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Games of Daze
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Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso
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lst11-5.asm
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Assembly Source File
|
1990-02-15
|
541b
|
28 lines
;
; *** Listing 11-5 ***
;
; Sets the high bit of every element in a byte
; array using LODSB and STOSB.
;
jmp Skip
;
;
ARRAY_LENGTH equ 1000
ByteArray db ARRAY_LENGTH dup (?)
;
Skip:
call ZTimerOn
mov si,offset ByteArray ;point to the array
mov di,ds ; as both source and
mov es,di ; destination
mov di,si
mov cx,ARRAY_LENGTH
mov ah,80h ;bit pattern to OR
cld
SetHighBitLoop:
lodsb ;get the next byte
or al,ah ;set the high bit
stosb ;save the byte
loop SetHighBitLoop
call ZTimerOff