;
; MenuetOS Driver (vmode.mdr)
; Target: Vertical Refresh Rate programming and videomode changing
;
; Author: Trans <<<<<13>>>>>
; Date: 20.07.2003
;
; Version: 1.0
; OS: MenuetOS
; Compiler: FASM
;
OS_BASE equ 0x80000000
use32
macro align value { rb (value-1) - ($ + value-1) mod value }
org OS_BASE+0x0428000
headerstart=$
mdid db 'MDAZ' ; 4 byte id
mdhver dd 0x00 ; header version
mdcode dd MDSTART ; start of code
mdver dd 0x00000001 ; driver version (subversion*65536+version)
mdname db 'Trans VideoDriver' ; 32 bytes of full driver name
times (32-($-mdname)) db ' ' ;
headerlen=$-headerstart
times (256-headerlen) db 0 ; reserved area for future
MDSTART: ; start of driver code ( base_adr+256 bytes)
; ebx(=ecx in program):
; 1 - Get DriverInfo and Driver Initial Set
; 2 - Get Current Video Mode With Vertical Refresh Rate
; 3 - Change Video Mode
; 4 - Return at Start System Video Mode
; 5 - Change vertical and horizontal size of visible screen area
; 6 - Change Vert/Hor position visible area on screen (not complete yet)
;
; MAXF - ...
MAXF=5
;-------Main Manager-------------
pushad
cmp ebx,1
jb mdvm_00
cmp ebx,MAXF
ja mdvm_00
shl ebx,2
add ebx,mdvm_func_table
call dword [ebx]
mov [esp+28],eax
mov [esp+24],ecx
mov [esp+20],edx
mov [esp+16],ebx
popad
retn
mdvm_00:
popad
xor eax,eax
dec eax
retn
; ------Drivers Functions----------
align 4
; EBX=1 (in applications ECX=1)- Get DriverInfo and Driver Initial Set
;
; IN: ecx (in app. edx) - pointer to 512-bytes info area in application
; OUT:
;
vm_info_init:
push ecx
cmp [mdrvm],dword 0
jnz .vmii_00
call vm_safe_reg
call vm_get_initial_videomode
mov eax,[initvm]
mov [currvm],eax
call vm_search_sys_func_table
call vm_get_cur_vert_rate
mov [initrr],eax
call vm_calc_pixelclock
call vm_calc_refrate
inc [mdrvm]
.vmii_00:
pop ecx
call vm_transfer_drv_info
mov ebx,dword [refrate]
mov eax,dword [mdid] ;dword [systlb]
retn
align 4
; EBX=2 (in applications ECX=2)- Get Current Video Mode
;
; OUT: eax = X_screen*65536+Y_screen
; ebx = current vertical rate
; ecx = current video mode (number)
vm_get_cur_mode:
cmp [mdrvm],dword 0
jz .vmgcm_00
call vm_get_cur_vert_rate
mov eax,[OS_BASE+0FE00h]
mov ebx,[OS_BASE+0FE04h]
shl eax,16
add eax,ebx
add eax,00010001h
mov ebx,[refrate]
mov ecx,[currvm]
retn
.vmgcm_00:
xor eax,eax
dec eax
retn
align 4
; EBX=3 (in applications ECX=3)- Change Video Mode
;
; IN: ecx = VertRate*65536+VideoMode
; OUT: eax = 0 if no error
;
vm_set_video_mode:
cmp [mdrvm],dword 0
jz .vmsvm_00
call vm_set_selected_mode
; xor eax,eax
retn
.vmsvm_00:
xor eax,eax
dec eax
retn
align 4
; EBX=4 (in applications ECX=4)- Return at Start System Video Mode
;
; IN:
; OUT: eax = = 0 if no error
;
vm_restore_init_video_mode:
cmp [mdrvm],dword 0
jz .vmrivm_00
call vm_restore_reg
xor eax,eax
retn
.vmrivm_00:
xor eax,eax
dec eax
retn
align 4
; EBX=5 (in applications ECX=5)- Change vertical and horizontal size
; of visible screen area
; IN: ecx (in app. edx) = 0/1 - -/+ horizontal size on 1 position
; = 2/3 - -/+ vertical size on 1 position (8 pixels)
; ^-^----- not complete yet
; OUT: eax = = 0 if no error
;
vm_change_screen_size:
cmp [mdrvm],dword 0
jz .vmcss_00
cmp cl,1
ja .vmcss_01
mov eax,ecx
call vm_inc_dec_width
xor eax,eax
retn
.vmcss_01:
and ecx,01h
mov eax,ecx
; call vm_inc_dec_high ; not complete yet
xor eax,eax
retn
.vmcss_00:
xor eax,eax
dec eax
retn
align 4
; EBX=6 (in applications ECX=6)- Change Vert/Hor position visible area on screen
;
; IN: ecx (in app. edx) = 0/1 - -/+ horizontal position on 1 point
; = 2/3 - -/+ vertical position on 1 pixel
; ^-^----- not complete yet
; OUT: eax = 0 if no error
;
vm_change_position_screen:
cmp [mdrvm],dword 0
jz .vmcps_00
; ...
