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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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BANKS.ASM
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Assembly Source File
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1992-06-25
|
17KB
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1,059 lines
include model.h
include vesa.h
;
; VGAKIT Version 5.0
;
; Copyright 1988,89,90,91,92 John Bridges
; Free for use in commercial, shareware or freeware applications
;
; BANKS.ASM
;
.data
OSEG equ DS: ;segment override for variable access
public bankadr
if @Codesize
bankadr dw offset _nobank
dw seg _nobank
else
bankadr dw offset _nobank
endif
public curbk
curbk dw ?
public vgamem,bksize
vgamem dw ? ;amount of memory on VGA card in K
bksize dw ? ;size of memory banks in K
public cirrus,everex,acumos,paradise,tseng,trident,t8900
public ativga,aheada,aheadb,oaktech,video7
public chipstech,tseng4,genoa,ncr,compaq,s3vga,vesa
cirrus dw ?
everex dw ?
acumos dw ?
paradise dw ?
tseng dw ?
trident dw ?
t8900 dw ?
ativga dw ?
aheada dw ?
aheadb dw ?
oaktech dw ?
video7 dw ?
chipstech dw ?
tseng4 dw ?
genoa dw ?
ncr dw ?
compaq dw ?
s3vga dw ?
vesa dw ?
first dw ? ;flag so whichvga() is only called once
retval dw ? ;first return value from whichvga()
.code
public newbank
public whichvga
newbank proc ;bank number is in AX
jmp OSEG[bankadr]
_tseng:: ;Tseng 3000 series
push ax
push dx
cli
mov OSEG[curbk],ax
and al,7
mov ah,al
shl al,1
shl al,1
shl al,1
or al,ah
or al,01000000b
mov dx,3cdh
out dx,al
sti
pop dx
pop ax
ret
_tseng4:: ;Tseng 4000 series
push ax
push dx
cli
mov OSEG[curbk],ax
mov ah,al
mov dx,3bfh ;Enable access to extended registers
mov al,3
out dx,al
mov dl,0d8h
mov al,0a0h
out dx,al
and ah,15
mov al,ah
shl al,1
shl al,1
shl al,1
shl al,1
or al,ah
mov dl,0cdh
out dx,al
sti
pop dx
pop ax
ret
_trident:: ;Trident
push ax
push dx
push ax
cli
mov OSEG[curbk],ax
mov dx,3ceh ;set pagesize to 64k
mov al,6
out dx,al
inc dl
in al,dx
dec dl
or al,4
mov ah,al
mov al,6
out dx,ax
mov dl,0c4h ;switch to BPS mode
mov al,0bh
out dx,al
inc dl
in al,dx
dec dl
pop ax
mov ah,al
xor ah,2
mov dx,3c4h
mov al,0eh
out dx,ax
sti
pop dx
pop ax
ret
_video7:: ;Video 7
push ax
push dx
push cx
cli
mov OSEG[curbk],ax
and ax,15
mov ch,al
mov dx,3c4h
mov ax,0ea06h
out dx,ax
mov ah,ch
and ah,1
mov al,0f9h
out dx,ax
mov al,ch
and al,1100b
mov ah,al
shr ah,1
shr ah,1
or ah,al
mov al,0f6h
out dx,al
inc dx
in al,dx
dec dx
and al,not 1111b
or ah,al
mov al,0f6h
out dx,ax
mov ah,ch
mov cl,4
shl ah,cl
and ah,100000b
mov dl,0cch
in al,dx
mov dl,0c2h
and al,not 100000b
or al,ah
out dx,al
sti
pop cx
pop dx
pop ax
ret
_paradise:: ;Paradise
push ax
push dx
push ax
cli
mov OSEG[curbk],ax
mov dx,3ceh
mov ax,50fh ;turn off write protect on VGA registers
out dx,ax
pop ax
mov ah,al
