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From: STRAUS@applelink.apple.com (Jim Straus)
Newsgroups: comp.sys.laptops
Subject: Re: Atari Portfolio
Message-ID: <6257@internal.Apple.COM>
Date: 18 Jan 90 22:36:47 GMT
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 14
References:<Jan.12.22.23.14.1990.9453@topaz.rutgers.edu> <7696@sdcsvax.UCSD.Edu> <12613@udenva.cair.du.edu> <16729@cc.usu.edu> <7712@sdcsvax.UCSD.Edu>

In article <7712@sdcsvax.UCSD.Edu> butcher@sdcsvax.UCSD.Edu (David Butcher 
) writes:
>    Have you tried it? It doesn't work on the Portfolio at least the one 
that
> Atari gave to me. Ansi ESC codes don't work either. SInce Atari chose a
> smaller screen for it's Portfolio the normal BIOS writing does not work 
as
> expected. 

I have tried it.  The IBM ROM BIOS call SetPixel works just fine.  (GetPixel 
doesn't though, but you can retrieve the value by looking in the RAM screen 
image).  Do note that you have to kick the screen into graphics mode first.  I 
have written a small tetris like game using the graphics and it is speedy 
enough for that.