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OS/2 Shareware BBS: 11 Util
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11-Util.zip
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QFOS2.ZIP
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QF.ASM
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Assembly Source File
|
1990-12-06
|
450b
|
33 lines
; qf.asm
;
; Change memory refresh rate
;
; Definition file:
; SEGMENTS
; QF_TEXT IOPL
; EXPORTS
; QFSET 1
;
; -- C declaration
; void far pascal QFSET(int refresh);
.model large,pascal
.code
QFSET proc qf:word
cli ; don't allow interrupts now!
mov al,74h
out 43h,al
jmp $+2 ; prefetch flush per IBM
mov ax,qf
out 41h,al
jmp $+2
mov al,0
out 41h,al
sti
ret
QFSET endp
end