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ATIULTRA.ASM
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Assembly Source File
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1994-02-23
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13KB
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453 lines
;--------------------------------------------------------------------------
; This is file ATIULTRA.ASM
;
; Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
; Copyright (C) 1992 Csaba Biegl, 820 Stirrup Dr, Nashville, TN 37221
;
; 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.
;--------------------------------------------------------------------------
_TEXT segment byte public 'CODE'
_TEXT ends
DGROUP group _TEXT,_DATA,_BSS
assume cs:_TEXT,ds:DGROUP
_DATA segment word public 'DATA'
d@ label byte
d@w label word
_DATA ends
_BSS segment word public 'BSS'
b@ label byte
b@w label word
_BSS ends
_TEXT segment byte public 'CODE'
assume cs:_TEXT,ds:DGROUP
include grdriver.inc
;--------------------------------------------------------------------------
; 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_256K+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 132
Max_TH equ 44
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 + 00400h
dw 80, 50, 16, 003h + 00100h
dw 132, 25, 16, 023h + 00000h
dw 132, 28, 16, 023h + 00400h
dw 132, 44, 16, 033h + 00000h
dw 132, 50, 16, 023h + 00100h
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
begin_8514_modes label word
dw 640, 480, 256, 000h + 00300h ; use 8514 mode
dw 1024, 768, 256, 001h + 00300h ; use 8514 mode
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, CX, DX, 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_50row_mode_set
dw offset VGA_MODE_X_set
dw offset IBM_8514_mode_set
dw offset VGA_28row_mode_set
;
; Routine to set up VGA 50 row mode
; interface is described above
;
VGA_50row_mode_set proc near
call near ptr disable_8514A
mov ax,WORD PTR [di+6] ; get base mode number
xor ah,ah
int 10h
xor bx,bx
mov ax,1112h ; load 8x8 font
int 10h
ret
VGA_50row_mode_set endp
;
; Routine to set up VGA 28 row mode
; interface is described above
;
VGA_28row_mode_set proc near
call near ptr disable_8514A
mov ax,WORD PTR [di+6] ; get base mode number
xor ah,ah
int 10h
xor bx,bx
mov ax,1111h ; load 8x14 font
int 10h
ret
VGA_28row_mode_set endp
;
; Routine to set up VGA 256 color plane mode ("MODE X")
; interface is described above
; TO BE COMPLETED
;
VGA_MODE_X_set proc near
mov bx,mode_W
or bx,GRD_8_X_PLANES
ret
VGA_MODE_X_set endp
;
; Routine to set up 8514A 256 color mode
; interface is described above
;
IBM_8514_mode_set proc near
mov al,BYTE PTR [di+6]
xor ah,ah
push ax
call near ptr setup_8514A_256_color_mode
pop ax
mov bx,GRD_NEW_DRIVER+GRD_8514A+GRD_8_PLANES
ret
IBM_8514_mode_set endp
;--------------------------------------------------------------------------
; DRIVER INIT ROUTINE
; called once after the driver is loaded
; may do one or more of the followings:
; - check for proper board type
; - check amount of RAM on board, and:
; -- update word in header to reflect correct amount
; -- disable modes in the tables for which there is not enough RAM
; - check for special equipment (HiColor DAC, etc...)
;
; Entry: nothing
;
; Exit: AX=status:
; non-zero: OK,
; 0: something went wrong (e.g. wrong adapter, etc..)
; BX,CX,DX may be trashed
;
; NOTE: This runs in real mode, but don't mess with the segment registers.
;--------------------------------------------------------------------------
driver_init_routine proc far
push ds
mov ax,cs
mov ds,ax
call near ptr check_8514A ; test for 8514A
or ax,ax
jne have_8514A
mov bx,offset begin_8514_modes
mov WORD PTR [bx+6],062h ; use SVGA mode for 640x480x256
mov WORD PTR [bx+14],0ffh ; invalidate 1024x768x256
have_8514A:
mov ax,1
pop ds
ret
driver_init_routine endp
;--------------------------------------------------------------------------
; MODE SET ROUTINE
; sets up a text or graphics mode as close as possible to the one
; reguested by the user with regard to number of colors and size.
;
; Entry: AX=mode selection
; 0 = 80x25 text
; 1 = default text
; 2 = text CX cols by DX rows
; 3 = biggest text
; 4 = 320x200 graphics
; 5 = default graphics
; 6 = graphics CX width by DX height
; 7 =