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- Newsgroups: comp.sys.acorn.tech
- Path: sparky!uunet!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!rz.uni-karlsruhe.de!stepsun.uni-kl.de!tangram.informatik.uni-kl.de!m_sattle
- From: m_sattle@poker.informatik.uni-kl.de (Matthias Sattler)
- Subject: VIDC speed
- Message-ID: <1992Jul31.122130.13142@rhrk.uni-kl.de>
- Sender: news@rhrk.uni-kl.de
- Reply-To: @uni-kl.de:m_sattle@poker.informatik.uni-kl.de (Matthias Sattler)
- Organization: University of Kaiserslautern (Germany)
- Date: Fri, 31 Jul 1992 12:21:30 GMT
- Lines: 24
-
- In article <17326@acorn.co.uk> osmith@acorn.co.uk (Owen Smith) writes:
-
-
- >I need the high refresh rate to prevent headaches. 800x600x256x56Hz is
- >vaguely feasible, but the VIDC chip usually can't quite handle it and the
- >display is speckled. This also steals two thirds of the system memory
- >bandwidth, and is well out of spec for the machine. I also have a friend who
- >used a 48 MHz oscillator in a PCATS graphics enhancer (standard is 24,
- >25.175 and 36 MHz) to get 1024x768x16x50Hz. It worked fine, but his Eizo
- >9060S monitor couldn't quite display it. 1024x700x16 was OK though.
-
- I used 60 Mhz VIDC frequency in my A5000 and it worked quite well with
- 1024x768x16x60Hz. And even the normal A5000 monitor did it. But I have
- one BIG problem, the VIDC is too slow for that. Meaning I have to cool
- it all the time using cooling-spray ("Kaeltespray" in german but I think
- you'll understand what I mean) because the silicon based microchips are
- fastest at about 0 oC.
- Does someone know if there is a faster VIDC available or how to cool it
- permanently to 0 oC.
-
- Matthias Sattler
- e-mail: @uni-kl.de:m_sattle@poker.informatik.uni-kl.de
- (Funny but this should work.)
-
-