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Re: WDC VGA 16 (WD90C00-JK)

I have to correct my previous diagnostic, even the 74LS125 gate was good so there was not fault in this 74xx logic. I just soldered all them back. Maybe some solder junction was cracked but I didn't see anything suspicious visually. VGA tests passed. The BIOS reading in programmer (multiple reading …

Re: WDC VGA 16 (WD90C00-JK)

Yeah, I made it, VGA booted with display. I found one suspicious gate IC 74125, replace and solder all good ICs back to the PCB. There was significant change that I didn't get 8 noVGA error beeps but it was completly silent, no image. I pushed a POST card in and see it's spinning in a dead lock, few …

Re: WDC VGA 16 (WD90C00-JK)

I sniffed by osciloscope around the VGA card. I saw signal activity on ISA bus side (addr + data) on BIOS chips but I didn't see any signals going to onboard VRAM and to RAMDAC. There are 4 oscillators - all are working, output voltage swing vary from ~2Vpp to 4,5Vpp, probably due to different …

Re: WDC VGA 16 (WD90C00-JK)

I got one dead Paradise VGA card with WD90C00-JK - beep code as with no VGA inserted. I read BIOS chips with programmer and they are OK. I should have some spare PVGA1A-JK chip, it seems they should be nearly the same...

Re: Windows XP at high resolutions with scaling

got myself an BenQ EX3210R. Windows xp is being a PITA wrt to 1600x1200 resolution. Its not an option on settings, using a gtx 960 2gb, limited to 1280x1024. Trying to get GOG games on xp to play nice but having to use windows 10 gtx 970 to get 1600x1200 @ 165hz And what connection did you use? …

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