A4091
Manufacturer
Commodore / DKB, USA
Date
1993
Amiga
A3000, A4000
Interface
Zorro III
Autoconfig ID
513 / 84
514 / 84
    Fast SCSI 2 DMA controller
  • NCR 53C710
  • autoboot ROM
  • 50 pin internal connector
  • 50 pin HD Centronics external connector - expensive cables and terminators
  • place for a 3.5" hard disk on the card
  • active SCSI bus termination
  • no RAM option
  • only works with Buster 11, either installed in A3000 or A4000
  • does not work with A3640 equipped A3000s
  • early, Commodore built boards booted only under Kickstart 3.x
  • supported by Linux, NetBSD and OpenBSD
    DIP switch settings
    switch 1-3- SCSI ID
    switch 4- fast bus: ON - disabled
    switch 5- delayed autoboot: ON - enabled
    switch 6- synchronous mode: ON - disabled
    switch 7- termination: ON - disabled
    switch 8- LUN: ON - enabled
Photos
Commodore / DKB A4091 - Rev A front side
Rev A, front side
Commodore / DKB A4091 - Rev B front side
Rev B, front side
Commodore / DKB A4091 - Rev B back side
Rev B, back side
Driver / Installation Disk
  • A4091-4002.dms
    install disk
    68040.library v37.30 (18.1.93),setpatch v40.2 (17.2.93)
    185 kB
  • A4091-4014.dms
    install disk
    68040.library v37.30 (18.1.93),setpatch v40.14 (7.10.93)
    203 kB