xor eax,eax
retn
.vmcps_00:
xor eax,eax
dec eax
retn
;-----Drivers Subfunctions---------
;
; Searching i40 system functions pointer table in kernel area location
;
vm_search_sys_func_table:
push eax ; eax - current value
push ecx ; ecx - will be counter of equevalent value
push edx ; edx - last value
push esi ; esi - current address
xor ecx,ecx
mov esi,OS_BASE+010000h ; Start address of kernel location
lodsd
mov edx,eax
cld
.vmssft_00:
cmp esi,OS_BASE+30000h
ja .vmssft_03
inc ecx
lodsd
cmp edx,eax
mov edx,eax
je .vmssft_00
cmp ecx,128
ja .vmssft_02
.vmssft_01:
xor ecx,ecx
jmp .vmssft_00
.vmssft_02:
cmp edx,0
je .vmssft_01
sub esi,256*4-1
mov [systlb],esi
xor ecx,ecx
.vmssft_03_0:
inc ecx
lodsd
cmp edx,eax
mov edx,eax
jne .vmssft_03_0
mov esi,dword [systlb]
cmp cx,60
jae .vmssft_03
add esi,256*4-4
lodsb
mov edx,eax
jmp .vmssft_01
.vmssft_03:
mov [systlb],esi
pop esi
pop edx
pop ecx
pop eax
retn
; IN:
; OUT: eax= vertical rate in Hz
vm_get_cur_vert_rate:
push edx
push ebx
xor eax,eax
mov edx,eax
mov ebx,eax
mov dx,03DAh
.vmgcvt_00:
in al,dx
test al,8
jz .vmgcvt_00
.vmgcvt_01:
in al,dx
test al,8
jnz .vmgcvt_01
mov ebx,edx
rdtsc
mov edx,ebx
mov ebx,eax
.vmgcvt_02:
in al,dx
test al,8
jz .vmgcvt_02
.vmgcvt_03:
in al,dx
test al,8
jnz .vmgcvt_03
rdtsc
sub eax,ebx
mov ebx,eax
mov eax,[OS_BASE+0F600h]
xor edx,edx
div ebx
inc eax
mov [refrate],eax
pop ebx
pop edx
retn
vm_calc_pixelclock:
push ebx
push edx
xor eax,eax
mov al,[_00]
add ax,5
shl eax,3
xor ebx,ebx
mov bl,[_06]
mov bh,[_07]
and bh,00100001b
btr bx,13
jnc .vmcpc_00
or bh,2
.vmcpc_00:
xor edx,edx
mul ebx
xor edx,edx
mul [initrr]
mov [pclock],eax
pop edx
pop ebx
retn
;
; Safe of initial CRTC state
;
vm_safe_reg:
push edx
push ebx
push ecx
push edi
cli
mov dx,3d4h ; CRTC
mov al,11h
out dx,al
inc dx
in al,dx
and al,7fh
out dx,al ; Clear protection bit
dec dx
xor ecx,ecx
mov cl,19h
xor bl,bl
mov edi,CRTCreg
.vmsr_00:
mov al,bl
out dx,al
inc dx
in al,dx
dec dx
stosb
inc bl
loop .vmsr_00
sti
pop edi
pop ecx
pop ebx
pop edx
retn
;
; Restore of initial CRTC state
;
vm_restore_reg:
push eax
push ebx
push edx
push esi
mov eax,[oldX]
mov [OS_BASE+0FE00h],eax
mov eax,[oldY]
mov [OS_BASE+0FE04h],eax
mov dx,03dah
.vmrr_00:
in al,dx
test al,8
jnz .vmrr_00
.vmrr_01:
in al,dx
test al,8
