I kind of wish I had kept my PET48PN a little longer. I never got a chance to try a Cyrix chip in it. I can tell you one way your board is superior is that it can work normally with a Cyrix 5x86 chip without any additional coaxing. On my two SiS boards, and a DTK Symphony 486 ISA board from the same era, the only way I can get the system to start is to jumper the Cyrix chip for "2.5X" mode which was originally meant for intel DX4s, but ended up just going to BREQ. That lets me boot in 2X mode. From there I have to use software to drop down to 1X, and then back up to 3X mode. If I try to set the chip directly to the 2X or 3X mode using the jumpers, I just get a black screen and no beeps. I'd really like to get to the bottom of that one day.
Your board may also work better at 50MHz. I think the SiS is the way to go for 33 and 40MHz operation though. Overall, I think I still prefer running am5x86s at 160 in my boards. It just feels snappier than the Cyrix 5x86 at 120.
Your L1 memory scores seem to be pretty much inline with mine. I think that's just normal when you can't put the cache in writeback mode.
There are a few other EISA 486 chipsets I'd really like to try. One of them is the VIA chipset. As far as I know, it was developed by Symphony, but then they got bought out by VIA and it was renamed. I was pretty impressed with the performance of my Symphony ISA board, so the EISA one can only be better, right?
Then there's that Intel EISA chipset. That one never comes with VLB slots though, and it's only good in the later revisions. The earlier ones are supposed to be buggy. This chipset is supposed to have the best 50MHz performance though.
"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