I picked up this ViperJet Type2 board a while back. It has an IBM486SLC and will clip on to a Cyrix 486SLC and maybe a TI486SXLC.

I’ve found the settings for the dips and jumpers but I don’t have the accompanying floppy which apparently has something called jet486.exe on it. I’m guess this allows for control of the clock doubling and cache enable.

Does anyone perhaps have a copy of this software?

Alternatively, is it likely that the Evergreen REVto486 software or the slc_util.exe will work to enable clock doubling and cache?