FWIW, I have a Matrox G200 PCI working just fine in a 486 PCI motherboard (using a DX4ODPR100 overdrive, which is still a 486 not a pentium-class CPU).
Hehe, I have an IBM 486SLC2 motherboard (Opal LX) It can be clocked up to 33/66MHz (with cooling) from the default 25/50. Neat piece of technology, but since the CPU is soldered there is no upgrade path.
(the picture is not mine but I have this exact same motherboard)
I have a 386sx-40 board to which I want to add a coprocessor. The chip I have is this exact one:
The board is the same as this one, a M396F with Am386sx-40:
Will it work?