mov al,9
out dx,ax
sti
pop dx
pop ax
ret
_acumos:: ;AcuMos
push ax
push dx
push ax
cli
mov OSEG[curbk],ax
mov dx,3c4h ;Sequencer index 6
mov ax,1206h ;turn off write protect on VGA registers
out dx,ax
mov dx,3ceh
pop ax
mov ah,al
mov al,9
out dx,ax
sti
pop dx
pop ax
ret
_chipstech:: ;Chips & Tech
push ax
push dx
push ax
cli
mov OSEG[curbk],ax
mov dx,46e8h ;place chip in setup mode
mov ax,1eh
out dx,ax
mov dx,103h ;enable extended registers
mov ax,0080h
out dx,ax
mov dx,46e8h ;bring chip out of setup mode
mov ax,0eh
out dx,ax
pop ax
mov ah,al
mov al,10h
mov dx,3d6h
out dx,ax
sti
pop dx
pop ax
ret
_ativga:: ;ATI VGA Wonder
push ax
push dx
cli
mov OSEG[curbk],ax
mov ah,al
mov dx,1ceh
mov al,0b2h
out dx,al
inc dl
in al,dx
shl ah,1
and al,0e1h
or ah,al
mov al,0b2h
dec dl
out dx,ax
sti
pop dx
pop ax
ret
_everex:: ;Everex
push ax
push dx
push cx
cli
mov OSEG[curbk],ax
mov cl,al
mov dx,3c4h
mov al,8
out dx,al
inc dl
in al,dx
dec dl
shl al,1
shr cl,1
rcr al,1
mov ah,al
mov al,8
out dx,ax
mov dl,0cch
in al,dx
mov dl,0c2h
and al,0dfh
shr cl,1
jc nob2
or al,20h
nob2: out dx,al
sti
pop cx
pop dx
pop ax
ret
_aheada:: ;Ahead Systems Ver A
push ax
push dx
push cx
cli
mov OSEG[curbk],ax
mov ch,al
mov dx,3ceh ;Enable extended registers
mov ax,200fh
out dx,ax
mov dl,0cch ;bit 0
in al,dx
mov dl,0c2h
and al,11011111b
shr ch,1
jnc skpa
or al,00100000b
skpa: out dx,al
mov dl,0cfh ;bits 1,2,3
mov al,0
out dx,al
inc dx
in al,dx
dec dx
and al,11111000b
or al,ch
mov ah,al
mov al,0
out dx,ax
sti
pop cx
pop dx
pop ax
ret
_aheadb:: ;Ahead Systems Ver A
push ax
push dx
push cx
cli
mov OSEG[curbk],ax
mov ch,al
mov dx,3ceh ;Enable extended registers
mov ax,200fh
out dx,ax
mov ah,ch
mov cl,4
shl ah,cl
or ah,ch
mov al,0dh
out dx,ax
sti
pop cx
pop dx
pop ax
ret
_oaktech:: ;Oak Technology Inc OTI-067 and OTI-077
push ax
push dx
cli
mov OSEG[curbk],ax
and al,15
mov ah,al
shl al,1
shl al,1
shl al,1
shl al,1
or ah,al
mov al,11h
mov dx,3deh
out dx,ax
sti
pop dx
pop ax
ret
_genoa:: ;GENOA GVGA
push ax
push dx
cli
mov OSEG[curbk],ax
mov ah,al
shl al,1
shl al,1
shl al,1
or ah,al
mov al,6
or ah,40h
mov dx,3c4h
out dx,ax
sti
pop dx
pop ax
ret
_ncr:: ;NCR 77C22E
push ax
push dx
cli
mov OSEG[curbk],ax
mov ah,al
mov al,18h
mov dx,3c4h
out dx,ax
mov ax,19h
out dx,ax
sti
pop dx
pop ax
ret
_compaq:: ;Compaq
push ax
push dx
push ax
cli
mov OSEG[curbk],ax
mov dx,3ceh
mov ax,50fh ;unlock extended registers
out dx,ax
pop ax
mov ah,al
mov al,45h
out dx,ax
sti
pop dx
pop ax
ret
_s3vga:: ;S3 VGA
push ax
push dx
cli
mov OSEG[curbk],ax
sti
pop dx
pop ax
ret
_vesa:: ;Vesa SVGA interface
push ax
push bx
push cx
push dx
cli
mov OSEG[curbk],ax
mov dx,ax
xor bx,bx
mov ax,4f05h
int 10h
sti
pop dx
pop cx
pop bx
pop ax
ret
_nobank::
cli
mov OSEG[curbk],ax
sti
ret
newbank endp
bkadr macro func
mov [func],1
mov word ptr [bankadr],offset _&func
if @Codesize
