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q800: add alias for MacOS toolbox ROM at 0x40000000

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According to the Apple Quadra 800 Developer Note document, the Quadra 800 ROM
consists of 2 ROM code sections based at offsets 0x0 and 0x800000. A/UX attempts
to access the toolbox ROM at the lower offset during startup, so provide a
memory alias to allow the access to succeed.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-ID: <20231004083806.757242-20-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2023-10-04 09:38:05 +01:00 • committed by Laurent Vivier
parent 7685fc2a18
commit 9d35c6ade5
2 changed files with 6 additions and 0 deletions
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include/hw/m68k/q800.h
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@ -50,6 +50,7 @@ struct Q800MachineState {
bool easc;
M68kCPU cpu;
MemoryRegion rom;
MemoryRegion rom_alias;
GLUEState glue;
MOS6522Q800VIA1State via1;
MOS6522Q800VIA2State via2;