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FPU emulation
Posted: Wed 29 May, 2019 12:27 pm
by BurnedPinguin
Is there any way to enable FPUs on certain CPUs? I've looked around, and I haven't even seen an answer to this
Re: FPU emulation
Posted: Wed 29 May, 2019 4:52 pm
by SarahWalker
No. Currently FPU is only emulated on 486DX and later CPUs.
Re: FPU emulation
Posted: Mon 17 Jan, 2022 6:34 pm
by Keatah
PCem doesn't run intel's co-processor diagnostics. MCPDIAG.exe. Is this something that may be fixed in a future release?
https://archive.org/details/intel387dxm ... _304833001
Re: FPU emulation
Posted: Tue 18 Jan, 2022 1:11 am
by ruben_balea
If I remember correctly the emulated FPU is only accurate enough to make 3D games look good, so the tests included in some BIOS or diagnostic programs will show errors, spreadsheets will have errors and so on.
Re: FPU emulation
Posted: Tue 18 Jan, 2022 9:01 am
by SarahWalker
I'd be amazed if anyone saw spreadsheets with noticeable errors, but that's the general sentiment, yes. PCem's FPU emulation is for entertainment purposes only, it won't pass those kinds of diagnostics and don't try to do anything mission critical on it.