52. CODE CONVERSION IN 8086

ASCII ADJUSTMENT INSTRUCTIONS

CODE SEGMENT

ASSUME CS:CODE

START: MOV AX,31H

ADD AX,39H

AAA

ADD AX,3030H

MOV BL,9

MOV AX,0702H

AAD

DIV BL

MOV AL,5

MOV CL,5

MUL CL

AAM

ADD AX,3030H

MOV AX,38H

SUB AX,31H

AAS

AX,3030H

MOV AH,4CH

INT 21H

CODE ENDS

END START

BINARY TO BCD CONVERSION

DATA SEGMENT

BIN DW 01A9H

BCD DB 2 DUP(0)

DATA ENDS

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START: MOV AX,DATA

MOV DS,AX

MOV AX,BIN

MOV CL,64H

DIV CL

MOV BCD+1,AL

MOV AL,AH

MOV AH,00H

MOV CL,0AH

DIV CL

MOV CL,04

ROR AL,CL

ADD AL,AH

MOV AH,4CH

INT 21H

CODE ENDS

END START

Input: binary--------01A9

Output: bcd------------425

BCD TO BINARY CONVERSION

DATA SEGMENT

BCD DW 27H

BIN DW ?

DATA ENDS

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START: MOV AX,DATA

MOV DS,AX

MOV AX,BCD

AND AX,07H

MOV BX,AX

MOV AX,BCD

AND AX,0F0H

MOV CX,0AH

MUL CX

ADD AX,BX

MOV BIN,AX

MOV AH,4CH

INT 21H

CODE ENDS

END START

Input: BCD-------------27

Output:------------------1B

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