Re: NetBSD-9 on 486DLC? (was Re: NetBSD-9 on 80486?)

John,

I have NetBSD 4 installed on an Intel 486, and it works well. I recall
about 5 years ago trying to install 6.1.4 on it as well, but I don't think
I was even able to boot. I'll try a newer version and see what happens.
I see you have 32MB of memory, which I have run 7 generic on before
(different CPU though).

Ben

On Fri, Jul 30, 2021 at 11:17 AM John Klos <[email protected]> wrote:

> I renamed the subject since this may be an issue with the 486DLC, but not
> with 80486 in general.
>
> > Hmm, NetBSD 5.0 is the first release after i386 support was removed:
> >
> > http://gnats.netbsd.org/36163
> >
> > Cx486DLC may not fully support i486 instructions. Linux seems to drop
> > its support along with i386:
> >
> > https://lkml.org/lkml/2012/12/11/131
>
> The Cyrix and TI 486DLC support the atomic operations of the Intel 80486,
> according to their datasheets, although I'm not
>
> "The LOCK prefix can be used with the following instructions:
> Bit Test Instructions (BTS, BTR, BTC)
> Exchange Instructions (XADD, XCHG, CMPXCHG)
> One-operand Arithmetic and Logical Instructions
> (DEC, INC, NEG, NOT)
> Two-operand Arithmetic and Logical Instructions
> (ADC, ADD, AND, OR, SBB, SUB, XOR)."
>
> Now I can't help but wonder what else might've changed... I'll keep trying
> different things.
>
> Thanks!
> John
>