Model: Quadra 840AV
Cuda ADB: OK.
53C94/53C96 SCSI: OK but lacks DMA support.
MACE ethernet: OK but lacks DMA support.
"New Age" floppy disk controller: No driver.
Many low-end Macs were fitted with a defective 68LC040 processor.
(Penguin can tell you the type of processor in your Mac.)
See the FAQ for information about this issue.
Please send corrections and new results to the linux-m68k or debian-68k mailing list.