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Reply 20 of 27, by PcBytes

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Reflashed both BIOS chips again, this time with the newest BIOS provided by TRW. Same symptoms.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 21 of 27, by PcBytes

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So slight update, now I somewhat got it to run. It now hangs in the way described in the OP only if I have external cache enabled.

Not sure where to look at this point given I redid the joints on all 4 cache chips, and even replaced the TAG RAM chip yet no change in that regard.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 22 of 27, by Ozzuneoj

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PcBytes wrote on 2024-12-23, 22:22:

So slight update, now I somewhat got it to run. It now hangs in the way described in the OP only if I have external cache enabled.

Not sure where to look at this point given I redid the joints on all 4 cache chips, and even replaced the TAG RAM chip yet no change in that regard.

Any idea what has changed since it also froze with cache disabled before?

Now for some blitting from the back buffer.

Reply 23 of 27, by PcBytes

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One thing I definitely remember was accidentally plugging an IDE cable backwards. It fried nothing, I caught it pretty early into POST and reverted the cable in the correct way. Since then it has started working albeit without its onboard cache.

Not sure what can I do at this moment, short of swapping its cache. The hardest part might be sourcing cache chips to rebuild the 1MB back.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 24 of 27, by rasz_pl

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PcBytes wrote on 2024-12-23, 22:22:

So slight update, now I somewhat got it to run. It now hangs in the way described in the OP only if I have external cache enabled.

Not sure where to look at this point given I redid the joints on all 4 cache chips, and even replaced the TAG RAM chip yet no change in that regard.

There was a post about someone having trouble with L2 enabled and K6-3 FIC PA-2013 will not boot with "External Cache Enabled"

https://github.com/raszpl/FIC-486-GAC-2-Cache-Module for AT&T Globalyst
https://github.com/raszpl/386RC-16 memory board
https://github.com/raszpl/440BX Reference Design adapted to Kicad
https://github.com/raszpl/Zenith_ZBIOS MFM-300 Monitor

Reply 25 of 27, by PcBytes

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rasz_pl wrote on 2024-12-24, 06:30:
PcBytes wrote on 2024-12-23, 22:22:

So slight update, now I somewhat got it to run. It now hangs in the way described in the OP only if I have external cache enabled.

Not sure where to look at this point given I redid the joints on all 4 cache chips, and even replaced the TAG RAM chip yet no change in that regard.

There was a post about someone having trouble with L2 enabled and K6-3 FIC PA-2013 will not boot with "External Cache Enabled"

Saw the thread but not of much help. They also did the same as me with replacing the TAG RAM chip and had the same outcome.

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 26 of 27, by PcBytes

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Figured I'd update again. Won a local listing for 3x PA-2013 boards. Gonna be fun 🤣

"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB

Reply 27 of 27, by PC@LIVE

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PcBytes wrote on 2025-01-10, 18:09:

Figured I'd update again. Won a local listing for 3x PA-2013 boards. Gonna be fun 🤣

Very interesting 🧐, keep us updated on the three motherboards, and possibly if you can make progress with the cache, that is, if it works by enabling it.

AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB