Upon power-on or hard reset, the 68040 reads the reset vector at 0xFFC00000 (physical). The ROM code:
Some early revisions of the Quadra 800 ROM (version $7F) have a bug in the Memory Manager’s RAM sizing routine. If more than 128 MB of RAM is installed (theoretical max 256 MB), the ROM incorrectly initializes the memory controller, leading to system hangs at boot or only 64 MB recognized. quadra800rom work
Download the recommended custom patch set from the 68kMLA forums. Using a hex editor (like HxD on Windows or Hex Fiend on macOS), apply these changes to your quadra800.bin: Upon power-on or hard reset, the 68040 reads
MAME’s quadra800 driver expects a 2 MB ROM named quadra800.rom with CRC 0x7A8B9C3F (for version $7F). It emulates the Burgundy chipset and 53C96 SCSI. Download the recommended custom patch set from the
