Re: NetBSD-9 on 80486?

John Klos <[email protected]> Fri, 30 Jul 2021 02:21:25 +0000 (UTC)

Newsgroups	gmane.os.netbsd.ports.i386
Message-ID	<[email protected]>

Hi,

> NetBSD requires 486 instructions *and* x87 FPU; MATH_EMULATE option
> was removed back in 2008 before 5.0 was released:
>
> http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/i386/i386/Attic/math_emulate.c?hideattic=0
>
> According to Wikipedia, Cx486DLC lacks internal FPU. This should be
> why it does not work. Does the system have slot for external FPU?

The board has an FPU installed (ULSI "DX/DLC"), and even though the dmesg 
doesn't show it, NetBSD makes use of it as evidenced by 
pkgsrc/benchmarks/flops, plus sysctl gives machdep.fpu_present = 1.

Hmmm...

John