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Servicing Personal Computers, 3rd Edition
book

Servicing Personal Computers, 3rd Edition

by Michael Tooley
May 2014
Intermediate to advanced content levelIntermediate to advanced
320 pages
13h 41m
English
Newnes
Content preview from Servicing Personal Computers, 3rd Edition
52 Servicing Personal Computers
interrupt is generated when a key depression is detected by a return signal appearing on a
column line. Note that special function keys, such as 'Shift' and 'Control', do not form part of
the matrix. These, higher priority, keys are treated separately as direct inputs to port A.
Serial input and output
Parallel data transfer is primarily suited to high-speed operation over relatively short distances,
a typical example being the linking of a microcomputer to an adjacent dot matrix printer.
There are, however, a number of applications in which parallel data transfer is inappropriate,
the most common example bein ...
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Publisher Resources

ISBN: 9781483193670