Thanks for the responses. I'll get this motherboard reinstalled in the case and check the BIOS setup again... it may offer the choice between write-through and write-back L2 cache modes.

I have the 486 motherboard "SIH 486B" from NIC Technology. It seems to be properly configured for 64kB cache with 8 x 8Kx8 cache chips installed, TAG1 is 8Kx8, but TAG0 is empty. According to the datasheet TAG0 should be 16Kx4 in all cache configurations. Motherboard reports 64KB cache at POST. In …

Finally found the mini tower case I've been looking for. This is the exact same case that I had in high school for my am386DX-40 system. I just purchased this one on eBay and it looks to have an i486SX-25 CPU on a SIH 486B motherboard. There's a network card, IO card, video card, and modem installed …

I pulled the 96MB EDO RAM and installed 32MB FPM 60ns RAM. I'm using the two 72 pin SIMM sockets closest to the edge of the board. Enabled all L2 cache settings. Still no L2 cache detected, speedsys screen attached. The cache module is getting 3.3V power and the chips used are HMC HM62H256AJ-15. I …

I just picked up a 486 desktop for cheap on Craigslist and it has the M919 motherboard version 3.4B/F. The CPU is Am5x86 133MHz. It has 96MB EDO 60ns RAM installed. It has a cache module installed. Verified that it is marked "M919-02S5" and has the HMC 15ns RAM SRAM. Looks legit. At POST there is a …