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APA-358A MiniSCSI-2 Installation Guide
Part Number: 510809-00, Rev. A
Print Spec Number: 493477-00
Current Date: 4/11/95 ECN Date: 4/1195
Understanding the MiniSCSI-2
Before you install the MiniSCSI-2, read this section to
learn about MiniSCSI-2 features, components, and
SCSI settings. You will need this information when
you install the MiniSCSI-2.
General Features
The MiniSCSI-2 lets you connect up to seven external
SCSI devices to your computer’s parallel port. You can
connect almost any type of SCSI device, including hard
disk drives, CD-ROM drives, removable-media drives,
and scanners. (For a list of supported devices, see
Adaptec EZ-SCSI User’s Guide.) Your printer and the
SCSI devices can operate simultaneously from the
same parallel port, with no performance degradation.
The MiniSCSI-2 is fully compatible with EPP-
compliant ports. It is also backward compatible with
the non-EPP unidirectional and bidirectional parallel
ports found on many computer systems. There is no
need to specify whether the parallel port is EPP com-
pliant—faster EPP transmission rates are automatic.
When not running in EPP mode, the port runs at stan-
dard parallel port (SPP) rates.
Note: Conventional parallel ports have data
transfer rates of 50 to 260 KBytes/sec. EPP-
compliant ports reach up to 1 MByte/sec.
Adaptec EZ-SCSI automatically configures
the MiniSCSI-2 to the fastest speed possible.
Components
The MiniSCSI-2 has the following major compo-
nents, illustrated in the figure that follows this list:
■ A 25-pin parallel port connector, which plugs into
the parallel port on your computer
■ A 50-pin high-density SCSI-2 connector, which
connects the MiniSCSI-2 to the SCSI devices
■ A printer passthrough connector, which connects
your printer to your computer through the
MiniSCSI-2, allowing the printer and SCSI devices
to use the parallel port simultaneously
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