Servicing Personal Computers, 3rd Edition

98 Servicing Personal Computers

effectively sharing a common CRT display and permitting real-time as well as stored displays.

State domain displays are principally used as a means of investigating the software

operation of a system. Unlike time domain displays, operation is synchronous with the system

clock and data present at each clock transition is captured and displayed in either binary, hex,

octal,

or ASCII format. State domain analysis is a powerful tool in software debugging and is

invariably required at the system development stage. A typical state domain display is shown

in Figure 2.23.

Signature analysis is a facility that allows