home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Graphics Programming Black Book (Special Edition)
/
BlackBook.bin
/
disk1
/
zoa
/
zen_list.exe
/
LST9-24.ASM
< prev
next >
Wrap
Assembly Source File
|
1990-02-15
|
893b
|
39 lines
;
; *** Listing 9-24 ***
;
; Performs binary-to-ASCII conversion of a byte value
; by using AAM.
;
jmp Skip
;
ResultString db 3 dup (?)
ResultStringEnd label byte
db 0 ;a zero to mark the string end
;
Skip:
BYTE_VALUE=0
call ZTimerOn
rept 100
std ;make STOSB decrement DI
mov ax,ds
mov es,ax ;for STOSB
mov bl,'0' ;used for converting to ASCII
mov di,offset ResultStringEnd-1
mov al,BYTE_VALUE
aam ;put least significant decimal
; digit of BYTE_VALUE in AL,
; other digits in AH
add al,bl ;make it an ASCII digit
stosb ;save least significant digit
mov al,ah
aam ;put middle decimal digit in AL
add al,bl ;make it an ASCII digit
stosb ;save middle digit
;most significant decimal
; digit is in AH
add ah,bl ;make it an ASCII digit
mov [di],ah ;save most significant digit
BYTE_VALUE=BYTE_VALUE+1
endm
call ZTimerOff