A82: Re: somewhat illogical operations :-P


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A82: Re: somewhat illogical operations :-P



 It is possible to set/clear/change pixels using or/and/xor. To see how this
can be done have a look at the graph lib I wrote.

Dines

-----Original Message-----
From: GeradS711@aol.com <GeradS711@aol.com>
To: assembly-82@lists.ticalc.org <assembly-82@lists.ticalc.org>
Date: 24. oktober 1997 05:14
Subject: A82: somewhat illogical operations :-P



>Alrightty then. . .
>If I wanted to write a byte to the display port without changing anything
>would this work.
>call $7F3
>in a,(11h) ; I am not sure if this is legal
>or %0110000 ; what I want to do is to turn bytes 5,6 on and leave all the
>others as they are. I am not sure if this is right. Actually, it probably
>isn't. Is there a way to do this logically, or do you just do set 6 set 5.
.
>
>