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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
Microcomputer systems 65
display, providing various programmable screen and character formats, and generating
synchronizing and blanking signals. Characters to be displayed are usually retrieved from
memory and displayed on a row-by-row basis. Direct memory access (DMA) techniques are
used to permit fast data transfer without requiring the attention of the CPU. Internal registers
are provided to buffer several lines of the display during scanning. The process of building up
lines of the display is illustrated in Figure Ί .70. Note that although this example shows a row
of 40 8 x 8 characters, both the number of characters per row and the compositio ...
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Publisher Resources

ISBN: 9781483193670