Introduction; 83-Key Keyboard Description - IBM XT 5160 Technical Reference

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