Re: A86: PUSHOP1 and PXOFF

To: assembly-86@lists.ticalc.org
Subject: Re: A86: PUSHOP1 and PXOFF
From: Joshua J Seagoe <rabidcow@juno.com>
Date: Wed, 10 Feb 1999 19:16:47 -0800
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org

there are two special stacks for pushing/popping ops which are located on
ram page 1.  there's a bunch of rom calls for this.

xor will invert the pixel
to turn it off, invert the mask with xor $ff, then and it to the screen

-josh

On Mon, 8 Feb 1999 21:17:15 EST Jeanne9005@aol.com writes:
>
>is there a way to push the OPs?  cuz in zDist, I saw something about 
>_PUSH_OP1
>or something...also, if i want to turn off just one pixel, do i use a 
>pixel on
>routine and use xor instead of or / and ?  thanks
>
>Glen
>
>

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