10000
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call printplain
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gk3:
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sub eax,48
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pop edx
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pop ecx
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ret
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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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start_of_code:
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; RESET 16 BIT SELECTORS/REGISTERS/STACK
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mov ax,0x1000
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mov es,ax
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mov ds,ax
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mov ax,0x2000
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mov ss,ax
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mov sp,0xffff
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xor ax,ax
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xor bx,bx
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xor cx,cx
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xor dx,dx
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xor si,si
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xor di,di
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xor bp,bp
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; DRAW FRAMES
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call setbase1000
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cmp byte [es:display_atboot-0x10000],2
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je no_mode_atboot
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mov ax,0x0003
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mov bx,0x0000
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mov dx,0x0000
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int 0x10
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no_mode_atboot:
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; Load & set russian VGA font (RU.INC)
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mov bp,RU_FNT1-10000h ; 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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push cs
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pop es
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int 10h
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mov bp,RU_FNT2-10000h ; 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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push cs
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pop es
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int 10h
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; End set VGA russian font
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call setbase1000
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mov ax,0xb800
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mov es,ax
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mov di,0
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mov si,d80x25-0x10000
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mov cx,80*25
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mov ah,1*16+15
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dfl1:
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cld
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lodsb
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stosw
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loop dfl1
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call setbase1000
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; SAY HI TO USER
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mov si,linef2-0x10000
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call printplain
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mov si,version-0x10000
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call print
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; TEST FOR 386+
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pushf
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pop ax
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mov dx,ax
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xor ax,0x4000
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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,0x4000
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and dx,0x4000
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cmp ax,dx
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jnz cpugood
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mov si,not386-0x10000
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call print
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jmp $
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cpugood:
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; RESET 32 BIT SELECTORS/REGISTERS/SELECTORS
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mov ax,0x1000
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mov es,ax
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mov ds,ax
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mov ax,0x2000
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mov ss,ax
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mov esp,0xffff
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xor eax,eax
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xor ebx,ebx
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xor ecx,ecx
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xor edx,edx
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xor esi,esi
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xor edi,edi
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xor ebp,ebp
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; FLUSH 8042 KEYBOARD CONTROLLER
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;// mike.dld [
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; mov al,0xED
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; out 0x60,al
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; or cx,-1
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; @@:
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; in al,0x64
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; test al,2
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; jz @f
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; loop @b
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; @@:
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; mov al,0
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; out 0x60,al
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; or cx,-1
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; @@:
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; in al,0x64
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; test al,2
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; jz @f
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; loop @b
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; @@:
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;// mike.dld ]
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; mov ecx,10000
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; fl1:
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; in al,0x64
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; loop fl1
