How to convert Binary to Gray conversion

Binary to Gray conversion

 

Write a Program for Binary to Gray conversion in Assembly language . Algorithm for Binary-Gray conversion is given below and it can be easily implemented by this algorithm .

Algorithm for Binary to Gray conversion

 

Step I : Get the number whose gray code equivalent is to be found.

Step II : Add number with itself.

Step III : XOR this added result with the original number.

Step IV : Shift the XOR ed number by 1 bit position to the right to get the Gray equivalent.

Step V : Display the result.

Step VI : Stop.

Program for Binary to Gray conversion 

.model small  
 .data            
 a db 0AH  
 .code  
      mov      ax, @data           ; Initialize data section  
      mov      ds, ax  
      mov      al, a               ; Load number1 in al  
      mov      bl, al              ; get the number in bl also  
      mov      ah, 00h             ; ah=00  
      add      ax, ax              ; add contents of ax with itself   
      xor      bx, ax              ; xor the added contents with number itself  
      ror      bx, 01h             ; roll by 1 bit to right to get gray equivalent  
      mov      ax, bx              ; copy result to ax also  
      mov      ch, 02h             ; Count of digits to be displayed  
      mov      cl, 04h             ; Count to roll by 4 bits  
      mov      bh, al              ; Result in reg bh  
 l2:     rol      bh, cl           ; roll bl so that msb comes to lsb   
      mov      dl, bh              ; load dl with data to be displayed  
      and      dl, 0fH             ; get only lsb  
      cmp      dl, 09              ; check if digit is 0-9 or letter A-F  
      jbe      l4  
      add      dl, 07              ; if letter add 37H else only add 30H  
 l4:     add      dl, 30H  
      mov      ah, 02              ; Function 2 under INT 21H (Display character)  
      int      21H  
      dec      ch                  ; Decrement Count  
      jnz      l2  
      mov      ah, 4cH             ; Terminate Program  
      int      21H  
 end

 

How to Run this Program

 

For Running this program you should have installed Tasm on you computer .

C:\programs>tasm bin-gray.asm

Turbo Assembler Version 3.0 Copyright (c) 1988, 1991 Borland International

Assembling file: bin-gray.asm

Error messages: None

Warning messages: None

Passes: 1

Remaining memory: 438k

C:\programs>tlink bin-gray.obj

Turbo Link Version 3.0 Copyright (c) 1987, 1990 Borland International

Warning: No stack

C:\programs>bin-gray

0F