Hi grim,
> I have RISC OS 2 ROMs which have always worked fine for me on Archie;
> but they don't seem to work too well with ArcEm.
Just to make sure it's really 2.00, is the rom file's SHA1 digest
b82a78830dac386f9b649b6d32a34f9c6910546d?
http://inputplus.co.uk/ralph/#acornem
riscos-2.00.rom b82a78830dac386f9b649b6d32a34f9c6910546d 524288
> The problem I have seems to be mainly with screen modes. When I boot
> with the RO2 ROMs, I see a "Supervisor" star-prompt. I issue *desk.
> and then get a mode-0-style, compressed desktop. Palette doesn't let
> me switch to any other mode.
Looks like a CMOS RAM setting is constraining you, probably because your
hexcmos file contains RISC OS 3 settings, i.e. the same byte means
something different between the two OS versions. You can try a
"power-on reset" by holding down "R" during power-on IIRC. Don't know
how well that works in the emulator compared to the real hardware. :-)
`*Status' may help, in particular the ScreenSize setting. `*Configure'
changes it.
Alternatively, David Gilbert, author of arcem, provided a hexcmos file
suitable for RISC OS 2 back on the arcem-devel list around 2003-06-26;
the subject's "hexcmos for RiscOS 2". Sourceforge's archive appears to
be down at the moment.
We really need links to a selection of disc images and CMOS contents for
the different OSes that could be run.
Cheers,
Ralph.
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