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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: <1992Aug21.063930.4986@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: <3156@isgtec.isgtec.com> <9887@uqcspe.cs.uq.oz.au> <l97k9mINNlsv@aludra.usc.edu>
- Date: Fri, 21 Aug 1992 06:39:30 GMT
- Lines: 36
-
- In article <l97k9mINNlsv@aludra.usc.edu> baffoni@aludra.usc.edu (Juxtaposer) writes:
- >In article <9887@uqcspe.cs.uq.oz.au> warwick@cs.uq.oz.au writes:
- >>Question: will 1280x480 interlaced be possible with a MultiSync?
- >
- > I doubt it. Since it looks like you are looking at a 640 max (monitor)
- >horiz. freq., there aren't that many more pixels you can squeeze into the
- >visable portion of the screen beyond the 732 that was mentioned. More than
- >that will probably give you diagnal streaks accross the screen because the
- >gun isn't hiding fast enough during Hblank.
-
- And on *that* note... Just thought I'd share with ya a little experience I've
- had (I actually reported this several months ago). After installing an ICD
- AdSCSI into my Mega, an interesting thing happened when I wrote to my hard
- drive. In monochrome mode, the screen would reset and display 1280x200 instead
- of 640x400. (On a multisync monitor. I haven't pulled my SM124 out of its box
- since I moved to California, tho mebbe I ought to just to see how it reacts.)
- I must say, it was rather disconcerting to have all the even pixel rows on
- the left half of the screen and all the odd rows on the right half, but a
- couple quick patches into Line-A fixed that right up and I had me a 1280x200
- desktop. You should've seen the patched Overscan mode... This monitor is only
- rated at 1024x768 with interlace, but I coaxed 1440 pixels per row out of it.
- Tried for 1472 but the edges started to warp and bleed...
-
- At any rate... (ah, sorry, no pun intended) I guess the moral of the story is
- that you never can tell exactly where your limits will be when messing with a
- multisync monitor. If I ever got around to outfitting my ST with a timing
- circuit to introduce an interlace delay, this quirk could actually be useful
- to me. As it is, it's just a strange curiosity, which ICD assures me I can cure
- by soldering a bypass capacitor onto the AdSCSI board. (I haven't done it yet
- 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.)
- --
- -- Howard Chu @ Jet Propulsion Laboratory, Pasadena, CA
- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
- ::To the owner of the blue Mazda, license 742-XLT, your headlights are on...::
- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
-