mov word ptr [bankadr+2],seg _&func
endif
endm
nojmp macro
local lbl
jmp lbl
lbl:
endm
whichvga proc uses si di
local vesabuf[256]:byte
cmp [first],'FI'
jnz gotest
mov ax,[retval]
ret
gotest: mov word ptr [bankadr],offset _nobank
if @Codesize
mov word ptr [bankadr+2],seg _nobank
endif
mov [vgamem],256
mov [bksize],64
xor ax,ax
mov [curbk],ax
mov [cirrus],ax
mov [everex],ax
mov [paradise],ax
mov [tseng],ax
mov [trident],ax
mov [t8900],ax
mov [ativga],ax
mov [aheada],ax
mov [aheadb],ax
mov [oaktech],ax
mov [video7],ax
mov [chipstech],ax
mov [tseng4],ax
mov [genoa],ax
mov [ncr],ax
mov [compaq],ax
mov [s3vga],ax
mov [vesa],ax
mov [first],'FI'
mov si,1 ;flag for SVGA found
mov ax,ss
mov es,ax
lea di,vesabuf[0]
mov ax,4f00h
int 10h
cmp ax,4fh
jnz novesa
bkadr vesa
mov [bksize],64 ; (for now)
novesa: mov ax,0c000h ;ATI VGA detect (largely from ATI example code)
mov es,ax
cmp word ptr es:[40h],'13' ;ATI Signiture on the Video BIOS
jnz noati
bkadr ativga
mov [bksize],64 ; 64k bank size
mov dx,es:[10h] ; Get value of ATI extended register
mov bl,es:[43h] ; Get value of ATI chip version
cmp bl,'3'
jae v6up ; Use different method to determine
mov al,0bbh ; memory size of chip version is 3 or higher
cli
out dx,al
inc dx
in al,dx ; Get ramsize byte for chip versions 1 & 2
sti
test al,20h
jz no512
mov [vgamem],512
jmp short no512
v6up: mov al,0b0h ; Method used for newer ATI chip versions
cli
out dx,al
inc dx
in al,dx ; Get ramsize byte for versions 3-5
sti
test al,10h ; Check if ramsize byte indicates 256K or 512K bytes
jz v7up
mov [vgamem],512
v7up: cmp bl,'4' ; Check for ramsize for ATI chip versions 4 & 5
jb no512
test al,8 ; Check if version 5 ATI chip has 1024K
jz no512
mov [vgamem],1024
no512: jmp fini
noati: mov ax,7000h ;Test for Everex
xor bx,bx
cld
int 10h
cmp al,70h
jnz noev
bkadr everex
mov [bksize],64 ; 64k bank size
and ch,11000000b ;how much memory on board
jz skp
mov [vgamem],512
skp: ;fall through for Everex boards using Trident or Tseng4000
noev: mov ax,0bf03h ;Test for Compaq
xor bx,bx
mov cx,bx
int 10h
cmp ax,0bf03h
jnz nocp
test cl,40h ;is 640x480x256 available?
jz nocp
bkadr compaq
mov [bksize],4 ; 4k bank size
mov [vgamem],512
jmp fini
nocp: mov dx,3c4h ;Test for NCR 77C22E
mov ax,0ff05h
call _isport2
jnz noncr
mov ax,5 ;Disable extended registers
out dx,ax
mov ax,0ff10h ;Try to write to extended register 10
call _isport2 ;If it writes then not NCR
jz noncr
mov ax,105h ;Enable extended registers
out dx,ax
mov ax,0ff10h
call _isport2
jnz noncr ;If it does NOT write then not NCR
bkadr ncr
mov [bksize],16 ; 16k bank size
mov [vgamem],512
jmp fini
noncr: mov dx,3c4h ;Test for Trident
mov al,0bh
out dx,al
inc dl
in al,dx
and al,0fh
cmp al,06h
ja notri
cmp al,2
jb notri
bkadr trident
mov [bksize],64 ; 64k bank size
cmp al,3
jb no89
mov [t8900],1
mov dx,3d5h
mov al,1fh
out dx,al
inc dx
in al,dx
and al,3
