Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!daemon
From: daemon@bloom-beacon.MIT.EDU (Mr Background)
Newsgroups: comp.sys.apple
Subject: Apple IIgs SHR fade
Summary: How can I fade a IIgs SHR screen in ProDOS8?
Keywords: fade, IIgs, SHR
Message-ID: <11472@bloom-beacon.MIT.EDU>
Date: 17 May 89 01:17:36 GMT
Reply-To: mhamaoka@athena.mit.edu (Michael T Hamaoka)
Distribution: usa
Organization: Massachusetts Institute of Technology
Lines: 24

From: mhamaoka@athena.mit.edu (Michael T Hamaoka)
Path: athena.mit.edu!mhamaoka

Hi,

   I was playing around a little with my IIgs and assembly
and was wondering if there is a way to fade a screen in (from
black to full screen) then back to black (with fading speed
control) from ProDOS 8.  Ideally, what I would like is a
program that I could run from BASIC.SYSTEM that would load a
$C1 type screen, fade it in, wait for a keypress and fade it
out.

   Could anyone give me hints or tell me where I could find
source code to try to learn how to do this?  I know 6502
assembly.  I just need to know where I could find methods to
load, display, and modify the palatte of an SHR screen without
actually being in GSOS.

   Thanks in advance.


  --> Mike Hamaoka
      (mhamaoka@athena.mit.edu)