IBM 16-Bit AT-Bus Fast SCSI Adapter Plug&Play

IBM AT-Bus Fast SCSI Adapter Plug&Play (Future Domain)

 IBM AT-Bus Fast SCSI Adapter Option P/N xxxxxxx
                    FRU P/N   Opt.P/N
          Adapter   xxxxxxx
   Internal Cable   xxxxxxx   07H0448   (50-pin ribbon)
 Cables with 50-pin high density connector.
   External Cable   xxxxxxx   70G9874   (device has 2xSCSI conn.)
   External Cable   32G0397   8191286   (device has 1xSCSI conn.)
   External Cable   6451042   34F0018

The option package contains:

The SCSI bus adapter features include:

You can connect up to seven SCSI devices to the adapter, such as:

SCSI cable length

SCSI specifications limit total cable length to 6 meters (about 19 feet). The total cable length includes the internal and external cables.

The length of cable inside SCSI devices can reduce this maximum length. For a fast synchronous device such as a SCSI hard disk that suports a 10MB per second transfer rate, the max. cable length is limited to 3 meters (about 9 feet).

Terminating the SCSI Chain

NOTE: SCSI chains MUST be terminated at the internal and external ends !
  1.  The SCSI bus adapter has auto-sensing termination that forms one end of the chain on the adapter, if needed. With only an internal  or external SCSI chain connected, the adapter terminates its end of the chain.
  2.  Remove or disable termination on the SCSI devices you are attaching, then follow the instructions to terminate the SCSI chain:

  3.  The SCSI bus adapter provides termination power for the internal and external SCSI chains attached to the adapter. Do not enable terminator power  on any attached device.

Setting the SCSI IDs

Assign the higher SCSI-ID (6) number to those devices that are most often used or are faster than other devices in the SCSI chain.

Computer Resources Required

 Resource         Possible Settings          Default Setting
 Base Memory    | C8000h, CA000h, CE000h   | CE000h
 Address        | or DE000h                |
 Interrupt      | IRQ5, IRQ10, IRQ11 or    | IRQ15
                | IRQ15                    |
 Base I/O Addr. | 140h, 150h, 160h or 170h | 150h

Configuration in a non PnP computer

  1.  Turn on the computer and go to the DOS prompt.
  2.  At the DOS prompt, change directories to the directory for PowerSCSI,  type pnpcfg and press Enter. The utility displays a Main  Menu that lists each SCSI bus adapter you installed and assigns a number to each one.  The utility displays the following information about each SCSI bus adapter:

  3.  Use the up and down arrow keys, select a SCSI bus adapter and press Enter  The utility displays a Configuration Menu that has a column for:

  4.  Use the arrow keys to identify the base memory address, interrupt and  base I/O address settings. Press the spacebar to make each selection. An asterisk moves to the new selection.
  5.  Press F3 to save and then Esc for exit the setup utility.
  6.  Restart the computer by turning it off and on. The computer now recognizes the add-on SCSI bus adapters  and all SCSI devices connected to it.
  7.  Run the PowerSCSI software, as needed. See the PowerSCSI User's Manual for information.

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