struc VBE_VGAInfo {
.VESASignature dd ? ; char
.VESAVersion dw ? ; short
.OemStringPtr dd ? ; char *
.Capabilities dd ? ; ulong
.VideoModePtr dd ? ; ulong
.TotalMemory dw ? ; short
; VBE 2.0+
.OemSoftwareRev db ? ; short
.OemVendorNamePtr dw ? ; char *
.OemProductNamePtr dw ? ; char *
.OemProductRevPtr dw ? ; char *
.reserved rb 222 ; char
.OemData rb 256 ; char
}
struc VBE_ModeInfo {
.ModeAttributes dw ? ; short
.WinAAttributes db ? ; char
.WinBAttributes db ? ; char
.WinGranularity dw ? ; short
.WinSize dw ? ; short
.WinASegment dw ? ; ushort
.WinBSegment dw ? ; ushort
.WinFuncPtr dd ? ; void *
.BytesPerScanLine dw ? ; short
.XRes dw ? ; short
.YRes dw ? ; short
.XCharSize db ? ; char
.YCharSize db ? ; char
.NumberOfPlanes db ? ; char
.BitsPerPixel db ? ; char
.NumberOfBanks db ? ; char
.MemoryModel db ? ; char
.BankSize db ? ; char
.NumberOfImagePages db ? ; char
.res1 db ? ; char
.RedMaskSize db ? ; char
.RedFieldPosition db ? ; char
.GreenMaskSize db ? ; char
.GreenFieldPosition db ? ; char
.BlueMaskSize db ? ; char
.BlueFieldPosition db ? ; char
.RsvedMaskSize db ? ; char
.RsvedFieldPosition db ? ; char
.DirectColorModeInfo db ? ; char ; MISSED IN THIS TUTORIAL!! SEE ABOVE
; VBE 2.0+
.PhysBasePtr dd ? ; ulong
.OffScreenMemOffset dd ? ; ulong
.OffScreenMemSize dw ? ; short
; VBE 3.0+
.LinbytesPerScanLine dw ? ; short
.BankNumberOfImagePages db ? ; char
.LinNumberOfImagePages db ? ; char
.LinRedMaskSize db ? ; char
.LinRedFieldPosition db ? ; char
.LingreenMaskSize db ? ; char
.LinGreenFieldPosition db ? ; char
.LinBlueMaskSize db ? ; char
.LinBlueFieldPosition db ? ; char
.LinRsvdMaskSize db ? ; char
.LinRsvdFieldPosition db ? ; char
.MaxPixelClock dd ? ; ulong
.res2 rb 190 ; char
}
virtual at $A000
vi VBE_VGAInfo
mi VBE_ModeInfo
modes_table:
end virtual
cursor_pos dw 0 ;âðåìåííîå õðàíåíèå êóðñîðà.
home_cursor dw 0 ;current shows rows a table
end_cursor dw 0 ;end of position current shows rows a table
long_v_table equ 9 ;long of visible video table
size_of_step equ 10
scroll_area_size equ (long_v_table-2)
int2str:
dec bl
jz @f
xor edx,edx
div ecx
push edx
call int2str
pop eax
@@: or al,0x30
mov [ds:di],al
inc di
ret
int2strnz:
cmp eax,ecx
jb @f
xor edx,edx
div ecx
push edx
call int2strnz
pop eax
@@: or al,0x30
mov [es:di],al
inc di
ret
;-------------------------------------------------------
;Write message about incorrect v_mode and write message about jmp on swith v_mode
v_mode_error:
_setcursor 19,2
mov si, fatalsel
call printplain
_setcursor 20,2
mov si,pres_key
call printplain
xor eax,eax
int 16h
jmp cfgmanager.d
;-------------------------------------------------------
;
;-------------------------------------------------------
print_vesa_info:
_setcursor 5,2
mov [es:vi.VESASignature],'VBE2'
mov ax,0x4F00
mov di,vi ;0xa000
int 0x10
or ah,ah
jz @f
mov [es:vi.VESASignature],'VESA'
mov ax,$4F00
mov di,vi
int 0x10
or ah,ah
jnz .exit
@@:
cmp [es:vi.VESASignature],'VESA'
