FPU emulation
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- Posts: 3
- Joined: Tue 28 May, 2019 6:10 pm
FPU emulation
Is there any way to enable FPUs on certain CPUs? I've looked around, and I haven't even seen an answer to this
- SarahWalker
- Site Admin
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- Joined: Thu 24 Apr, 2014 4:18 pm
Re: FPU emulation
No. Currently FPU is only emulated on 486DX and later CPUs.
Re: FPU emulation
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
https://archive.org/details/intel387dxm ... _304833001
- ruben_balea
- Posts: 191
- Joined: Mon 08 May, 2017 11:24 pm
- Location: Spain
Re: FPU emulation
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.
- SarahWalker
- Site Admin
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- Joined: Thu 24 Apr, 2014 4:18 pm
Re: FPU emulation
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.