INTRODUCTION TO MICROPEOCESSOR
MICROCOMPUTER SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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This is an 8279 control word that inhibits writing to either half of each display RAM location.
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Display Write Inhibit
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Display Read Inhibit
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Read Display
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Write Display
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Explanation:
Detailed explanation-1: -It has a display RAM of 16*8 matrix, however; the arrangement can be organized in dual 16*4 RAM. The RAM is loaded by the CPU however, once data loading is done, the 8279 performs data displaying and refreshing functions.
Detailed explanation-2: -The control signals WR (low), RD (low), CS (low) and A0 are used for read/write to 8279.
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