cmp al,1
jb notmem
mov [vgamem],512
je notmem
mov [vgamem],1024
notmem: jmp fini
no89: mov [vgamem],512
jmp fini
notri: mov ax,6f00h ;Test for Video 7
xor bx,bx
cld
int 10h
cmp bx,'V7'
jnz nov7
bkadr video7
mov [bksize],64 ; 64k bank size
mov ax,6f07h
cld
int 10h
and ah,7fh
cmp ah,1
jbe skp2
mov [vgamem],512
skp2: cmp ah,3
jbe skp3
mov [vgamem],1024
skp3: jmp fini
nov7: mov dx,3d4h ;Test for GENOA GVGA
mov ax,032eh ;check for Herchi Register
call _isport2
jnz nogn
mov dx,3c4h ;check for memory segment register
mov ax,3f06h
call _isport2
jnz nogn
bkadr genoa
mov [bksize],64 ; 64k bank size
mov [vgamem],512
jmp fini
nogn: call _cirrus ;Test for Cirrus
cmp [cirrus],0
je noci
jmp fini
noci: mov dx,3ceh ;Test for Paradise
mov al,9 ;check Bank switch register
out dx,al
inc dx
in al,dx
dec dx
or al,al
jnz nopd
mov ax,50fh ;turn off write protect on VGA registers
out dx,ax
mov dx,offset _paradise
mov cx,1
call _chkbk
jc nopd ;if bank 0 and 1 same not paradise
bkadr paradise
mov [bksize],4 ; 4k bank size
mov dx,3ceh
mov al,0bh ;512k detect from Bob Berry
out dx,al
inc dx
in al,dx
test al,80h ;if top bit set then 512k
jz nop512
mov [vgamem],512
nop512: jmp fini
nopd: mov ax,5f00h ;Test for Chips & Tech
xor bx,bx
cld
int 10h
cmp al,5fh
jnz noct
bkadr chipstech
mov [bksize],16 ; 16k bank size
cmp bh,1
jb skp4
mov [vgamem],512
skp4: jmp fini
noct: mov ch,0
mov dx,3d4h ;check for Tseng 4000 series
mov ax,0f33h
call _isport2
jnz not4
mov ch,1
mov dx,3bfh ;Enable access to extended registers
mov al,3
out dx,al
mov dx,3d8h
mov al,0a0h
out dx,al
jmp short yes4
not4: mov dx,3d4h ;Test for Tseng 3000 or 4000
mov ax,1f25h ;is the Overflow High register there?
call _isport2
jnz nots
mov al,03fh ;bottom six bits only
jmp short yes3
yes4: mov al,0ffh
yes3: mov dx,3cdh ;test bank switch register
call _isport1
jnz nots
bkadr tseng
mov [bksize],64 ; 64k bank size
cmp ch,0
jnz t4mem
mov [vgamem],512
jmp fini
t4mem: mov dx,3d4h ;Tseng 4000 memory detect 1meg
mov al,37h
out dx,al
inc dx
in al,dx
test al,1000b ;if using 64kx4 RAMs then no more than 256k
jz nomem
and al,3
cmp al,1 ;if 8 bit wide bus then only two 256kx4 RAMs
jbe nomem
mov [vgamem],512
cmp al,2 ;if 16 bit wide bus then four 256kx4 RAMs
je nomem
mov [vgamem],1024 ;full meg with eight 256kx4 RAMs
nomem: bkadr tseng4
mov [bksize],64 ; 64k bank size
jmp fini
nots: mov dx,3ceh ;Test for Above A or B chipsets
mov ax,200fh
out dx,ax
inc dx
nojmp
in al,dx
cmp al,21h
jz verb
cmp al,20h
jnz noab
bkadr aheada
mov [bksize],64 ; 64k bank size
mov [vgamem],512
jmp fini
verb: bkadr aheadb
mov [bksize],64 ; 64k bank size
mov [vgamem],512
jmp fini
noab: mov dx,3c4h ;Test for AcuMos chipsets
mov ax,0006h ;disable extended registers
out dx,ax
mov ax,0ff09h
call _isport2 ;is scratchpad at index 9 writeable ?
jz noacu
mov ax,0ff0ah
call _isport2 ;is scratchpad at index 10 writable ?
