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# Program that reads a binary number, reverse its bit pattren and display it.

Posted By: Easy Tutor     Category: Assembly Language     Views: 5046

## Code for Program that reads a binary number, reverse its bit pattren and display it. in Assembly Language

``` .MODEL SMALL
.STACK 100H

.DATA
PROMPT_1  DB  'Enter the binary number (max 8-bit) : \$'
PROMPT_2  DB  0DH,0AH,'The given binary number in reverse order is : \$'

.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

XOR BL, BL                   ; clear BL
MOV CX, 8                    ; initialize loop counter
MOV AH, 1                    ; set input function

@INPUT:                      ; jump label
INT 21H                    ; read a digit
CMP AL, 0DH                ; compare digit with carriage return
AND AL, 0FH                ; convert ascii to decimal code
SHL BL, 1                  ; rotate BX to left by 1 bit
OR BL, AL                  ; set the LSB of BX with input

@END:                        ; jump label

MOV AL, BL                   ; copy BL into AL
MOV CX, 8                    ; initialize loop counter

@LOOP:                       ; loop label
SHL AL, 1                  ; shift AL to left by i bit
RCR BL, 1                  ; rotate BL right through carry

LEA DX, PROMPT_2             ; load and display PROMPT_2
MOV AH, 9
INT 21H

MOV CX, 8                    ; initialize loop counter
MOV AH, 2                    ; set output function

@OUTPUT:                     ; jump label
SHL BL, 1                  ; shift left BL by 1 bit

MOV DL, 31H              ; set DL=1

@ZERO:                     ; jump label
MOV DL, 30H              ; set DL=0

@DISPLAY:                  ; jump label
INT 21H                  ; display digit

MOV AH, 4CH                  ; return control to DOS
INT 21H
MAIN ENDP
END MAIN

;**************************************************************************;
;**************************************************************************;
;------------------------------  THE END  ---------------------------------;
;**************************************************************************;
;**************************************************************************;
```
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 Easy Tutor author of Program that reads a binary number, reverse its bit pattren and display it. is from United States. Easy Tutor says Hello Friends,I am Free Lance Tutor, who helped student in completing their homework. I have 4 Years of hands on experience on helping student in completing their homework. I also guide them in doing their final year projects.I have share many programs on this website for everyone to use freely, if you need further assistance, than please contact me on easytutor.2ya [at the rate] gmail [dot] comI have special discount scheme for providing tutor services. I am providing tutor service to students from various contries, currently most of my students are from United States, India, Australia, Pakistan, Germany, UK and Canada. I am also here to expand my technical network to receive more opportunity in my career, make friends to help them in resolving their technical problem, learn and share my knowledge, If you like to be my friend, Please send me friend request.Thanks,Happy Programming :) View All Articles

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