In ROM version $77 , the SCSI selection timeout is set to 250ms (too short for old drives). Patch at offset 0x12A4F :
While many guides suggest using a Quadra 650 ROM for 100% success, the Quadra 800 ROM works well if configured correctly. The Quadra 800 coming to Qemu - E-Maculation quadra800rom work
The text "quadra800rom work" likely refers to a specialized or a technical fix used in vintage computing and emulation . It most often appears in the context of the Macintosh Quadra 800 , a powerful workstation released by Apple in 1993. In ROM version $77 , the SCSI selection
: Because the Quadra 800 has a full 68040 MMU (Memory Management Unit), its ROM allows emulators to run A/UX (Apple’s Unix) and NetBSD —something older emulators struggled with. It most often appears in the context of
\ -bios Quadra800.rom \ -drive file=pram.img,format=raw,if=mtd \ -drive file=disk.img,format=raw,if=scsi \ -device scsi-hd,drive=disk Use code with caution. Copied to clipboard You must also have a valid