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- Date: Wed, 06 Mar 1996 09:51:59 +0100
- From: ez@expograph.nl (Edgar Zuman)
- Newsgroups: comp.sys.amiga.graphics,comp.sys.amiga.hardware
- Subject: Re: Cybervision 16 and 24 bit modes
- Message-ID: <ez-0603960951590001@ez.expograph.nl>
- References: <4hfn6m$rck@rs18.hrz.th-darmstadt.de> <1308.6638T690T1830@ibm.net>
- Organization: Expograph
- NNTP-Posting-Host: ez.expograph.nl
- Path: ez.expograph.nl!user
-
- In article <1308.6638T690T1830@ibm.net>, geohei@ibm.net (Georges Heinesch)
- wrote:
-
- Hi to all Amigians,
-
- > In a message of 04-Mar-96 22:26:46, Niels Knoop wrote:
- >
- > >> So if got this right ... the CV64/4 can't display 1024x768 16/24 Bit
- > >> without a trembling right screen on an A3000/25 (unaccelerated).
- >
- > NK> The stability of the display is not affected by the speed of the Amiga
- > NK> you put the board in, but just depends on the capabilities of the
- > NK> graphics chip, DRAM and diverse settings like screen definition and
- > NK> memoryclock.
- >
- > If you say that the stability of the display is not affected by the speed
- > of Amiga, is it then the board itself, which is generating this trembling
- > effect on the right part of the screen. If this problem is independant of
- > the Amiga used, it must be a problem of the CV itself. Is that right?
- >
- > NK> I think that 1024x768 should be possible non-interlaced in 16 Bit and
- > NK> interlaced in 24 Bit, but don't ask me for details, as I myself don't
- > NK> have a Cybervision, but a Piccolo-SD64 (but run CyberGraphX, too).
- >
- > Well I guess that my question is of general nature and not so much related
- > to the graphics board itself. I have already problems to display 16 Bit
- > 1024x768, however it's slightly better than in 24 Bit.
- >
- > --
- > Georges Heinesch, Luxembourg
- > geohei@ibm.net
- > PGP 2.6.3i public key available on request and on public servers
- >
- > ... if you can't beat them, join them !
-
- I've my CV64 working at 1024x768 16/24 bit on my MicroVitek 1438!
- The only problem I have, is that I don't get any interlaced 16 bit screen
- right, while 8 and 24 bit interlaced work just fine.
-
- I've 1024x768 working with a pixelclock of 51, minimum hor.sync (I'm not
- sure about the name, but it's the item below the hor.resolution), both in
- interlaced (100Hz) and normal (50Hz).
- The hor. freq. is now almost 40Mhz (39.8).
- I fave set the "maximum hor. freq." at 40Mhz (Monitor settings).
- I can't remember the other settings (I'm not at home right now).
-
- I found out that setting the pixelclock at about 1/20 of the
- hor.resolution, my picture looks fine. Only I can't explain why it works,
- but it works!
-
- O, almost forgotten, I have a A4000/030 (also unaccelerated).
-
- Edgar.
-
- --
- Edgar Zuman E-mail: ez@expograph.nl
- Expograph b.v. Netherlands
-