Hi Jordan, I was starring at pc_isa_bios_init and wondering why you are creating a copy of the system flash for the low ISA range instead of using an alias here as well, just like old_pc_system_rom_init does. That means the ISA BIOS range can run out of sync when the system flash is updated during runtime and requires a restart of QEMU then. Switching to an alias would also allow some code consolidation. Can you explain the idea behind the current version? Jan