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- References: <42116654@phoenix.owl.de> <1865.6653T626T1811@guest.arnes.si>
- From: "Frank Wille" <frank@phoenix.owl.de>
- Date: Fri, 22 Mar 1996 21:56:01 +0200
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- Subject: Re: CV64 Rev.2.0.1 flickers in 24-bit mode
- Message-ID: <42116671@phoenix.owl.de>
- Organization: Phantasm
-
- 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.
-
-
- -- _
- _ // Frank EMail: frank@phoenix.owl.de
- \X/ IRC: Phx @ #amiga(ger)
-
-