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; test al,1
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; jz fl2
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; in al,0x60
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; jmp fl1
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; fl2:
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;****************************************************************
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; The function is modified Mario79
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;*****************************************************************
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; wait_kbd: ; variant 1
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; mov cx,2500h ;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 10 <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; test_kbd:
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; in al,64h ;<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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; test al,2 ;<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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; loopnz test_kbd
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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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mov cx,0
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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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; DISPLAY VESA INFORMATION
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mov ax,0x0
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mov es,ax
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mov ax,0x4f00
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mov di,0xa000
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int 0x10
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cmp ax,0x004f
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je vesaok2
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mov dx,0x1000
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mov es,dx
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mov si,novesa-0x10000
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call print
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mov ax,16
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jmp novesafound
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vesaok2:
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mov ax,[es:di+4]
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mov dx,ax
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add ax,'0'*256+'0'
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push word 0x1000
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pop es
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mov [es:vervesa+vervesa_off-0x10000], ah
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mov [es:vervesa+vervesa_off+2-0x10000], al
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; ivan 24/11/2004 begin
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;push ax
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; ivan 24/11/2004 end
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mov si,vervesa-0x10000
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call print
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novesafound:
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call setbase1000
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; ivan 24/11/2004 begin
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;pop bx
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; ivan 24/11/2004 end
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; ASK GRAPHICS MODE
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movzx eax,byte [es:preboot_graph-0x10000]
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cmp eax,0
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jne pre_graph
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mov si,gr_mode-0x10000
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call printplain
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gml0:
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mov ebx,0x0A01
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call getkey
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pre_graph:
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cmp eax,1
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jl sgml1
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cmp eax,8
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jg sgml1
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mov si,ax
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sub si,1
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shl si,4
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add si,gr_table-0x10000
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mov bx,[es:si+0]
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mov cx,[es:si+4]
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mov dx,[es:si+8]
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jmp gml10
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sgml1:
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cmp al,9
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jnz gml00
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mov bx,0x13
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mov cx,640
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mov dx,480
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push word 0x0
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pop es
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mov [es:0x9000],byte 32
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mov dword [es:0x9018],0x800000
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push word 0x1000
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pop es
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jmp gml10
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gml00:
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cmp al,0xa
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jnz gml02
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mov bx,0x12
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mov cx,640
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mov dx,480
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push word 0x0
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pop es
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mov [es:0x9000],byte 32
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mov dword [es:0x9018],0x800000
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push word 0x1000
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pop es
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jmp gml10
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gml02:
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jmp gml0
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gr_table:
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dd 0x112+0100000000000000b , 640 , 480 , 0
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dd 0x115+0100000000000000b , 800 , 600 , 0
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dd 0x118+0100000000000000b , 1024 , 768 , 0
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dd 0x11B+0100000000000000b , 1280 , 1024 , 0