jne .exit
cmp [es:vi.VESAVersion],0x0100
jb .exit
jmp .vesaok2
.exit:
mov si,novesa
call printplain
ret
.vesaok2:
mov ax,[es:vi.VESAVersion]
add ax,'00'
mov [s_vesa.ver], ah
mov [s_vesa.ver+2], al
mov si,s_vesa
call printplain
_setcursor 4,2
mov si,word[es:vi.OemStringPtr]
mov di,si
push ds
mov ds,word[es:vi.OemStringPtr+2]
call printplain
pop ds
ret
;-----------------------------------------------------------------------------
calc_vmodes_table:
pushad
; push 0
; pop es
lfs si, [es:vi.VideoModePtr]
mov bx,modes_table
;save no vesa mode of work 320x200, EGA/CGA 256 梥⮢ and 640x480, VGA 16 梥⮢
mov word [es:bx],640
mov word [es:bx+2],480
mov word [es:bx+6],0x13
mov word [es:bx+10],640
mov word [es:bx+12],480
mov word [es:bx+16],0x12
add bx,20
.next_mode:
mov cx,word [fs:si] ; mode number
cmp cx,-1
je .modes_ok.2
mov ax,0x4F01
mov di,mi
int 0x10
or ah,ah
jnz .modes_ok.2;vesa_info.exit
test [es:mi.ModeAttributes],00000001b ;videomode support ?
jz @f
test [es:mi.ModeAttributes],00010000b ;picture ?
jz @f
test [es:mi.ModeAttributes],10000000b ;LFB ?
jz @f
; cmp [es:mi.BitsPerPixel], 24
; jb @f
cmp [es:mi.BitsPerPixel],16
jne .l0
cmp [es:mi.GreenMaskSize],5
jne .l0
mov [es:mi.BitsPerPixel],15
.l0:
cmp [es:mi.XRes],640
jb @f
cmp [es:mi.YRes],480
jb @f
; cmp [es:mi.BitsPerPixel],8
; jb @f
mov ax,[es:mi.XRes]
mov [es:bx+0],ax ; +0[2] : resolution X
mov ax,[es:mi.YRes]
mov [es:bx+2],ax ; +2[2] : resolution Y
mov ax,[es:mi.ModeAttributes]
mov [es:bx+4],ax ; +4[2] : attributes
cmp [s_vesa.ver],'2'
jb .lp1
or cx,0x4000 ; use LFB
.lp1: mov [es:bx+6],cx ; +6 : mode number
movzx ax,byte [es:mi.BitsPerPixel]
mov word [es:bx+8],ax ; +8 : bits per pixel
add bx,size_of_step
@@:
add si,2
jmp .next_mode
.modes_ok.2:
mov word[es:bx],-1 ;end video table
mov word[end_cursor],bx ;save end cursor position
;;;;;;;;;;;;;;;;;;
;Sort array
; mov si,modes_table
;.new_mode:
; mov ax,word [es:si]
; cmp ax,-1
; je .exxit
; add ax,word [es:si+2]
; add ax,word [es:si+8]
; mov bp,si
;.again:
; add bp,12
; mov bx,word [es:bp]
; cmp bx,-1
; je .exit
; add bx,word [es:bp+2]
; add bx,word [es:bp+8]
;
; cmp ax,bx
; ja .loops
; jmp .again
;.loops:
; push dword [es:si]
; push dword [es:si+4]
; push dword [es:si+8]
; push dword [es:bp]
; push dword [es:bp+4]
; push dword [es:bp+8]
;
; pop dword [es:si+8]
; pop dword [es:si+4]
; pop dword [es:si]
; pop dword [es:bp+8]
; pop dword [es:bp+4]
; pop dword [es:bp]
; jmp .new_mode
;
;.exit: add si,12
; jmp .new_mode
;.exxit:
popad
ret
;-----------------------------------------------------------------------------
draw_current_vmode:
push 0
pop es
mov si,word [cursor_pos]
cmp word [es:si+6],0x12
je .no_vesa_0x12
cmp word [es:si+6],0x13
je .no_vesa_0x13
mov di,loader_block_error
movzx eax,word[es:si+0]
mov ecx,10
call int2strnz
mov byte[es:di],'x'
inc di
movzx eax,word[es:si+2]
call int2strnz
mov byte[es:di],'x'
inc di
movzx eax,word[es:si+8]
call int2strnz
