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From: bazyar@ernie (Jawaid Bazyar)
Newsgroups: comp.sys.apple2
Subject: Re: Multi-Colored Text screens
Message-ID: <1991Mar20.000332.1774@m.cs.uiuc.edu>
Date: 20 Mar 91 00:03:32 GMT
References: <9103191801.AA11712@apple.com>
Sender: news@m.cs.uiuc.edu (News Database (admin-Mike Schwager))
Reply-To: bazyar@cs.uiuc.edu (Jawaid Bazyar)
Organization: Mutation Testing Facility, University of Illinois
Lines: 20

In article <9103191801.AA11712@apple.com> TSEMM@ALASKA.BITNET ("Edward M. Moore") writes:
>I've seen some assembly programs which display multi-colors on a text
>screen.  I would like to do a simular thing on my IIGS through basic.
>I know I'm going to have to poke, but I'm not sure what/and where to poke.
>Can anyone lend me assistance?
>Thanks!

   Well, it's more complex than that.  You have to poke every time the
guns gets to a new text line and you want to change colors.   You need 
an assembly routine (BASIC is not even close to being fast enough) to
watch the Y location of the electron gun, or perhaps there's a slightly
better way to read it, but that's the gist of it.
   I would disassemble the GS Phone Toner (a BASIC program) and see how
they set it up, then stick the assembly code in your program.

--
Jawaid Bazyar               |"I'm sure K&R have never heard of Mike." 
Senior/Computer Engineering |
bazyar@cs.uiuc.edu          |"That's okay. I'm sure Mike's never heard of K&R".
   Apple II Forever!        |  (discussion about Orca/C)