Processing Unit Design - Fundamentals of Computer Organization and Architecture - page 106

(ii) If we allow both horizontal and vertical representation, what would
be the best grouping? What is the microinstruction size? Write the
microprogram of Inst-1.
7. A certain processor has a microinstruction format containing 10 separate
control fields C 0 : C 9 . Each C i can activate any one of n i distinct control
lines, where n i

is specified as follows:

i:0123456789
n i :443 19 6718 2
(a) What is the minimum number of control bits needed to represent the 10
control fields?
(b) What is the maximum number of control bits needed if a purely horizon-
tal format is used for all control information?
8. What are the main differences between the following pairs?
(a) Vertical and horizontal microinstructions
(b) Microprogramming and hardwired control
9. Using the single-bus architecture, generate the necessary control signals,
in the proper order (with minimum number of micro-instructions), for
conditional branch instruction.
10. Write a micro-program for the fetch instruction using the one-bus datapath
and the two-bus datapath.

REFERENCES AND FURTHER READING

R. J. Baron and L. Higbie, Computer Architecture, Addison Wesley, Canada, 1992.
M. J. Flynn, Computer Architecture, Jones and Barlett, MA, USA, 1995.
J. P. Hayes, Computer Architecture and Organization, McGraw-Hill, New York, 1998.
J. Hennessy and D. Patterson, Computer Architecture: A Quantitative Approach, Morgan
Kaufmann, San Francisco, CA, 2003.
V. P. Heuring and H. F. Jordan, Computer Systems Design and Architecture, Addison Wesley,
NJ, 1997.
M. Murdocca and V. Heuring, Principles of Computer Architecture, Prentice Hall, NJ,
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D. Patterson and J. Hennessy, Computer Organization and Design, Morgan Kaufmann,
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W. Stallings, Computer Organization and Architecture: Designing for Performance, NJ, 1996.
A. S. Tanenbaum, Structured Computer Organization, Prentice Hall, NJ, USA, 1999.