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- Newsgroups: comp.sys.atari.st
- Path: sparky!uunet!elroy.jpl.nasa.gov!hanauma.jpl.nasa.gov!hyc
- From: hyc@hanauma.jpl.nasa.gov (Howard Chu)
- Subject: Re: Falcon Resolution, Audio Sampling
- Message-ID: <1992Aug22.084134.1714@elroy.jpl.nasa.gov>
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: hanauma.jpl.nasa.gov
- Organization: SAR Systems Development & Processing, JPL
- References: <l97k9mINNlsv@aludra.usc.edu> <1992Aug21.063930.4986@elroy.jpl.nasa.gov> <l9a6chINN2f8@aludra.usc.edu>
- Date: Sat, 22 Aug 1992 08:41:34 GMT
- Lines: 38
-
- In article <l9a6chINN2f8@aludra.usc.edu> baffoni@aludra.usc.edu (Juxtaposer) writes:
- >In article <1992Aug21.063930.4986@elroy.jpl.nasa.gov> hyc@hanauma.jpl.nasa.gov (Howard Chu) writes:
- >>because I'm still a little curious about what's going on... Who knows, maybe
- >>one day I'll find a need for a 1440x240 display.)
- >
- > Well, if you can figure out a patch to swap x->y, and y->x, and then
- >turn your monitor on its side, you can get yourself a full-page monitor -
- >albeit a little skinny. :)
-
- No kidding, a bit too skinny... But it's certainly been entertaining to see
- what kinds of programs can and cannot cope with really weirdo screen sizes.
- I was quite disappointed to find that the version of Uniterm I hacked to
- work with Overscan failed in this mode, had to fall back to Zmodem. (Just a
- brief aside - I've come to learn that an 80x50 text screen is tremendously more
- useful than a 160x25 screen....)
- >
- > BTW, what machine did you pull this stunt on? ST or STe (I don't know
- >if the Ad board works on STe, so I thought I'd ask)?
-
- An old Mega ST, with the old homebrew overscan mod, and various other abuses.
- >
- >PS: This is a bit beyond my realm of "knowing" and into guessing, but don't
- >video signals output an Hsynch signal? If so, it sounds like half of the
- >Hsynch signals are being blocked. Then the multisynch monitor compensates
- >for the funky signal...but I guess your monitor is a cut above the normal as
- >ratings are really just minimums...of course it probably helps that it only
- >has to deal with half as many scan lines.
-
- Yeah, not only the hsync, but the video blanking appears to be missing. This
- is not a case of the signal being externally suppressed, as far as I can tell.
- The other funny thing about this situation is that simply writing the current
- value of the ShiftMode register back to itself restores the normal 640x400
- monochrome screen configuration ($ff8260).
- --
- -- Howard Chu @ Jet Propulsion Laboratory, Pasadena, CA
- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
- ::To the owner of the blue Mazda, license 742-XLT, your headlights are on...::
- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
-