so...
4) To be fair, with an ISA bus at 18MHz+ it will be hard to find a sound card working, also with sound the performance will be lower.
COVOX (parallel DAC) sound cards should work fine with this mode, also Sound Blaster cards on Direct Mode should work fine. I've tested those modes on a 13MHz bus fine without issues. Maybe 18MHz+ bus is another story, never have pushed so far.
In my opinion the SXL40 and SXL2-50 in PGA form are uncommon, not rare. The DRx2-33/66 is rare.
There were a 4 or 5 SXL(2)-40/50 chips that sold on CPU world just a few days ago. I think the price range was $15-$35.
Here's my notes from another thread where I tested doom with different cache settings-- Looks like your record is pretty safe from my scores. Re: 486DLC cache coherency blues and headaches
I recently sent away to get some thermal tape to attach a heatsink to my 486slc. Should arrive one of these months. Chip runs hot.
In case someone has Ti486SXL or Ti486SXL2 PGA132 and wants to configure or tweak it properly. Here is cache486.exe - just want to put it here so I have it at hand 😉