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Shareware Compilation 6
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SharewareCD_06.zip
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pcspace
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tridentl.asm
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Assembly Source File
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1993-10-05
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2KB
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71 lines
;Pcspace-screen driver Trident- 16colors
;
;To create a tridentl.drv:
; tasm tridentl
; tlink tridentl
; exe2bin tridentl
; ren tridentl.bin tridentl.drv
;
; Attention: Maximum length of the drv file: 256 Bytes
prog segment para 'code'
assume cs:prog
assume ds:prog
assume ss:prog
assume es:prog
start proc far
; Initialize entry point for video mode
jmp short init
; Set the entry point 64k bank and set the segment address to es
; The bank number has been set in al.
jmp short bank
;parameter for the driver
db 15 ;number of colors-1
;Table of parameters for initialization
;Parametertabelle für Initialisierung
db 12h ;Mode 0: resolution 640*480
db 5bh ;Mode 1: resolution 800*600
db 5fh ;Mode 2: resolution 1024*768
db -1 ;Mode 3: resolution 1280*960 (no such resolution)
db -1 ;Mode 4: resolution 1280*1024 (no such resolution)
db "Trident 16colors" ;Identification text for SETUP
db 0 ;length can be adjustable
;Initialize video mode
;Used registers: ax,bx
;al has been set to the value of the parameter table
;No such resolution (Par.-1) has been captured already.
init: xor ah,ah
int 10h
retf
;set video bank
;Used registers: ax,dx,es
bank: mov dx,0a000h ;segmentadr. video memory
mov es,dx
mov ah,al
mov dx,03c4h
mov al,0bh
out dx,al
inc dx
in al,dx
xor ah,2
mov al,0eh
dec dx
out dx,ax
retf
start endp
prog ends
end start