Adaptec AHA-2740W User Manual page 107

Glossary
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Adaptec EZ-SCSI
A user-friendly software pro-
gram that automatically installs
software drivers for SCSI
devices such as fixed disks and
CD-ROM drives on a PC.
Adaptec EZ-SCSI copies the
required software programs to
the PC's fixed disk and edits the
configuration files so the host
adapter can access the devices.
Advanced SCSI Programming Interface
See ASPI.
AIC-7770
Adaptec's single-chip EISA-to-
Fast SCSI host adapter.
ASPI
Advanced SCSI Programming
Interface. A standard SCSI soft-
ware interface that acts as a liai-
son between host adapters and
SCSI device drivers. ASPI
enables host adapters and
device drivers to share a single
SCSI hardware interface.
ASPI Manager
A software module that pro-
vides an interface between ASPI
modules, a host adapter board,
and the SCSI devices connected
to the adapter. A single ASPI
manager can handle multiple
I/O requests from multiple ASPI
modules. ASPI managers are
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AHA-2740W/2742W/2744W User's Guide
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A A Print Spec Number: 492897-00
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Current Date: 8/3/94
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written for a specific operating
system—such as DOS, OS/2, or
NetWare—and a specific family
of host adapter boards.
Asynchronous Data Transfer
A data transfer method that
involves interlocking a signal to
the initiator and a signal to the
SCSI target in such a way that
each step of the data transfer
must occur before the next step
can begin. Asynchronous data
transfer is usually slow. The rate
is not affected by external timing
constraints such as cable length
and circuit response time.
AT Bus
See ISA.
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BIOS
Basic Input/Output System.
Software coded into computer
chips for various purposes. The
BIOS on the motherboard of a
PC is the special program used
to boot and control the com-
puter. There are other kinds of
BIOS, such as Host Adapter
BIOS.
Bus
A pathway for data in a com-
puter system. All PCs have an
expansion bus which is
designed to host add-on (expan-
sion) devices such as modems,
Page: Glossary-1
ECN Date: 8/9/94
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Glossary-1
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