mov dword[es:di],0x00000d0a
mov si,loader_block_error
push ds
push es
pop ds
call printplain
pop ds
ret
.no_vesa_0x13:
mov si,mode0
jmp .print
.no_vesa_0x12:
mov si,mode9
.print:
call printplain
ret
;-----------------------------------------------------------------------------
check_first_parm:
mov ax,word [preboot_graph]
test ax,ax
jnz .no_zero ;if no zero
.zerro:
; mov ax,modes_table
; mov word [cursor_pos],ax
; mov word [home_cursor],ax
; mov word [preboot_graph],ax
;SET default video of mode first probe will fined a move of work 1024x768@32
mov ax,1024
mov bx,768
mov si,modes_table
call .loops
test ax,ax
jz .ok_found_mode
mov ax,800
mov bx,600
mov si,modes_table
call .loops
test ax,ax
jz .ok_found_mode
mov ax,640
mov bx,480
mov si,modes_table
call .loops
test ax,ax
jz .ok_found_mode
mov si,modes_table
.ok_found_mode:
mov word [home_cursor],si
; mov word [cursor_pos],si
mov word [preboot_graph],si
mov ax,si
.no_zero:
cmp ax,modes_table
jb .zerro ;check on correct if bellow
cmp ax,word [end_cursor]
ja .zerro ;check on correct if anymore
mov ecx,long_v_table
.loop: add ax,size_of_step
cmp ax,word [end_cursor]
jae .next_step
loop .loop
.next_step:
sub ax,size_of_step*long_v_table
cmp ax,modes_table
jae @f
mov ax,modes_table
@@:
mov word[home_cursor],ax
push word [preboot_graph]
pop word [cursor_pos]
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;
.loops:
cmp ax,word [es:si]
jne .next
cmp bx,word [es:si+2]
jne .next
cmp word [es:si+8],32
je .ok
cmp word [es:si+8],24
je .ok
.next: add si,size_of_step
cmp word [es:si],-1
je .exit
jmp .loops
.ok: xor ax,ax
.exit: ret
;-----------------------------------------------------------------------------
default_vmode:
;-----------------------------------------------------------------------------
draw_vmodes_table:
_setcursor 9, 2
mov si,gr_mode
call printplain
mov si,_st
call printplain
push word [cursor_pos]
pop ax
push word [home_cursor]
pop si
mov cx,si
cmp ax,si
je .ok
jb .low
add cx,size_of_step*long_v_table
cmp ax,cx
jb .ok
sub cx,size_of_step*long_v_table
add cx,size_of_step
cmp cx,word[end_cursor]
jae .ok
add si,size_of_step
push si
pop word [home_cursor]
jmp .ok
.low: sub cx,size_of_step
cmp cx,modes_table
jb .ok
push cx
push cx
pop word [home_cursor]
pop si
.ok:
mov bp,long_v_table ;show rows
.@@_next_bit:
cmp word [es:si+6],0x12
je .show_0x12
cmp word [es:si+6],0x13
je .show_0x13
movzx eax,word[es:si]
cmp ax,-1
je .@@_end
mov di,_rs+23
mov ecx,10
mov bl,4
call int2str
movzx eax,word[es:si+2]
inc di
mov bl,4
call int2str
movzx eax,word[es:si+8]
inc di
mov bl,2
call int2str
;clear cursor
mov word[ds:_r1+21],' '
mov word[ds:_r1+50],' '
mov word[ds:_r2+21],' '
mov word[ds:_r2+45],' '
mov word[ds:_rs+21],' '
mov word[ds:_rs+46],' '
cmp si, word [cursor_pos]
jne .next
;draw cursor
mov word[ds:_rs+21],'>>'
mov word[ds:_rs+46],'<<'
.next:
push si
mov si,_rs
.@@_sh:
call printplain
pop si
add si,size_of_step
dec bp
jnz .@@_next_bit
