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HEXDEC.A
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Text File
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2000-06-30
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809b
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53 lines
;HEX TO DEC ROUTINE FOR 8086/88
;
; INPUT: DX=HEX, [BX]=BUFFER
; OUTPUT: [BX]=DECIMAL, CX,AL DESTROYED
;
MODULE "HEXDEC"
;
LOC Code#
;
HEXDEC::
MOV LEAD,=0
MOV CX,=-10000
CALL MAKDEC
MOV CX,=-1000
CALL MAKDEC
MOV CX,=-100
CALL MAKDEC
MOV CX,=-10
CALL MAKDEC
MOV CX,=-1
CALL MAKDEC
RET
;
MAKDEC: MOV AH,=-1
PUSH BX
MDECLP: PUSH DX
INC AH
ADD DX,CX
JNC DECD
POP BX
JMPS MDECLP
;
DECD: POP DX
POP BX
OR AH,AH
JNZ __S
CMP LEAD,=0
JNZ __S
RET
;
__S: MOV AL,='0'
ADD AL,AH
MOV [BX],AL
INC BX
MOV LEAD,AL
RET
;
LOC Data#
;
LEAD: BYTE 0
;
END