Amiga A2091 SCSI Card A2000 A3000 A4000

Amiga A2091 SCSI Card A2000 A3000 A4000

Cart 0

Analogic Computers UK Ltd

Amiga A2091 SCSI Card A2000 A3000 A4000


SCSI controller

  • Western Digital 33C93
  • Uses the same DMAC custom chip for DMA transfers as the A3000
  • Knows the Rigid Disk Block and SCSI Direct protocols
  • Built in XT IDE (8 bit) hard disk controller - the connectors and LED are not installed but their place is visible on the card
  • 50 pin internal SCSI header
  • DB25 external connector
  • A 3.5" hard disk can be mounted on the card
  • 16 kB autoboot ROM (can be disabled) - autobooting requires at least Kickstart 1.3
    • revision 7.0 of the ROM is necessary for 68040 machines
  • Supports SCSI network sharing
  • Supported by Linux, NetBSD and OpenBSD
  • A-Max II driver (scsi.amhd)


  • Sixteen DIP sockets accept 0.5, 1 or 2 MB RAM
  • Supports 256k×4 (44256) chips, 120 ns or faster
  • Cannot use DMA to transfer data to 32 bit fast RAM
  • If Zorro II DMA memory is not available the driver falls back to programmed I/O transfers
  • Performs extremely slow in the A4000 because of the above mentioned two problems

Condition: Used

Availability: Out of stock