Created
April 5, 2015 19:27
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.MODEL SMALL | |
.STACK 100H | |
.DATA | |
PROMPT_1 DB 'Enter the character : $' | |
PROMPT_2 DB 0DH,0AH,'The ASCII code of the given number in binary form is : $' | |
PROMPT_3 DB 0DH,0AH,'The number of 1 bits in ASCII code are : $' | |
.CODE | |
MAIN PROC | |
MOV AX, @DATA ; initialize DS | |
MOV DS, AX | |
LEA DX, PROMPT_1 ; load and display PROMPT_1 | |
MOV AH, 9 | |
INT 21H | |
MOV AH, 1 ; read a character | |
INT 21H | |
XOR BX, BX ; clear BX | |
MOV BL, AL ; move AL to BL | |
LEA DX, PROMPT_2 ; load and display PROMPT_2 | |
MOV AH, 9 | |
INT 21H | |
XOR BH, BH ; clear BH | |
MOV CX, 8 ; initialize loop counter | |
MOV AH, 2 ; set output function | |
@OUTPUT: ; jump label | |
SHL BL, 1 ; shift left BX by 1 bit | |
JNC @ZERO ; jump to label @ZERO if CF=0 | |
INC BH ; increment BH | |
MOV DL, 31H ; set DL=1 | |
JMP @DISPLAY ; jump to label @DISPLAY | |
@ZERO: ; jump label | |
MOV DL, 30H ; set DL=0 | |
@DISPLAY: ; jump label | |
INT 21H ; display digit | |
LOOP @OUTPUT ; jump to label @OUTPUT | |
LEA DX, PROMPT_3 ; load and display the string PROMPT_3 | |
MOV AH, 9 | |
INT 21H | |
OR BH, 30H ; convert the decimal to ascii code | |
MOV AH, 2 ; print the contents of BH | |
MOV DL, BH | |
INT 21H | |
MOV AH, 4CH ; return control to DOS | |
INT 21H | |
MAIN ENDP | |
END MAIN |
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