Adaptec AHA-1740A - Manual (Page 62)

Mailbox In
An area in main memory assigned by the host microcomputer soft-
ware for communication with the host adapter. The host adapter
places status and pointer information in entries in the Mailbox In
(MBI) to indicate to the host microcomputer what operations have
been completed or what information must be obtained from the
host microcomputer.
Mailbox Out
An area in main memory assigned by the host microcomputer soft-
ware for communication with the host adapter. The microcom-
puter software places commands and pointer information in
entries in the Mailbox Out (MBO) to indicate what operations
should be started by the host adapter.
Manager
The component of a driver which is specific to a particular board
architecture and presents a standard ASPI pass-through inter-
face for use by the peripheral-specific component of the driver,
known as a module.
MBI
See Mailbox In.
MBO
See Mailbox Out.
Multi-tasking Operation
The execution of commands in such a way that more than one
command is in progress at the same time, allowing the system to
take advantage of overlapping activities by using resources that
are temporarily not required for other operations. More than one
program or more than one portion of a program may be operating
in parallel.
PC-AT
A family of small computers sold by IBM, also called the Personal
Computer/AT family of computers. The name is trademarked by
IBM.
adaptec AHA-1740A/1742A/1744
GL-6