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- Path: cmir.arnes.si!usenet
- From: vid.pecjak@guest.arnes.si (Jernej Pecjak)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: CV64 Rev.2.0.1 flickers in 24-bit mode
- Date: 24 Mar 1996 09:42:32 GMT
- Organization: Academic and Research Network of Slovenia
- Message-ID: <2488.6657T634T2252@guest.arnes.si>
- References: <42116654@phoenix.owl.de> <1865.6653T626T1811@guest.arnes.si> <42116671@phoenix.owl.de>
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- >Jernej Pecjak schrieb am 20 Mar 1996 11:44:20 GMT
- >ⁿber "Re: CV64 Rev.2.0.1 flickers in 24-bit mode" :
-
-
- JP>> >Anyone realized that the Cybervision 64 is quite unusable in 24-bit
- JP>> >mode with a pixel clock higher than 27?
- JP>>
- JP>> No, I found out that this phenomem happens when the clock is higher
- JP>> than 47
- JP>>
- JP>> >When I choose such a higher pixel clock, the display flickers when
- JP>> >parts of the screen are moved or scrolled, so I think the effect is
- JP>> >caused by the blitter. The flickering intensifies by further incre-
- JP>> >mentation of the pixel clock.
- JP>>
- JP>> Yes, that is the way it happens to me to.
- JP>>
- JP>> >Is this normal? Is a pixel clock of 27 already the limit for 24-bit
- JP>> >mode? To get 800x600 in 50Hz I need a minimum pixel clock of 29, so I
- JP>> >have to accept some slight flickering. :(
- JP>>
- JP>> Hm, I think not as I have the same card. Try setting the MEMCLOCK
- JP>> variable in Cybervison/MEMCLOCK directory to 50 or 55.
-
- >There's neither a MEMCLOCK variable nor directory. Maybe you're
- >using a different Cybergraphics software? I have the Cybervision
- >v1.35 monitor file.
-
-
- JP>> >BTW, I have a Rev. 2.0.1 board with the new Trio chip.
- JP>>
- JP>> Yes, I have the same board. What is new about that trio chip from the
- JP>> old one? It looks the same as the old one :-(
-
- >Yes, but it has got some additional registers, which have to be
- >set by the driver software properly, otherwise the system crashes.
-
- >If I remember correctly, the Cybervision 1.35 driver was the first
- >one which works with the new chip.
-
- I have 1.41.
-
- Jernej
-
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