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Old 03-11-2009, 06:42 AM   #1
Registered: Feb 2009
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Possible to run linux without FPU/math coprocessor?

I am trying to run linux on a PC/104 cpu module which is basically a stripped down PC. I have tried booting into Puppy Linux and DamnSmallLinux but both halt stating that they cannot run without a math coprocessor / FPU.

Are there any versions of linux that don't require FPU? Or is there perhaps a way to use some type of FPU emulation? Ps. I don't know how to recompile these kernels, so if it's possible to just find a distro that 'works' this way it would be great.. thanks!
Old 03-11-2009, 08:17 AM   #2
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The pc/104 (correct me if I am wrong) defines the form factor and a bus, but not necesarily a cpu type. I've never used these toys, but I've seen around pc/104 pieces with a pentium and many other processors, for example here:

So it all comes down to the type of cpu that your 104 has. As far as I know linux can emulate an fpu when there's none, but you might need to look around a bit or make your custom distro compiled to fit that hardware.

If you really lack an fpu, I would assume your cpu is an early 386 (386 sx, which is damn old, like late 80s/early 90s or so) so I'd start by looking here:

But first you should confirm which kind of cpu the critter has.

Last edited by i92guboj; 03-11-2009 at 08:25 AM.


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