jz noacu
mov ax,1206h
out dx,ax
mov ax,0ff09h
call _isport2
jnz noacu
mov ax,0ff0ah
call _isport2
jnz noacu
mov dx,offset _acumos
mov cx,1
call _chkbk
jc noacu ;if bank 0 and 1 same not acumos
bkadr acumos
mov [bksize],4 ; 4k bank size
mov dx,3c4h
mov al,0ah
out dx,al
inc dx
in al,dx ;get scratchpad index 10
and al,3
cmp al,1
jb noamem
mov [vgamem],512
cmp al,2
jb noamem
mov [vgamem],1024
cmp al,3
jb noamem
mov [vgamem],2048
noamem: jmp short fini
noacu: mov dx,3deh ;Test for Oak Technology
mov ax,0ff11h ;look for bank switch register
call _isport2
jnz nooak
bkadr oaktech
mov [bksize],64 ; 64k bank size
mov al,0dh
out dx,al
inc dx
nojmp
in al,dx
test al,11000000b
jz no4ram
mov [vgamem],512
test al,01000000b
jz no4ram
mov [vgamem],1024
no4ram: jmp short fini
nooak: jmp short nos3
bkadr s3vga
mov [bksize],64 ; 64k bank size
mov [vgamem],1024
jmp short fini
nos3: cmp [vesa],0
jz nosvga
mov [vgamem],2048
jmp short fini
nosvga: mov si,0
fini: mov ax,si
mov [retval],ax
ret
whichvga endp
_cirrus proc near
mov dx,3d4h ; assume 3dx addressing
mov al,0ch ; screen a start address hi
out dx,al ; select index
inc dx ; point to data
mov ah,al ; save index in ah
in al,dx ; get screen a start address hi
xchg ah,al ; swap index and data
push ax ; save old value
push dx ; save crtc address
xor al,al ; clear crc
out dx,al ; and out to the crtc
mov al,1fh ; Eagle ID register
dec dx ; back to index
out dx,al ; select index
inc dx ; point to data
in al,dx ; read the id register
mov bh,al ; and save it in bh
mov cl,4 ; nibble swap rotate count
mov dx,3c4h ; sequencer/extensions
mov bl,6 ; extensions enable register
ror bh,cl ; compute extensions disable value
mov ax,bx ; extensions disable
out dx,ax ; disable extensions
inc dx ; point to data
in al,dx ; read enable flag
or al,al ; disabled ?
jnz exit ; nope, not an cirrus
ror bh,cl ; compute extensions enable value
dec dx ; point to index
mov ax,bx ; extensions enable
out dx,ax ; enable extensions
inc dx ; point to data
in al,dx ; read enable flag
cmp al,1 ; enabled ?
jne exit ; nope, not an cirrus
mov [cirrus],1
mov word ptr [bankadr],offset _nobank
if @Codesize
mov word ptr [bankadr+2],seg _nobank
endif
exit: pop dx ; restore crtc address
dec dx ; point to index
pop ax ; recover crc index and data
out dx,ax ; restore crc value
ret
_cirrus endp
_chkbk proc near ;bank switch check routine
mov di,0b800h
mov es,di
xor di,di
mov bx,1234h
call _gochk
jnz badchk
mov bx,4321h
call _gochk
jnz badchk
clc
ret
badchk: stc
ret
_chkbk endp
calldx macro
if @Codesize
push cs
endif
call dx
endm
_gochk proc near
push si
mov si,bx
mov al,cl
calldx
xchg bl,es:[di]
mov al,ch
calldx
xchg bh,es:[di]
xchg si,bx
mov al,cl
calldx
xor bl,es:[di]
mov al,ch
calldx
xor bh,es:[di]
xchg si,bx
mov al,ch
calldx
mov es:[di],bh
mov al,cl
calldx
mov es:[di],bl
mov al,0
calldx
or si,si
pop si
ret
_gochk endp
_isport2 proc near ;check for valid indexed i/o port, al is index, ah is bit mask
push bx
mov bx,ax
out dx,al
mov ah,al
inc dx
in al,dx
dec dx
xchg al,ah
push ax
mov ax,bx
out dx,ax
out dx,al
mov ah,al
inc dx
in al,dx
dec dx
and al,bh
cmp al,bh
jnz noport
mov al,ah
mov ah,0
out dx,ax
out dx,al
mov ah,al
inc dx
in al,dx
dec dx
and al,bh
cmp al,0
noport: pop ax
out dx,ax
pop bx
ret
_isport2 endp
_isport1 proc near ;check for valid i/o port, al is bit mask
mov ah,al
in al,dx
push ax
mov al,ah
out dx,al
in al,dx
and al,ah
cmp al,ah
jnz noport
mov al,0
out dx,al
in al,dx
and al,ah
cmp al,0
noport: pop ax
out dx,al
ret
_isport1 endp
end