[hatari-devel] SCU/VME register access?

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

Currently Hatari allows emulated code to access MegaSTE & TT SCU/VME 
registers without exceptions,
although Hatari doesn't actually emulate those
registers.

Based on code comment, this is done for TOS
(2.x I assume) to be able to recognize MegaSTE.
But there's no comment on why it's allowed for TT.

Linux tries to use those registers if they're
accessible, and will fail to boot under MegaSTE
and TT emulation because of that.

I've added patch to Hatari which can be used to
make this register access build-time configurable:
https://git.tuxfamily.org/hatari/hatari.git/tree/tools/linux/hatari-vme-access.patch

(With them being accessible by default.)

Would it be OK to commit that change to Hatari,
instead of just having it as a separate patch?


	- Eero

PS. SCC registers were earlier also a problem, but
not anymore as Hatari emulates them now.  However,
I don't see SCU/VME register getting emulated any
time soon.