Re: A83: ti compiler....hl to a question
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Re: A83: ti compiler....hl to a question
Does it touch register A? I thought it didn't...
>From: Harper Maddox <gte172i@prism.gatech.edu>
>Reply-To: assembly-83@lists.ticalc.org
>To: assembly-83@lists.ticalc.org
>Subject: Re: A83: ti compiler....hl to a question
>Date: Wed, 08 Nov 2000 18:20:33 -0500
>
>
>no offense, but if you don't know how LDIR works, then maybe you shouldn't
>attempt to write a compiler. LDIR is one of the most commonly used
>opcodes, and it is essential to many optimizations.
>
>but, to explain...
>LDIR is equivalent to:
>
>label:
> ld a,(hl)
> ld (de),a
> inc hl
> inc de
> dec bc
> ld a,b
> or c
> jr nz,label
>
>
>
>
>At 02:47 PM 11/8/00 -0500, you wrote:
>
>>Um...ok i think i get it...ok now before i get to indepth with this
>>program....i was wondering...how exactly does a ldir work? does it go up
>>to
>>the last line? the last label? what? and does it increment a?
>
>
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