Correction with the P166 classic. I made a booboo. It was being undervolted and the multiplier was set wrong. At 2.5X and 3.5V it works the same as the Pentium MMX chips....no L2 cache. I tried 133MHz too, no difference. I have a feeling that the BIOS is detecting the CPU type and automatically disabling the cache when it doesn't find what it wants. The Socket 4 CPUs are all Family 5 Model 1, but the socket 7 chips have different model numbers in their CPUIDs. I have a feeling that's throwing something off.
About the K6-2 and K6+ chips. I could remove the L2 cache from the board, but that's one hell of a lot of ICs to take out. Since the system doesn't even post I think it's unlikely to help.
*edit* I removed the cache chips. It had no effect. I tried all the multiplier options too. No dice. I wonder if the guy that adds k6+ support would like to have a shot at my decrepit pentium bios.
I tried tillamook again. I was able to get it up to 233MHz, but the 4X (and higher) multiplier isn't working. It's like pin BF2 isn't connected...but it is.
"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium