Hi Everyone...Trouble In MameCabVille

[HeadRusch]

I was recently working on my Cab, and had to swap out the Radeon 8500 board I had powering the unit to a Radeon 7500 board.  

After removing the 8500 board and installing the 7500, something has happened to the cab during bootup.  Before, with the 8500, the TV which is connected via SVIDEO would boot correctly, with the TV I use as a monitor working just as a monitor would.

However, upon installing the 7500, the opening screens of my PC's bootup scroll endlessly...my custom Commodore 64 boot-up screen (snazzy!) is in black and white and scrolls up and down the screen endlessly....only when Windows itself initializes does the Monitor display correctly.

What makes it an issue is that if, during bootup, I want to adjust any of the BIOS properties, I can't....the screen is scrolling.  I have to hook up a monitor to the cab in order to not get the scrolling display.

Is this a known problem with the radeon 7500 series of cards versus the 8500 series, regarding monitor hookups and synch during bootup??

If you have any insight, I'd apprecaite it...

[pitfaller]

FWIW my ATI Radeon 7000 AGP card does the exact same thing - I haven't ever tried to nail it down as I believe I only once had to do something in the bios and then I just grabbed a spare monitor that was laying around and jacked it in - a pain in the ass to be sure but considering how little I ever have to mess with the box, I've never bothered to track this particular problem down.

If I were to guess, I would say that the card, at least in the 7000 series, has a single boot time default setting, and then when windows starts to boot, the card pulls the s-video out settings, etc. and then everything is fine.

It sounds like the 8500 series (and I imagine 9000 as well) *retain* those s-video out settings after you shut down - and frankly, that's nice to know - I'll keep an eye out for some cheap used/refurb 8500s now - even though I rarely have to mess with the bios, not having the screen scroll is a nice upgrade...

[bigfuz]

Old post, but I just ran into this....there is a jumper on the 7000 board that you set from PAL to NTSC which eliminates this problem.  (PAL is the default setting)