Introduction
Three keyboards are discussed in this section.
The
83-key
keyboard information for the Personal Computer
XT
and
Portable Personal Computer begins below. Information about the
IBM
Enhanced
Personal Computer Keyboard, hereafter referred
to
as the
101/102-Key
Keyboard, begins
on
page 4-22.
83-Key Keyboard Description
The Personal
Computer
XT
keyboard has a permanently attached
cable that connects to a
DIN
connector
at
the rear of the system
unit. This shielded 5-wire cable has power
(+5
Vdc), ground, and
two bidirectional signal lines. The cable
is
approximately 183 cm
(6 ft) long and
is
coiled, like
that
of
a telephone handset.
The IBM Portable Personal Computer keyboard cable
is
a
detachable, 4-wire, shielded cable
that
connects to a modular
connector in the front panel of the system unit. The cable has
power (+ 5 Vdc), ground, and two bidirectional signal lines in it.
It
is
762 mm (30 in.) long and
is
coiled.
Both
keyboards use a capacitive technology with a
microprocessor (Intel 8048) performing the keyboard scan
function. The keyboard has two tilt positions for operator comfort
(5-
or
l5-degree
tilt orientations for the Personal Computer
XT
and
5- or
l2-degree
tilt orientations for the IBM Portable
Personal Computer).
Note: The following descriptions are common to
both
the
Personal
Computer
XT
and IBM Portable Personal Computer.
The keyboard has 83 keys arranged in three major groupings. The
central portion
of
the keyboard
is
a standard typewriter keyboard
layout.
On
the left side are 10 function keys. These keys are
user-defined
by
the software.
On
the right
is
a
l5-key
keypad.
These keys are also defined by the software,
but
have legends for
the functions of numeric entry, cursor control, calculator pad, and
screen edit.
83-Key Keyboard 4-3
To Next Page
Loading...
Need help?
General
