Re: NetBSD in QEMU (was Re: Installation Error For Mac68k NetBSD on SE/30)

Hi,

I'm using real Quadra 800 with 520MB memory :)

You need to manually configure and rebuild your kernel:

(1) Enable DJMEMCMAX option. (Commented out for GENERIC by default)
(2) Adjust MAC68K_MEMSIZE option. (Also commented out for GENERIC)

Then, config and build your kernel. NetBSD >= 9.2 can use the whole memory,
at least on real machines.

Thanks,
rin

On Thu, Aug 24, 2023 at 1:36 PM Götz Hoffart <[email protected]> wrote:
>
> On 23 Aug 2023, at 14:25, Paul Ripke wrote:
>
> I started taking notes, but skipped a few steps. I should probably run
> through the process again and fill in the gaps. So, ymmv:
>
> https://www.stix.id.au/wiki/NetBSD-mac68k_under_qemu
>
> Quoting from above page:
>
> Through trial and error, I've found that the maximum memory that
> qemu will support for the emulated machine is 355MiB, any more
> and the ROM fails to initialise. Furthermore, NetBSD fails to
> recognise more than 256MiB.
>
> Perhaps check bbraun’s findings:
>
> https://web.archive.org/web/20230607100726/http://synack.net/~bbraun/djmemcrom.html
>
> A Quadra 800 is a bit different from a Centris/Quadra 610/650, though.
>
> Regards
> Götz