I will add that while plucking all the pins across the chips with a dental pick to look for any weak solder joint, I noticed that pins 128-129 on chip 500-0009-01 appear to have some shiny solder. My other boards don't have this. Not bridged, but someone may have been messing with this card at some …

I have one (of 5) voodoo 2 cards that doesn't work, and I'm taking a look into diagnosing it. In DOS, I just lose signal to monitor with this card when launching Tomb Raider. In Windows 98 I test with 3dfx opengl in Quake 2, which allows me to hit ESC twice to revert to software rendering, and get …

It´s running with just one RAM stick in slot 3 now, I don´t know if tis SIS chipset supports that. Did you try with a pair of identical sticks in slots 1 +2? Th cache chip you´r using is 32Kx8. According to the manual this should be 8Kx8 for 128K cache, 16Kx8 for 256K of cache and 32Kx8 for 512K of …

pentiumspeed wrote on 2021-04-07, 00:08: Now make sense. May need to have a 3.3V and 5V tolerant SRAM chips. Cheers, You have that right - these all appear to be 4.5-5.5VCC range. Still stuck "starting ms-dos" with cap and jumper wire. Same with the um61256fk-15 and 256KB group installed.

Interestingly, I put a 486DX in there and switched the CPU Voltage to 5V. The capacitor pads next to the CPU, and the TAG pin28 pad on the motherboard are now 5V.

Can you post a picture of the entire board ? Also: what CPU are you using ? Something is very odd when they jump a wire on the TAG chip + missing the full pin 28 in the socket. What happens in the BIOS when you try to change: L2 cache tag bits: 8 bits ? Attached - Jamicon KM-S4-1, BIOS 4.2 No …

You´re booting DOS from SSD? Just to be on the safe side I would give booting from a real Floppy a try. Any BIOS settings for cache mode, speed etc.? IDE drive removed, floppy starts to load, but system stops doing anything; floppy continues to spin without any access. Locked up - cannot CTRL+ALT+ …

The contact in the 28pin DIL socket is missing. Can you measure +5V at pin 28 on the backside? If you can, replace the socket. 3.48V on the pad at the back The pad looks to have never had a pin installed - just the small blob of solder. I have jumpered the TAG chip's pin over to 5V and it stalls …

Photos attached (apparently can't post in-line without https...) .

I have a later SiS 85C496/97 486 motherboard here that I've been trying to troubleshoot L2 cache issues for months. The board will only boot to DOS with L2 disabled. There is no pin, trace, or pad on the pcb for the VCC pin28 on the TAG chip. It came with a um61256fk-15 chip that has a jumper wire …

I installed this driver for my MWave MDSP2780 but I got no sound because there is no mixer: http://aptivasupport.com/20d_setup.html Get anywhere with this yet? I can't even get a MDSP2780 (765D) working in Windows 98SE. The limited BIOS shows on the test page as "DSP" available, "audio" unavailable …

Tested mine today - working perfect. Found that it had issues with the mouse driver I had, but ctmouse works fine.

I have a CT2890 soundcard here that I have been unable to get working. I have performed this troubleshooting on both Pentium 100 and Athlon 750 systems, ruling out BIOS issues. Summary for DOS 6.22: [hr] In a fresh DOS + Win3.11 install, I have installed CTCM and try to use CTCU. It lists the card, …