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From: toddpw@nntp-server.caltech.edu (Todd P. Whitesel)
Newsgroups: comp.sys.apple2
Subject: Re: More extended graphics on the IIgs
Message-ID: <1991Jan23.072058.26127@nntp-server.caltech.edu>
Date: 23 Jan 91 07:20:58 GMT
References: <1991Jan18.170510.1@gacvx1.gac.edu> <14908@smoke.brl.mil>
Organization: California Institute of Technology, Pasadena
Lines: 14

gwyn@smoke.brl.mil (Doug Gwyn) writes:

>I could have sworn that the docs (VOC Developer's Kit from APDA) said
>that there was a separate scan-line interrupt available for the VOC.

That's my suspicion. I'm pretty sure I know which bit it is, too: when I
was playing with the VOC registers to find the interlace controls, I discovered
that setting one of the bits would cause a bizarre crash/beep behavior. I
believe that this is because no one claimed the interrupt -- but then there
should have been a monitor crash (I was doing this without GS/OS loaded), and
there wasn't. I'll look into it when I get the bordercolor clock init working.

Todd Whitesel
toddpw @ tybalt.caltech.edu