[A83] Re: Checking if OP1 is zero...

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Checking if OP1 is zero...
From: Thomas Lutz <caffeine43@netzero.net>
Date: Wed, 18 Jul 2001 11:33:16 -0400
References: <001201c10f61$a7274ea0$ecd16c40@hpcustomer>
Reply-To: assembly-83@lists.ticalc.org


Yeah, that's a ROM call. _ckop1fp0 will check if OP1 is 0 and set the zero flag if it is. It also destroys the 'a' register as well, so push that if you need it.

Andrey Gorlin wrote:

> I am trying to write a function for James Vernon`s Maths Pack, and I need to check if OP1 is zero.  I cannot understand if "_ckop1fp0" does that or something else from reading ASM Guru.  Is that the right ROM call?  If not, what is?

References:

[A83] Checking if OP1 is zero...

From: "Andrey Gorlin" <ag_silver_83p@ameritech.net>

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