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dd 0x112 , 640 , 480 , 0
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dd 0x115 , 800 , 600 , 0
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dd 0x118 , 1024 , 768 , 0
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dd 0x11B , 1280 ,1024 , 0
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gml10:
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push word 0x0000
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pop es
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mov [es:0x9008],bx
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mov [es:0x900A],cx
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mov [es:0x900C],dx
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push word 0x1000
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pop es
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mov ax,32
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cmp bx,0x13
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je nov
|
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cmp bx,0x12
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je nov
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; USE DEFAULTS OR PROBE
|
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|
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; bx - mode : cx - x size : dx - y size
|
||
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;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
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movzx ax,[es:preboot_gprobe-0x10000]
|
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test ax,ax
|
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jne pre_probe
|
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;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
||
|
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test bx,0100000000000000b
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jz noprobe
|
||
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mov si,probetext-0x10000
|
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call printplain
|
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push bx
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mov ebx,0x0201
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call getkey
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pop bx
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pre_probe:
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cmp ax,1
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je noprobe
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push cx dx
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mov bx,0x100
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newprobe:
|
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inc bx
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cmp bx,0x17f
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jne probemore
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mov si,prnotfnd-0x10000
|
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call printplain
|
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jmp $
|
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probemore:
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mov ax,0x4f01
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mov cx,bx
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and cx,0xfff
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push word 0x0000
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pop es
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mov di,0xa000
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int 0x10
|
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mov eax,[es:di] ; lfb ?
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test eax,10000000b
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jz newprobe
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||
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mov eax,[es:di+0x12] ; x size ?
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cmp ax,word [esp+2]
|
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jne newprobe
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mov eax,[es:di+0x14] ; y size ?
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cmp ax,dx
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jne newprobe
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movzx eax,byte [es:di+0x19]
|
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cmp eax,32 ;24
|
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jb newprobe
|
||
|
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push word 0x0000 ; save probed mode
|
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pop es
|
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add bx,0100000000000000b
|
||
mov [es:0x9008],bx
|
||
push word 0x1000
|
||
pop es
|
||
|
||
push bx
|
||
|
||
mov si,prid-0x10000
|
||
call printplain
|
||
|
||
pop bx dx cx
|
||
|
||
noprobe:
|
||
|
||
|
||
; FIND VESA 2.0 LFB & BPP
|
||
|
||
mov ax,0x4f01
|
||
mov cx,bx
|
||
and cx,0xfff
|
||
push word 0x0000
|
||
pop es
|
||
mov di,0xa000
|
||
int 0x10
|
||
; LFB
|
||
mov ecx,[es:di+0x28]
|
||
mov [es:0x9018],ecx
|
||
; BPP
|
||
movzx ax,byte [es:di+0x19]
|
||
mov [es:0x9000],ax
|
||
; ---- vbe voodoo
|
||
BytesPerScanLine equ 0x10
|
||
push ax
|
||
mov ax, [es:di+BytesPerScanLine]
|
||
mov [es:0x9001],ax
|
||
pop ax
|
||
; -----
|
||
nov:
|
||
cmp ax,24
|
||
jnz nbpp24
|
||
mov si,bt24-0x10000
|
||
jmp bppl
|
||
nbpp24:
|
||
cmp ax,32
|
||
jnz nbpp32
|
||
mov si,bt32-0x10000
|
||
jmp bppl
|
||
nbpp32:
|
||
mov si,btns-0x10000
|
||
call print
|
||
jmp $
|
||
bppl:
|
||
call printplain
|
||
|
||
|
||
; FIND VESA 1.2 PM BANK SWITCH ADDRESS
|
||
|
||
mov ax,0x4f0A
|
||
mov bx,0x0
|
||
int 0x10
|
||
xor eax,eax
|
||
xor ebx,ebx
|
||
mov ax,es
|
||
shl eax,4
|
||
mov bx,di
|
||
add eax,ebx
|
||
xor ebx,ebx
|
||
mov bx,[es:di]
|
||
add eax,ebx
|
||
push word 0x0
|
||
pop es
|
||
mov [es:0x9014],eax
|
||
push word 0x1000
|
||
pop es
|
||
|
||
|
||
|
||
; GRAPHICS ACCELERATION
|
||
|
||
mov al, [es:preboot_mtrr-0x10000]
|
||
test al,al
|
||
jne pre_mtrr
|
||
mov si,gr_acc-0x10000
|
||
call printplain
|
||
mov ebx,0x0201
|
||
call getkey
|
||
pre_mtrr:
|
||
push word 0x0000
|
||
pop es
|
||
mov [es:0x901C],al
|
||
push word 0x1000
|
||
pop es
|
||
mov si,linef-0x10000
|
||
call printplain
|
||
|
||
|
||
; VRR_M USE
|
||
|
||
mov al,[es:preboot_vrrm-0x10000]
|
||
test al,al
|
||
jne pre_vrrm
|
||
mov si,vrrmprint-0x10000
|
||
call print
|
||
mov ebx,0x0301
|
||
call getkey
|
||
pre_vrrm:
|
||
push word 0x0000
|
||
pop es
|
||
mov [es:0x9030],al
|
||
push word 0x1000
|
||
pop es
|
||
mov si,linef2-0x10000
|
||
call printplain
|
||
|
||
|
||
; MEMORY MODEL
|
||
|
||
; movzx eax,byte [es:preboot_memory-0x10000]
|
||
; cmp eax,0
|
||
; jne pre_mem
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
; mario79 - memory size ;
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
; mov ax,0E801h
|
||
;;; xor bx,bx ; thanks to Alexei for bugfix [18.07.2004]
|
||
; xor cx, cx
|
||
; xor dx, dx
|
||
; int 0x15
|
||
; movzx ebx, dx ;bx
|
||
; movzx eax, cx ;ax
|
||
; shl ebx,6 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> (x64)
|
||
; add eax,ebx
|
||
; add eax, 1000h ;440h
|
||
; cmp eax,40000h ; 256?
|
||
; jge mem_256_z
|
||
; cmp eax,20000h ; 128?
|
||
; jge mem_128_z
|
||
; cmp eax,10000h ; 64?
|
||
; jge mem_64_z
|
||
; cmp eax,8000h ; 32?