jnz .vmrr_01
cli
mov dx,03c4h
mov ax,0101h
out dx,ax
mov dx,3d4h ; CRTC
mov al,11h
out dx,al
inc dx
in al,dx
and al,7fh ; Clear Protection bit
out dx,al
dec dx
xor ecx,ecx
mov cl,19h
mov esi,CRTCreg
xor bl,bl
.vmrr_02:
lodsb
mov ah,al
mov al,bl
out dx,ax
inc bl
loop .vmrr_02
sti
; call ref_screen
pop esi
pop edx
pop ecx
pop eax
retn
; Calculate of possible vertical refrash rate
; (light version of function)
vm_calc_refrate:
push ebx
push ecx
push edx
push edi
push esi
mov eax,[pclock]
xor edx,edx
mov edi,_m1
mov ebx,eax
mov ecx,(1696*1065)
div ecx
xor edx,edx
stosw
add edi,8
mov eax,ebx
mov ecx,(1344*804)
div ecx
xor edx,edx
stosw
add edi,8
mov eax,ebx
mov ecx,(1056*636)
div ecx
xor edx,edx
stosw
add edi,8
mov eax,ebx
mov ecx,(800*524)
div ecx
xor edx,edx
stosw
mov edi,_m1
mov esi,edi
mov ecx,5*4
.vmcrr_00:
lodsw
cmp ax,55
jb .vmcrr_01
stosw
loop .vmcrr_00
pop esi
pop edi
pop edx
pop ecx
pop ebx
retn
.vmcrr_01:
xor ax,ax
stosw
loop .vmcrr_00
pop esi
pop edi
pop edx
pop ecx
pop ebx
retn
vm_get_initial_videomode:
push eax
mov eax,dword [OS_BASE+0FE00h]
mov [oldX],eax
mov eax,dword [OS_BASE+0FE04h]
mov [oldY],eax
mov eax,dword [OS_BASE+0FE0Ch] ; initial video mode
and ax,01FFh
mov dword [initvm],eax
pop eax
retn
; IN: eax = 0/1 - -/+ 1 position of width
vm_inc_dec_width:
push ebx
push edx
mov ebx,eax
mov dx,3d4h ; CRTC
mov al,11h
out dx,al
inc dx
in al,dx
and al,7fh ; Clear Protection bit
out dx,al
dec dx
xor al,al
out dx,al
inc dx
in al,dx
dec al
cmp bl,0
jnz .vmidr_00
inc al
inc al
.vmidr_00:
out dx,al
pop edx
pop ebx
retn
;
; Copy driver info to application area
;
; IN: ecx (in app. edx) - pointer to 512-bytes info area in application
; OUT:
vm_transfer_drv_info:
push ecx
push edi
push esi
mov eax,ecx
xor ecx,ecx
mov cl,32/4
mov esi,mdname
mov edi,drvname
rep movsd
mov ecx,eax
mov eax,[mdver]
mov [drvver],eax
mov edi,[OS_BASE+3010h]
mov edi,[edi+10h]
add edi,ecx
mov esi,drvinfo
xor ecx,ecx
mov cx,512
rep movsb
pop esi
pop edi
pop ecx
retn
;
; Set selected video mode
; (light version)
;
; IN: ecx = VertRate*65536+VideoMode
;
vm_set_selected_mode:
push edx
push ecx
push esi
ror ecx,16
cmp cx,00h
je .vmssm_03
rol ecx,16
mov eax,ecx
shl eax,16
shr eax,16
mov [currvm],eax
cmp cx,112h
jne .vmssm_00
mov esi,mode0
mov ecx,639
mov edx,479
