Re: [hatari-devel] TOS bootup tester results

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 26/06/2015 22:15, Eero Tamminen a écrit :
> Hi,
>
> What if in WinUAE core we default to 32-bit addressing on TT,
> as with that RAM detection seems to work in all cases?
>
> Do you think that would cause issues somewhere else?

I don't know, that would need more tests to be sure there's no side 
effect, I'd rather leave it for now and see after 1.9 is released.

Nicolas

> 	- Eero
>
> On perjantai 26 kesäkuu 2015, Nicolas Pomarède wrote:
> > Le 26/06/2015 00:55, Eero Tamminen a écrit :
> > > Enabling MMU doesn't help, but enabling 32-bit addressing makes TOS v3
> > > work also with 4MB of RAM.  I.e. it was actually 32-bit addressing,
> > > not TT-RAM, that helped.
> > >
> > > Why things work without 32-bit addressing when there's >4MB of ST-RAM?
> >
> > Hi
> >
> > memory above 4 MB was not a standard MMU confirguration. In that case, a
> > patched version of the TOS is needed (or some programs in auto/ that
> > will reconfigure the TOS memory map).
> > In Hatari, we force a few system variables in stMemory.c to skip the
> > hardware ram detection. When we skip the ram detection, I guess we also
> > skip some parts of the boot process that requires 32 bit and that once
> > the ram detection is done (or skipped), TOS doesn't try to access 32 bit
> > address, only the ram that was declared in TOS.
> >
> > Nicolas