Cybervision 64 troubleshooting help!

[kidkoala]

Good evening..
I'm trying to get a Cybervision 64 card working in a A4000;
I use os 3.9 and i've tried Picasso96 and Cybergraphx V3 drivers, they both produce the same results.
I use a tv with native screenmodes to boot, and test the Cybervision with a Eizo 17" CRT and an old cheap LCD, using the test mode in the Screenmode program.
When testing Cybervision screenmodes all modes work, but the picture is very very dark, monotone and kind of slightly distorted. Dark grey or on the LCD almost green.

Any tips? are there any jumpers on the 4000 or the Cybervision card that affect this? I'm thinking stuff like Int/ext Clock signal like on the 3000 (guess that wouldn't produce a picture at all if wrong).

[SyrTran]

One possibility is JP3, near the middle of two VGA sockets.  This is the 75 Ohm termination for the VGA out.  This is normally open and assumes the monitor is terminated (most are).  If this has a jumper on it, and your monitor is normal, this might mess up the picture, somehow (I'm no video engineer).

The jumpers are:
JP1 - Slow Buster mode - normally open, for Buster chips older than Rev. 11.  The manual says it only works for boards with serial numbers with 81xxxxx.

JP2 - reserved - normally open

JP1 and JP2 are between the QFP chips above the Zorro connector. JP1 is towards the front of the computer, JP2 is towards the VGA sockets

JP3 - Output termination 75 Ohm - normally open
Near the VGA sockets

JP4 - Input termination 75 Ohm - normally closed
This is at the bottom of the VGA In socket

JP5 - Reserved - normally open
This is on the bottom edge of the board almost halfway between the Zorro connector and the VGA In socket.

[kidkoala]

Thank you for kicking my butt towards jumpersettings, I was onto that but didn't have the energy

Now it's working!

The trick was to set the CPU CLock to EXT, and the CLK 90 Clock to INT, on the A4000 mainboard.

See here for more info., if you're interested, and maybe can answer my questions:

Other graphics card thread

[Darrin]

I use a Cybervision 643D and I noticed in your link to the other thread you ask if you will need to chnage your monitor setting when you flick between native and RTG modes.  On all the monitors I use which have a menu driven adjustment method they remember the settings for each mode, so once you've set up your RTG screens and the native screens then they'll always look fine when you swtich between them.

It may be different for those older monitors with manual adjusters.