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-ayl...@ilande.co.uk>
Reviewed-by: Laurent Vivier <laur...@vivier.eu>
---
hw/m68k/q800.c | 5 +++++
include/hw/m68k/q800.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
index b5b2cabc33..87665c6407 100644
--- a/hw/m68k/q800.c
+++ b/hw/m68k/q800.c
@@ -657,6 +657,11 @@ static void q800_machine_init(MachineState *machine)
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
memory_region_add_subregion(get_system_memory(), MACROM_ADDR, &m->rom);
+ memory_region_init_alias(&m->rom_alias, NULL, "m68k_mac.rom-alias",
+ &m->rom, 0, MACROM_SIZE);
+ memory_region_add_subregion(get_system_memory(), 0x40000000,
+ &m->rom_alias);
+
/* Load MacROM binary */
if (filename) {
bios_size = load_image_targphys(filename, MACROM_ADDR,
MACROM_SIZE);
diff --git a/include/hw/m68k/q800.h b/include/hw/m68k/q800.h
index 348eaf4703..a9661f65f6 100644
--- a/include/hw/m68k/q800.h
+++ b/include/hw/m68k/q800.h
@@ -50,6 +50,7 @@ struct Q800MachineState {
bool easc;
M68kCPU cpu;
MemoryRegion rom;
+ MemoryRegion rom_alias;
GLUEState glue;
MOS6522Q800VIA1State via1;
MOS6522Q800VIA2State via2;
--
2.39.2
