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Index > Macroinstructions > Need scan_num macro

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log(21



Joined: 09 Jun 2006
Posts: 6
log(21
I need a macro that can take a value from a user and convert it into binary.

EX:

PROMPT: 124

>>>124 is then stored in the CX register (or some other register)

Thanks
Post 13 Aug 2006, 02:20
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
why macro? i believe you want procedure Wink
Post 13 Aug 2006, 11:09
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cod3b453



Joined: 25 Aug 2004
Posts: 619
cod3b453
Well heres a simple example:
Code:
    prompt rb 8 ; prompt string here, null terminated

    str2lng:

        push ax bx

        xor ax,ax
        xor bx,bx
        xor cx,cx

        mov si,prompt
        mov al,[si]

    @@:

        sub al,'0'
        add cx,ax

        inc si

        mov al,[si]

        cmp al,0
        je @f

        shl cx,1
        mov bx,cx
        shl cx,2
        add cx,bx
        jmp @b

    @@:

        pop bx ax
        ret
    

HTH
Post 13 Aug 2006, 19:22
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