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Converting hexadimal to binary

August 11, 2006

This is a shorter and lazier version of hex to binary conversion. It displays right away the binary equivalent of a valid hexadecimal and waits user to press enter key to end. Thanks to sir for the convert algo…hehe:) 

check:
    mov ah, 00
    int 16h

    cmp ah, 1ch                               ; scan key for enter key
    je exit

    cmp al, ‘0′
    jb check
    
    cmp al, ‘9′
    ja ucase
    
    sub al, 30h
    call convert
    jmp check

ucase:
    cmp al, ‘A’
    jb check

    cmp al, ‘F’
    ja lcase
    
    sub al, 37h
    
    call convert
    
    jmp check

lcase:
    cmp al, ‘a’
    jb check
    
    cmp al, ‘f’
    ja check
    
    sub al, 57h
    
    call convert

    jmp check
     
exit:
    int 20h
    
loop check

;———————–convert——————————
convert:

    mov ch, 4        ; 4 bits
    mov cl, 3        
    mov bl, al
    
    xxx:
        mov al, bl
        shr al, cl    
        and al, 01    ; bit masking- isolate least bit 0
    
        add al, 30h

        mov ah, 02    ; display binary equivalent
        mov dl, al
        int 21h
    
        dec cl        
        dec ch
    
    jnz xxx
    
    mov dl, ‘ ‘
    int 21h
    ret

Posted by phengpheng at 2:06 pm | permalink

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About Me

A Computer Science graduate who is a fanatic in assembly, java, and j2me programming. Developed BlueVoice system (Direct Voice Communication in Mobile Phones), this system allows mobile users to experience FREE VOICE CALLS

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tinnitus treatment:

thanks You sure do know what your’e talking about. Man, this blog is just great! I cant wait to read more of what youv’e got to say. Im really happy that I came across this when I did because I was really starting

phengpheng:

Haven’t managed my blog for a long time already because I’m so busy now… Sorry to cause you guyz trouble…

Jun Mark:

hoW tO creaTE a PrOGram thAT woULD oUTpuT ascii table???

Jun Mark:

pLZ anSwer mY qUEstions

cutieGurl:

how to convert binary to hexadecimal, decimal and octal?????????please. answer me??????????

mary ann:

kuya, ung binary to decimal converter nyo. mali man? ung sa mga compare mo. ung may 0,9,A,F etc… bad character lumalabaspls rep asap po. tnx

carol:

how to convert decimal to binary to octal and hexadecimal

Galwin:

been here!

galwin:

nice site. hope you could visit mine, too.

pathy:

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ridvan:

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keep up the codes!

phengpheng:

I miss updating this blog… Sana may time and pc ako to learn new stuffs aside from my work…

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pheng:

uy! you’re here again!

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no spamming please :p hehehe joke lang jay.

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