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)

Memory

• 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