Re: A86: Sprite XOR

Re: A86: Sprite XOR

• To: assembly-86@lists.ticalc.org
• Subject: Re: A86: Sprite XOR
• From: "A. El-Helw" <ahmed3@worldnet.att.net>
• Date: Thu, 11 Sep 1997 07:29:39 -0400
• In-Reply-To: <34175DEC.2D62E296@polymail.calpoly.edu>
• References: <3.0.3.32.19970910223418.006af528@postoffice.worldnet.att.net>
• Reply-To: assembly-86@lists.ticalc.org

So,  if I wanted to make an XOR routine, just add those three lines where I
call the sprite ?  And is there anything else I have to do?  Also, what is
the # command for call _dispop1a ?

						Ahmed

>this is the basic idea of what you want to do...
>
>HL = VidMem offset
>DL = Pointer to Sprite
>
>  ld a,(de) ; get byte from pic
>  xor (hl) ; xor it with what's at the screen already
>  ld (hl),a ; save XORed value in vid memory
>--
>Trent Lillehaugen
>Computer Engineering Major
>California Polytechnic University, San Luis Obispo
><tllilleh@polymail.calpoly.edu>
>
>
>
Ahmed El-Helw
ahmed3@worldnet.att.net
http://ahmed1.home.ml.org
The Ultimate TI-83/6 Site!

A member of The TI-Files
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• Re: A86: Sprite XOR
• From: Trent Lillehaugen <tllilleh@polymail.cpunix.calpoly.edu>

• A86: Sprite XOR
• From: "A. El-Helw" <ahmed3@worldnet.att.net>
• Re: A86: Sprite XOR
• From: Trent Lillehaugen <tllilleh@polymail.cpunix.calpoly.edu>

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