VOGONS


First post, by jasa1063

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I bought a NuXT v2.0 motherboard back in April 2020. It has worked with no issues since I have gotten it. All of the sudden the 8087 math coprocessor is not working. It is as if it is not even plugged into the socket. Now I now the 8087 itself is Ok, since I have tried it in another computer and it works just fine. I also tried an 2nd know working 8087 have gotten the same result. I even forced the BIOS equipment flag to indicate an 8087 is installed, but no software can detect it. Any ideas what would have gone wrong with the motherboard to cause such an issue. I messaged Monotech PC, the maker of the motherboard, but I have not heard anything back yet. Any insights would be greatly appreciated.

Last edited by jasa1063 on 2023-11-12, 23:51. Edited 1 time in total.

Reply 2 of 3, by jasa1063

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Disruptor wrote on 2023-11-12, 23:32:
What 8087 have you used? 8087 8087-1 8087-2 […]
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What 8087 have you used?
8087
8087-1
8087-2

I have an 8087-1 and tested it with a 2nd 8087-1. Both work in the Epson Equity Ie I tested them in.

Reply 3 of 3, by jasa1063

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Well it turned to be the NEC V20. Monotech PC suggested I try a different CPU. I tested with both an 8088 and the replacement V20 and everything is now working. I would not have guessed that to be the issue, especially with it working with everything else. I am just glad the issue is resolved.