May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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PERIPHERAL INTERFACING–II 10-47
9. What information does a ‘key code’ hold?
10. What is the role of the decoder 74LS138 in Fig. 10.17?
11. Briefly explain how the 8259 channels an interrupt request from a peripheral to the
8086.
12. Discuss the roles of the following registers in handling multiple interrupt requests:
a) IRR
b) IMR
c) ISR
13. How is a type vector installed for a particular interrupt request?
14. How can interrupt priorities be changed?
15. Name two features which can be set using operational command words.
EXERCISES
1. Using the 8253 chip, generate square waves of frequencies 1 KHz, 12 KHz and
500 Hz, assuming that the ...
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