|
||
; jge mem_32_z
|
||
; jmp mem_16_z
|
||
;
|
||
;mem_256_z: mov si,memokz256-0x10000
|
||
; call printplain
|
||
; mov eax,5
|
||
; jmp pre_mem
|
||
;mem_128_z: mov si,memokz128-0x10000
|
||
; call printplain
|
||
; mov eax,4
|
||
; jmp pre_mem
|
||
;mem_64_z: mov si,memokz64-0x10000
|
||
; call printplain
|
||
; mov eax,3
|
||
; jmp pre_mem
|
||
;mem_32_z: mov si,memokz32-0x10000
|
||
; call printplain
|
||
; mov eax,2
|
||
; jmp pre_mem
|
||
;mem_16_z: mov si,memokz16-0x10000
|
||
; call printplain
|
||
; mov eax,1
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
; pre_mem:
|
||
; push word 0x0000
|
||
; pop es
|
||
; mov [es:0x9030],al
|
||
; push word 0x1000
|
||
; pop es
|
||
; mov si,linef-0x10000
|
||
; call printplain
|
||
|
||
|
||
|
||
|
||
; DIRECT WRITE TO LFB, PAGING DISABLED
|
||
|
||
; movzx eax,byte [es:preboot_lfb-0x10000]
|
||
; mov eax,1 ; paging disabled
|
||
; cmp eax,0
|
||
; jne pre_lfb
|
||
; mov si,gr_direct-0x10000
|
||
; call printplain
|
||
; mov ebx,0x0201
|
||
; call getkey
|
||
; pre_lfb:
|
||
; push word 0x0000
|
||
; pop es
|
||
; mov [es:0x901E],al
|
||
; mov ax,0x1000
|
||
; mov es,ax
|
||
; mov si,linef-0x10000
|
||
; call printplain
|
||
push 0
|
||
pop es
|
||
mov [es:0x901E],byte 1
|
||
push 0x1000
|
||
pop es
|
||
|
||
|
||
|
||
; BOOT DEVICE
|
||
|
||
movzx eax,byte [es:preboot_device-0x10000]
|
||
cmp eax,0
|
||
jne pre_device
|
||
mov si,bdev-0x10000
|
||
call printplain
|
||
mov ebx,0x0301
|
||
call getkey
|
||
pre_device:
|
||
dec al
|
||
mov [es:boot_dev-0x10000],al
|
||
mov si,linef-0x10000
|
||
call printplain
|
||
|
||
|
||
|
||
; READ DISKETTE TO MEMORY
|
||
|
||
cmp [boot_dev-0x10000],0
|
||
jne no_sys_on_floppy
|
||
mov si,diskload-0x10000
|
||
call print
|
||
mov ax,0x0000 ; reset drive
|
||
mov dx,0x0000
|
||
int 0x13
|
||
mov cx,0x0001 ; startcyl,startsector
|
||
mov dx,0x0000 ; starthead,drive
|
||
push word 80*2 ; read no of sect
|
||
reads:
|
||
pusha
|
||
xor si,si
|
||
newread:
|
||
push word 0x0
|
||
pop es
|
||
mov bx,0xa000 ; es:bx -> data area
|
||
mov ax,0x0200+18 ; read, no of sectors to read
|
||
int 0x13
|
||
cmp ah,0
|
||
jz goodread
|
||
add si,1
|
||
cmp si,10
|
||
jnz newread
|
||
mov si,badsect-0x10000
|
||
call printplain
|
||
jmp $
|
||
goodread:
|
||
; move -> 1mb
|
||
mov si,movedesc-0x10000
|
||
push word 0x1000
|
||
pop es
|
||
mov cx,256*18
|
||
mov ah,0x87
|
||
int 0x15
|
||
|
||
cmp ah,0 ; was the move successfull ?
|
||
je goodmove
|
||
mov dx,0x3f2 ; floppy motor off
|
||
mov al,0
|
||
out dx,al
|
||
mov si,memmovefailed-0x10000
|
||
call print
|
||
jmp $
|
||
goodmove:
|
||
|
||
mov eax,[es:movedesc-0x10000+0x18+2]
|
||
add eax,512*18
|
||
mov [es:movedesc-0x10000+0x18+2],eax
|
||
popa
|
||
inc dh
|
||
cmp dh,2
|
||
jnz bb2
|
||
mov dh,0
|
||
inc ch
|
||
pusha ; print prosentage
|
||
push word 0x1000
|
||
pop es
|
||
xor eax,eax ; 5
|
||
mov al,ch
|
||
shr eax,2
|
||
and eax,1
|
||
mov ebx,5
|
||
mul bx
|
||
add al,48
|
||
mov [es:pros+1-0x10000],al
|
||
xor eax,eax ; 10
