Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod!wuarchive!udel!haven!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.sys.apple2
Subject: Re: Video Overlay Card software?
Message-ID: <14860@smoke.brl.mil>
Date: 15 Jan 91 02:57:57 GMT
References: <14833@smoke.brl.mil> <1991Jan14.214626.4775@nntp-server.caltech.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 18

In article <1991Jan14.214626.4775@nntp-server.caltech.edu> toddpw@nntp-server.caltech.edu (Todd P. Whitesel) writes:
>>Sounds like GS/OS should at its very beginning tell the memory-manager tools
>>about all the areas with reserved uses, such as display pages.
>It does. The secondary SHR page (which is what's in question here) is specific
>to the VOC, and GS/OS currently does not check for it. By the time the VOC
>inits and such are run, it's too late anyway because the memory has been used
>for handles (which can't move once they are allocated).

Yes, but what I had in mind was the GS/OS kernel, not a VOC init, reserving
the secondary SHR page along with the other areas it already knows about,
avoiding the fixed-handle-in-important-location problem.  I understand why
it wouldn't have done that before the VOC card was released, but I don't see
why it wouldn't be taken care of in recent IIGS System Disk releases (e.g.
5.0.4), simply as part of support for their own product (VOC).

I've been having a lot of fun playing with my VOC.  I notice that the top
of the NSTC-video display tends to tear a bit (playing a VHS tape); is there
a fix for this or do I have to buy a better VCR?