Re: A83: ti compiler....hl to a question
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Re: A83: ti compiler....hl to a question
It doesn't. Other than that (and other than a few minor flags) the code
description of LDIR is accurate though.
-Dan Englender
----- Original Message -----
From: "D Weiss" <dwedit@hotmail.com>
To: <assembly-83@lists.ticalc.org>
Sent: Wednesday, November 08, 2000 6:32 PM
Subject: 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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