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:
- SCSI bus adapter
- Internal (self terminating) 50-pin ribbon cable for two SCSI devices
- PowerSCSI User's Manual
- PowerSCSI Multi-lingual Quick Reference Manual
- Power SCSI Universal Application Interface Software (CD-ROM and Diskettes)
The SCSI bus adapter features include:
- 10MB Fast Synchronous SCSI-2 performance
- Automatic adapter termination
- Automatic SCSI ID assignment for Plug and Play (PNP) devices
- Synchronous and asynchronous SCSI support
- Activity light that illuminates when the card is active
- PowerSCSI Universal Application Interface Software
You can connect up to seven SCSI devices to the adapter, such as:
- SCSI hard disk drives
- CD-ROM drives
- WORM optical drives
- Erasable optical tape drives
- Tape drives
- Other devices that conform to the SCSI and SCSI-2 specifications
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 !
- 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.
- Remove or disable termination on the SCSI devices you are attaching, then follow the instructions to terminate the SCSI chain:
- For the internal SCSI chain: Use the self-terminating DSCSI cable provided to install internal devices. One
end of the cable is permanently terminated and the other end connects to the SCSI adapter.
- For the external SCSI chain: Terminate the last device connected in a series to the SCSI bus adapter. Follow
the device manufacturer's instructions to terminate (enable termination) of this device. Typically you install an external terminating connector
on the last device connected to enable termination.
- 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
- Turn on the computer and go to the DOS prompt.
- 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:
- Number (ID)
- Plug and Play ISA Descriptions
- Serial number of the adapter
- 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:
- Base Memory Address
- Interrupt
- Base I/O Address
- 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.
- Press F3 to save and then Esc for exit the setup utility.
- 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.
- Run the PowerSCSI software, as needed. See the PowerSCSI User's Manual for information.
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