From 9d35c6ade54c05754a1cac99df5c9a8ce6252bbe Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Wed, 4 Oct 2023 09:38:05 +0100 Subject: [PATCH] q800: add alias for MacOS toolbox ROM at 0x40000000 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 Reviewed-by: Laurent Vivier Message-ID: <20231004083806.757242-20-mark.cave-ayland@ilande.co.uk> Signed-off-by: Laurent Vivier --- 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 27a0b3c08a..1d7cd5ff1c 100644 --- a/hw/m68k/q800.c +++ b/hw/m68k/q800.c @@ -660,6 +660,11 @@ 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; -- 2.30.2