Glossary
Architecture: The design order
of
the
system.
Break: The
scan
code the keyboard sends
when
a key
that
has
been pressed
is
released.
Checksum: A sum
of
numbers used
to
detect equipment
malfunctions in data-transfer operations.
Flexible disc: Thin flexible platter
that
is
coated
with
a magnetic
material used a a storage medium. Also
know
as
floppy disk.
HP-HIL: The Hewlett-Packard Human Interface Link, a standard
for
interfacing a personal computer, terminal,
or
workstation
to
its
input devices, providing a standard interface across
the
Hewlett-
Packard computer product line.
HP-HIL Controller: Developed by Hewlett-Packard
to
interface
the
system
to
the
HP-HIL
input devices. It can accept commands
from the system microprocessor and transmit and receive
information
via
HP-HIL.
It
can
also poll
the
input
devices, collect
data entered by the user, and relay
it
to
the
system.
Make: The
scan
code the keyboard sends
for
a key
when
it
is
pressed.
Processor Extension Card: On
the
HP
Vectra,
the
system
memory
is
contained on the processor extension card. This card
is
directly connected
to
the processor card via
VLSI.
Schematic: A diagram
with
detailed information relating
to
circuitry, layout, terminal identification, showing gates, and
showing circuits, etc.
Tilde: Symbolized by
--.
Used
to
indicate signals
that
are active
low.
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