.@@_end:
mov si,_bt
call printplain
; show scroll
push es
push 0xB800
pop es
; arrows
mov di, (11*80+53)*2
mov al, 30
stosb
add di, 80*2-1
mov al, 32
mov cx, scroll_area_size
@@:
stosb
add di, 80*2-1
loop @b
mov al, 31
stosb
; calculate scroll size
mov ax, [end_cursor]
sub ax, modes_table
mov bx, size_of_step
cwd
div bx
mov si, ax ; si = size of list
mov ax, [home_cursor]
sub ax, modes_table
cwd
div bx
mov di, ax
mov ax, scroll_area_size*long_v_table
cwd
div si
test ax, ax
jnz @f
inc ax
@@:
cmp al, scroll_area_size
jb @f
mov al, scroll_area_size
@@:
mov cx, ax
; cx = scroll height
; calculate scroll pos
xor bx, bx ; initialize scroll pos
sub al, scroll_area_size+1
neg al
sub si, long_v_table-1
jbe .draw_scroll
mul di
div si
mov bx, ax
.draw_scroll:
mov al, 0xDB
imul di, bx, 80*2
add di, (12*80+53)*2
@@:
stosb
add di, 80*2-1
loop @b
pop es
ret
.show_0x13:
push si
cmp si, word [cursor_pos]
jne @f
mov word[ds:_r1+21],'>>'
mov word[ds:_r1+50],'<<'
@@:
mov si,_r1
jmp .@@_sh
.show_0x12:
push si
cmp si, word [cursor_pos]
jne @f
mov word[ds:_r2+21],'>>'
mov word[ds:_r2+45],'<<'
@@:
mov si,_r2
jmp .@@_sh
;-----------------------------------------------------------------------------
;Clear arrea of current video page (0xb800)
clear_vmodes_table:
pusha
; draw frames
push es
push 0xb800
pop es
mov di,1444
xor ax,ax
mov ah, 1*16+15
mov cx,70
mov bp,12
.loop_start:
rep stosw
mov cx,70
add di,20
dec bp ; 㬥ìè¨âì DX,
jns .loop_start
pop es
popa
ret
;-----------------------------------------------------------------------------
set_vmode:
push 0 ;0;x1000
pop es
mov si,word [preboot_graph] ;[preboot_graph]
mov cx,word [es:si+6] ; number of mode
mov ax,word [es:si+0] ; resolution X
mov bx,word [es:si+2] ; resolution Y
mov word [es:0x900A],ax ; resolution X
mov word [es:0x900C],bx ; resolution Y
mov word [es:0x9008],cx ; number of mode
cmp cx,0x12
je .mode0x12_0x13
cmp cx,0x13
je .mode0x12_0x13
cmp byte [s_vesa.ver],'2'
jb .vesa12
; VESA 2 and Vesa 3
mov ax,0x4f01
and cx,0xfff
mov di,mi;0xa000
int 0x10
; LFB
mov eax,[es:mi.PhysBasePtr];di+0x28]
mov [es:0x9018],eax
; ---- vbe voodoo
BytesPerLine equ 0x10
mov ax, [es:di+BytesPerLine]
mov [es:0x9001], ax
; BPP
cmp [es:mi.BitsPerPixel],16
jne .l0
cmp [es:mi.GreenMaskSize],5
jne .l0
mov [es:mi.BitsPerPixel],15
.l0:
mov al, byte [es:di+0x19]
mov [es:0x9000], al
jmp .exit
.mode0x12_0x13:
mov byte [es:0x9000], 32
or dword [es:0x9018], 0xFFFFFFFF; 0x800000
; VESA 1.2 PM BANK SWITCH ADDRESS
.vesa12:
mov ax,0x4f0A
xor bx,bx
int 0x10
xor eax,eax
xor ebx,ebx
mov ax,es
shl eax,4
mov bx,di
add eax,ebx
movzx ebx,word[es:di]
add eax,ebx
push 0x0000
pop es
mov [es:0x9014],eax
.exit:
ret
; mov dword[es:0x9018],0x000A0000
; ret
;=============================================================================
;=============================================================================
;=============================================================================