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ATI_16MD.ASM
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Assembly Source File
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1994-05-14
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16KB
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578 lines
;--------------------------------------------------------------------------
; This is file ATI_16M.ASM, Version 0.3
;
; Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
; Copyright (C) 1992 Csaba Biegl, 820 Stirrup Dr, Nashville, TN 37221
; Copyright (C) 1994 Bernhard Schwall (ATI-parts)
;
; This file is distributed under the terms listed in the document
; "copying.dj", available from DJ Delorie at the address above.
; A copy of "copying.dj" should accompany this file; if not, a copy
; should be available from where this file was obtained. This file
; may not be distributed without a verbatim copy of "copying.dj".
;
; This file is distributed WITHOUT ANY WARRANTY; without even the implied
; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;--------------------------------------------------------------------------
;
; changes:
;
; Version 0.1: 07.02.1994
; first release
;
; Version 0.2: 09.02.1994
; fixed the byte/line to really needed size, so 640x480x16.7mio
; will fit in 1MB-Ram
; clear 2.MB when using 16.7mio. colormode
;
; Version 0.3: 16.02.1994
; return the right number of planes
; changed 24 bit mode to BGR-order
; so disp160 will run in truecolor
;
; Version 0.31: 31.03.1994
; set screenwidth to original value when switching to textmode
; changed the standard setup: disable memory aperture
; changed grdriver.inc to new verson shipped with LIBGRX 1.03 which
; now uses disp180 too.
;
;--------------------------------------------------------------------------
include grdriver.inc
cseg segment byte public 'code'
assume cs:cseg, ds:cseg, es:cseg, ss:nothing
;--------------------------------------------------------------------------
; DRIVER HEADER
; The following entries MUST match the structure and constant
; declarations in the file 'grdriver.h' of the GRX graphics library
; The mode word should contain the following bitfields:
; - the GRD_NEW_DRIVER bit set for any new format driver
; - the adapter type field should be specified
; - the memory size field should be specified
; - the paging mode field should be specified
; The mode set routine will OR in the plane bitfield as it will
; change when different color number modes are requested.
;--------------------------------------------------------------------------
dw offset mode_set_routine
dw offset paging_routine
mode_W dw GRD_NEW_DRIVER+GRD_VGA+GRD_1024K+GRD_RW_64K
;
; The 'def_xx' fields are filled in by go32 from the corresponding
; fields of the 'GO32' environment variable
;
def_tw dw 80 ; text width
def_th dw 25 ; text height
def_gw dw 640 ; graphics width
def_gh dw 480 ; graphics height
def_nc dw 16 ; graphics colors
dw offset driver_init_routine
dw offset text_mode_table
dw offset graphics_mode_table
;
; Biggest text and graphics sizes
;
Max_TW equ 80
Max_TH equ 50
Max_GWn equ 800 ; non interlaced!!!
Max_GHn equ 600
Max_GW equ 1024 ; may be interlaced
Max_GH equ 768
;--------------------------------------------------------------------------
; TABLE OF SUPPORTED TEXT MODES
; - keep sorted by size
; - end with an all 0 entry
; - BIOS field = 0xff disables it
; - fields:
; width, height, colors, BIOS#+ setup_procedure_index*256
;--------------------------------------------------------------------------
text_mode_table label word
dw 80, 25, 2, 007h + 00000h
dw 40, 25, 16, 001h + 00000h
dw 80, 25, 16, 003h + 00000h
dw 80, 28, 16, 003h + 00100h
dw 80, 50, 16, 003h + 00200h
dw 132, 25, 16, 023h + 00000h
dw 132, 28, 16, 023h + 00100h
dw 132, 44, 16, 033h + 00000h
dw 0, 0, 0, 000h + 00000h
;--------------------------------------------------------------------------
; TABLE OF SUPPORTED GRAPHICS MODES
; - keep sorted first by colors then by size
; - end with an all 0 entry
; - BIOS field = 0xff disables it
; - fields:
; width, height, colors, BIOS#+ setup_procedure_index*256
;--------------------------------------------------------------------------
graphics_mode_table label word
dw 320, 200, 16, 00dh + 00000h
dw 640, 200, 16, 00eh + 00000h
dw 640, 350, 16, 010h + 00000h
dw 640, 480, 16, 012h + 00000h
dw 800, 600, 16, 054h + 00000h
dw 1024, 768, 16, 055h + 00000h
dw 320, 200, 256, 013h + 00000h
dw 640, 400, 256, 061h + 00000h
dw 640, 480, 256, 062h + 00000h
dw 800, 600, 256, 063h + 00000h
dw 1024, 768, 256, 064h + 00000h
dw 640, 480, 32768, 062h + 00300h
dw 800, 600, 32768, 063h + 00300h
dw 1024, 768, 32768, 064h + 00300h
dw 640, 480, 49168, 062h + 00310h ; 49168 = 0xc000+16
dw 800, 600, 49168, 063h + 00310h
dw 1024, 768, 49168, 064h + 00310h
dw 640, 480, 49176, 062h + 00380h ; 49176 = 0xc000+24
dw 800, 600, 49176, 063h + 00380h
dw 0, 0, 0, 000h + 00000h
;--------------------------------------------------------------------------
; TABLE OF SPECIAL SETUP PROCEDURES
; You may need such procedures for:
; -- reloading fonts on standard EGA or VGA for
; higher resolution text modes
; -- enable HiColor mode of some Super VGAs
; -- Handle the parameter passing conventions of the VESA BIOS
; -- put VGA into 256 color plane mode ("MODE X")
; -- etc...
