A85: 16 bit registers...

To: <assembly-85@lists.ticalc.org>
Subject: A85: 16 bit registers...
From: "Michael Turitzin" <stevet@thevision.net>
Date: Tue, 29 Dec 1998 16:29:59 -0800
Delivered-To: assembly-85-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-85@lists.ticalc.org


I'm VERY new(about 2 days) to ti-85 assembly code, so excuse this newbie
question.  I'm trying to check if a 16 bit register( bc ) is 0, but I can't
find a way to do it other than checking b and then c for 0 values.  "dec"
seems to only set z if the register is 8 bit, and most everything else I can
find that sets this value uses A and needs an 8 bit register as the
"parameter".  This is the code I am currently using:

 dec      bc
 ld       a, 0
 cp       b
 jr       nz, FlashLoop
 cp       c
 jr       nz, FlashLoop
 jr       MainLoop

Is there a better way of checking for a zero value in bc?

MaNiAc

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Re: A85: 16 bit registers...

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