jmp .vmssm_st00
.vmssm_00:
cmp cx,115h
jne .vmssm_01
mov esi,mode1
mov ecx,799
mov edx,599
jmp .vmssm_st00
.vmssm_01:
cmp cx,118h
jne .vmssm_02
mov esi,mode2
mov ecx,1023
mov edx,767
jmp .vmssm_st00
.vmssm_02:
cmp cx,11Bh
jne .vmssm_03
mov esi,mode2
mov ecx,1279
mov edx,1023
jmp .vmssm_st00
.vmssm_03:
xor eax,eax
dec eax
pop esi
pop ecx
pop edx
retn
.vmssm_st00:
mov [OS_BASE+0FE00h],ecx
mov [OS_BASE+0FE04h],edx
cli
mov dx,03c4h
lodsw
out dx,ax
mov dx,03d4h
mov al,11h
out dx,al
inc dx
in al,dx
and al,7fh
out dx,al
dec dx
mov ecx,13
.vmssm_st01:
lodsw
out dx,ax
loop .vmssm_st01
sti
xor eax,eax
pop esi
pop ecx
pop edx
retn
;------------DATA AREA---------------
align 4
mdvm_func_table:
dd MDSTART
dd vm_info_init, vm_get_cur_mode
dd vm_set_video_mode, vm_restore_init_video_mode
dd vm_change_screen_size, vm_change_position_screen
CRTCreg:
_00 db ?
_01 db ?
_02 db ?
_03 db ?
_04 db ?
_05 db ?
_06 db ?
_07 db ?
_08 db ?
_09 db ?
_0a db ?
_0b db ?
_0c db ?
_0d db ?
_0e db ?
_0f db ?
_10 db ?
_11 db ?
_12 db ?
_13 db ?
_14 db ?
_15 db ?
_16 db ?
_17 db ?
_18 db ?
_19 db ?
align 4
oldX dd ?
oldY dd ?
initvm dd ?
currvm dd 0
refrate dd 0
initrr dd 0
systlb dd 0
pclock dd ?
mdrvm dd 0 ; 0 - not drv init yet, 1 - already drv init
drvinfo:
drvname: times 32 db ' '
drvver dd 0
times (32-($-drvver))/4 dd 0
drvmode dw 011Bh,0118h,0115h,0112h
times (64-($-drvmode))/2 dw 00h
_m1 dw 0,0,0,0,0
_m2 dw 0,0,0,0,0
_m3 dw 0,0,0,0,0
_m4 dw 0,0,0,0,0
_m5 dw 0,0,0,0,0
times (512-($-drvinfo)) db 0
drvinfoend:
;1280x1024 - 11Bh
mode3:
dw 0101h
dw 0d000h,9f01h,9f02h,9303h,0a904h,1905h,2806h,5a07h
dw 0110h,8411h,0ff12h,0ff15h,2916h
;1024x768 - 118h
mode2:
dw 0101h
dw 0a400h,7f01h,7f02h,8703h,8404h,9505h,2406h,0f507h
dw 0310h,8911h,0ff12h,0ff15h,2516h
;800x600 - 115h
mode1:
dw 0101h
dw 8000h,6301h,6302h,8303h,6a04h,1a05h,7206h,0f007h
dw 5910h,8d11h,5712h,5715h,7316h
;640x480 - 112h, 12h
mode0:
dw 0101h
dw 6000h,4f01h,4f02h,8303h,5304h,9f05h,00b06h,3e07h
dw 0ea10h,8c11h,0df12h,0df15h,0c16h
; 640x400
;mymode0:
; dw 0101h
;_0_7 dw 5f00h,4f01h,4f02h,8303h,5304h,9f05h,0BF06h,1f07h
; dw 9c10h,8e11h,8f12h,9615h,0B916h ;,4013h
; 640x800
;mymode1:
; dw 0101h
; dw 5f00h,4f01h,4f02h,8003h,5004h,9f05h,06006h,0FF07h
; dw 2d10h,8f11h,2012h,2615h,05716h ;,4013h
DRVM_END: