Re: Boot netbsd 2.0 on RiscPC

Am Donnerstag, 24. März 2005 01:20 schrieb David Brownlee:
> On Wed, 23 Mar 2005, Peter Teichmann wrote:
> > Well, actually I even managed to install it. But my problem is, that it
> > is very hard to boot a kernel. Maybe one out of 30 tries actually works.
> > I tried lot of different things:
>
> [...]
>   Have you tried removing one or other of the SIMMs? NetBSD tends
>   to place much higher demands on the memory and marginal setups
>   that work in RiscOS can fail under NetBSD.

I don't think this is the problem, for it is the bootloader and not NetBSD 
itself that has problems. If NetBSD is started using the old BtNetBSD, as 
suggested by Neil Walker, there are no problems.

Anyway, i tried it with several combinations of the following 6 SIMMs:

SIMM A,B: 32MB, with 2 banks 16MB each (the original ones)
SIMM C,D: 32MB, with 2 banks 16MB each (different type)
SIMM E,F: 64MB, with 1 bank of 64MB

Needless to say, all SIMMS were stable in the machines they were in 
originally. BtNetBSD was able to boot with any combinations of them.

Boot32 was only able to boot with SIMM C or D in any of the slots, but not 
with both of them. It failed with any other combinations I tried.

How can we explain this?

Peter Teichmann