whats this?

abraXXious

Active member
Banned
Joined
Dec 28, 2009
Posts
1,099
Country
Australia
I have one of those somewhere! LTAC is absolutely correct, it is the predecessor to the 2091 card. From memory, the main difference is that it cannot auto boot.
 

Zetr0

Ya' Like it Retr0?
Joined
Nov 22, 2007
Posts
9,900
Country
UK
Region
Norfolk
A2090
Company
Commodore, USA
Date
1987
Amiga
A2000, A3000, A4000
Interface
Zorro II
Autoconfig ID
514 / 1
515 / 3

  • SCSI and ST-506 controller
  • supports seven SCSI and two ST-506 devices at once
  • the SCSI drives are controlled by the WD 33C93 IC
  • the ST-506 drives are controlled by the Zilog Z80B CPU
  • the 33C93 chip can be controlled by either the 68000 (default) or by the Z80
  • DMA transfers are provided by the custom Commodore 8727 IC featuring a 64 byte FIFO buffer
  • the Z80 CPU has 2 kB RAM to buffer commands from the Amiga, 8 kB PROM with driver routines and 1 kB RAM for storage of variables
  • cannot autoboot
  • does not support the SCSI Direct protocol
  • does not support partitions and drives larger than 256 MB
  • the ST-506 interface does not support 16-head drives
  • 50 pin internal SCSI connector
  • DB25 external connector
  • hard disk activity LED connector
  • on Zorro III machines the card only works if the driver and all the buffers are loaded into chip RAM
  • A-Max II driver (hddisk.amhd)
 
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