Path: utzoo!mnetor!uunet!husc6!bloom-beacon!oberon!pollux.usc.edu!papa
From: papa@pollux.usc.edu (Marco Papa)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Help needed on Intuition and dual playfield displays
Message-ID: <8957@oberon.USC.EDU>
Date: 8 May 88 07:19:44 GMT
References: <2457@mit-amt.MEDIA.MIT.EDU>
Sender: news@oberon.USC.EDU
Reply-To: papa@pollux.usc.edu (Marco Papa)
Organization: Felsina Software, Los Angeles, CA
Lines: 33

In article <2457@mit-amt.MEDIA.MIT.EDU| dlleigh@media-lab.media.mit.edu.UUCP (Darren L. Leigh) writes:
|I am writing the software for my heart monitor project and am having
|problems with the display.  I would like to use a dual playfield
|display:
[stuff deleted]
|Intuition doesn't handle dual playfield displays so I have to make an
|Intuition display and convert it. 

Not true. If  done the right way, Intuition handles it just right.

[stuff deleted]
|Is this the right way to go about it?  The screen comes up, but the
|original bitmap is full of garbage (but there and writeable) while the
|second may as well not even exist (the mouse won't even go below the
|bottom of the original, 145 pixel tall viewport).
|structures.  My program keeps crashing the machine with guru 81000009
|(deallocated something twice) on termination.  This is apparently just
|from calling CloseScreen on the modified screen structure.
|
|Help!  This is for a class and I have to have it all finished this week!  

The entire source code for what you need is included with the manual of
the Enhancer Software for AmigaDos version 1.2, which might still be
available for the Amiga 1000.  It is on page 69 and it is entitled
"Dual-Playfield Screen Example" by Jim Mackraz.  Once I typed it in and posted
it but I don't have it around any more.  Could any nice folk that saved it
mail it to this student that needs it so bad?

-- Marco Papa 'Doc'
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