; There should be one entry in the table for every non-zero
; 'setup_procedure_index' in the text and graphics mode tables.
; The first entry in the table belongs to index 100h, and so on.
; The special setup procedure is invoked via a near call.
;
; Entry: DI=address of the mode record from the text or graphics
; table to set up.
;
; Exit: Adapter configured
; BX=driver mode word as it should be returned by the mode set
; routine. Typically it involves picking up the mode word
; from the header and OR-ing in the appropriate bitplane mode
; bitfield. (This is not needed for text modes)
; AX, SI can be trashed, PRESERVE DI!!!!
;
; NOTE: This runs in real mode, but don't mess with the segment registers.
;--------------------------------------------------------------------------
special_setup_table label word
dw offset VGA_28row_mode_set
dw offset VGA_50row_mode_set
dw offset ATI_setup ; setup 15, 16 and 24 bit
;
; Routine to set up VGA 50 row mode
; interface is described above
;
VGA_50row_mode_set proc near
mov ax,03h ; set 80x25 mode
int 10h
xor bx,bx
mov ax,1112h ; load 8x8 font
int 10h
ret
VGA_50row_mode_set endp
VGA_28row_mode_set proc near
mov ax,WORD PTR [di+6] ; set 25 line mode
xor ah,ah
int 10h
xor bx,bx
mov ax,1111h ; load 8x14 font
int 10h
ret
VGA_28row_mode_set endp
; Routine to initialize 16.7milion color mode on ATI GU+ GUpro
ATI_Accell db 0
ATI_lo dw 0
ATI_hi dw 0
ATI_setup proc near
mov ax,word ptr [di+6]
and ax,006fh
int 10h ; switch to graphicsmode
mov cx,ax
and ax,006fh
cmp ax,63h
jl No2MB
mov dx,01ceh ; get old value of ATI2E
mov al,0aeh
out dx,al
inc dx
in al,dx
and al,0f0h
or al,05
out dx,al ; set read/write-bank to 2.MB
mov ax,cx
int 10h ; switch to graphicsmode second time
; to clear 2.MB
mov dx,01ceh ; get old value of ATI2E
mov al,0aeh
out dx,al
inc dx
in al,dx
and al,0f0h
out dx,al ; set read/write-bank to 1.MB
No2MB: mov dx,52eeh
in ax,dx
and ax,007fh
mov cl,7
shl ax,cl
add ax,0c000h
mov ATI_hi,ax
mov ax,0064h
mov ATI_lo,ax ; get Rom-Entry-Point
; select colordepth
mov cl,byte ptr [di+6]
test cl,80h
jz No_888
mov ah,07h ; 888
mov bx,GRD_24_PLANES
push bx
jmp SelRes
No_888: test cl,10h
jz No_565
mov ah,0dh ; 565
mov bx,GRD_16_R_PLANES
push bx
jmp SelRes
No_565: mov ah,05h ; 555
mov bx,GRD_16_PLANES
push bx
; select resolution
SelRes: and cl,6fh
cmp cl,62h
jnz No640
mov al,21h ; 640x480
jmp SetRes
No640: cmp cl,63h
jnz No800
mov al,01h ; 800x600
jmp SetRes
No800: mov al,41h ; 1024x768
SetRes: mov bx,3
call dword ptr [ATI_lo] ; set resolution and colordepth
mov ax,0068h
mov ATI_lo,ax
mov ax,1
call dword ptr [ATI_lo]