Thanks to all that responded to my post!

I wanted to post the resolution for the benefit of others who may experience the same problem.

The 486DX2-66 MHz AST Computer required 70 Nanosecond (ns) Fast Page Mode, non-parity, 72-pin SIMM's. Usually computers that specify 70 ns FPM RAM will work fine with 60 ns FPR. Usually, as long as the memory is faster than the specified value, you're OK.

I this case there was 4 MB of "integrated" 70 ns FPR on the MoBo. The designers, in their infinite wisdom, did not make provision on the MoBo for a jumper to disable the on-board RAM. Because of this, 60 ns RAM would NOT work. It did recognize it in the CMOS Set Up, it counted up normally, but during Windows setup (95 or 98) the above error message displayed and setup failed.


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Dave