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The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
book

The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition

by Lyla B. Das
May 2024
Intermediate to advanced content levelIntermediate to advanced
665 pages
23h 2m
English
Pearson India
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
218 THE x86 MICROPROCESSORS
to retain the bus until a string transfer is completed fully, it can use the instruction (say) LOCK
REP MOVSB. So the processor does not have to relinquish the bus after one bus cycle, as may
be the case if the LOCK prefi x is not used. Instead, the bus is retained until the complete string
operation is over.
We have discussed all the maximum mode pins of 8086 and the diagram, with all the
control signals, is shown in
Fig 6.25
6.5 | Instruction Cycle
Now, let us decide what we mean by the word ‘instruction cycle’.  e time taken by the processor
to execute an instruction is called an instruction cycle, and it is specifi ...
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Publisher Resources

ISBN: 9781282663169