|
||
mov al,ch
|
||
shr eax,3
|
||
add al,48
|
||
mov [es:pros-0x10000],al
|
||
mov si,pros-0x10000
|
||
call printplain
|
||
popa
|
||
bb2:
|
||
pop ax
|
||
dec ax
|
||
push ax
|
||
cmp ax,0
|
||
jnz rs
|
||
jmp readdone
|
||
rs:
|
||
jmp reads
|
||
movedesc:
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
|
||
db 0xff,0xff,0x0,0xa0,0x00,0x93,0x0,0x0
|
||
db 0xff,0xff,0x0,0x00,0x10,0x93,0x0,0x0
|
||
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
db 0x00,0x00,0x0,0x00,0x00,0x00,0x0,0x0
|
||
readdone:
|
||
pop ax
|
||
mov dx,0x3f2 ; floppy motor off
|
||
mov al,0
|
||
out dx,al
|
||
mov si,backspace-0x10000
|
||
call printplain
|
||
call printplain
|
||
mov si,okt-0x10000
|
||
call printplain
|
||
no_sys_on_floppy:
|
||
mov ax,0x0000 ; reset drive
|
||
mov dx,0x0000
|
||
int 0x13
|
||
mov dx,0x3f2 ; floppy motor off
|
||
mov al,0
|
||
out dx,al
|
||
|
||
|
||
; PAGE TABLE
|
||
|
||
push word 0x0000
|
||
pop es
|
||
mov ecx,[es:0x9018]
|
||
push ecx
|
||
|
||
map_mem equ 64 ; amount of memory to map
|
||
|
||
mov bx,0x6000
|
||
mov es,bx ; [es:di] = 6000:0
|
||
xor edi,edi
|
||
mov ecx,256*map_mem ; Map (mapmem) M
|
||
mov eax,7
|
||
cld
|
||
pt2:
|
||
cmp ecx,256*(map_mem-8) ; 8 M map to LFB
|
||
jnz pt3
|
||
pop eax
|
||
add eax,7
|
||
pt3:
|
||
cmp ecx,256*(map_mem-12) ; 12 M back to linear = physical
|
||
jnz pt4
|
||
mov eax,12*0x100000 + 7
|
||
pt4:
|
||
stosd
|
||
add eax,4096
|
||
loop pt2
|
||
|
||
mov bx,0x7100
|
||
mov es,bx
|
||
xor edi,edi
|
||
mov eax,8*0x100000+7
|
||
mov ecx,256*4
|
||
pt5:
|
||
stosd
|
||
add eax,0x1000
|
||
loop pt5
|
||
|
||
; 4 KB PAGE DIRECTORY
|
||
|
||
mov bx , 0x7F00
|
||
mov es , bx ; [es:di] = 7000:0
|
||
xor edi, edi
|
||
mov ecx, 64 / 4
|
||
mov eax, 0x60007 ; for 0 M
|
||
cld
|
||
pd4k:
|
||
stosd
|
||
add eax, 0x1000
|
||
loop pd4k
|
||
mov dword [es:0x800],0x71007 ;map region 0x80000000-0x803FFFFF to 0x800000-0xCFFFFF
|
||
xor esi,esi
|
||
mov edi,second_base_address shr 20
|
||
mov ecx,64/4
|
||
mov bx,0x7F00
|
||
mov ds,bx
|
||
rep movsd
|
||
mov bx,0x1000
|
||
mov ds,bx
|
||
|
||
mov eax, 0x7F000 +8+16 ; Page directory and enable caches
|
||
mov cr3, eax
|
||
|
||
; SET GRAPHICS
|
||
|
||
mov dx,0x0000
|
||
mov es,dx
|
||
mov bx,[es:0x9008]
|
||
mov ax,bx ; vga & 320x200
|
||
cmp ax,0x13
|
||
je setgr
|
||
cmp ax,0x12
|
||
je setgr
|
||
mov ax,0x4f02 ; Vesa
|
||
setgr:
|
||
int 0x10
|
||
cmp ah,0
|
||
jz gmok
|
||
mov si,fatalsel-0x10000
|
||
call print
|
||
jmp $
|
||
|
||
gmok:
|
||
mov dx,0x1000
|
||
mov es,dx
|
||
|
||
; set mode 0x12 graphics registers:
|
||
|
||
cmp bx,0x12
|
||
jne gmok2
|
||
|
||
mov al,0x05
|
||
mov dx,0x03ce
|
||
out dx,al ; select GDC mode register
|
||
mov al,0x02
|
||
mov dx,0x03cf
|
||
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
|
||
mov dx,0x03c5
|
||
out dx,al ; set mask for all planes 0-3
|
||
|
||
mov al,0x08
|
||
mov dx,0x03ce
|
||
out dx,al ; select GDC bit mask register
|
||
; for writes to 0x03cf
|
||
|
||
gmok2:
|
||
mov dx,0x1000
|
||
mov es,dx
|