Path: utzoo!utdoe!generic!pnet91!taob
From: taob@pnet91.cts.com (Brian Tao)
Newsgroups: comp.sys.apple2
Subject: Re: Super-Hi-Res Screen Picture Format
Message-ID: <539@generic.UUCP>
Date: 25 Feb 91 16:15:06 GMT
Sender: root@generic.UUCP
Organization: People-Net [pnet91], Etobicoke, ON
Lines: 15

From zane@ddsw1.MCS.COM (Sameer Parekh):

>         What is the format for SHR Screen Images?  (Uncompressed.)
> I'd like to write a UNIX program (which would be quicker than using
> my //gs.) to save an image to a file, and it seems like the screen
> images would be the easiest because they are uncompressed. 

    Uncompressed screen files are exactly 32K long (at least with the current
GS video modes) and they don't have any special headers or format.  It's a
straight binary dump starting at memory location $E12000 to $E19FFF (again,
with the way GS memory is set up right now).  Bitmap (two pixels per byte in
320 mode) + scan line control bytes (SCB's) + color lookup tables (CLUT's).

Brian T. Tao   *B-) |  t569taob@bluffs.scar.utoronto.ca  | "Though this be
U of Metro Toronto  |               - or -               |  madness, yet there
Scarberia, ON       |        taob@pnet91.cts.com         |  is method in 't."


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