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Authors:
Linda Null ,julia Lobur
Chapter:
A Closer Look At Instruction Set Architectures
Exercise:
Exercises
Question:19 | ISBN:9780763704445 | Edition: 3

Question

19. The memory unit of a computer has 256K words of 32 bits each. The computer has an instruction format with 4 fields: an op-code field; a mode field to specify 1 of 7 addressing modes; a register address field to specify 1 of 60 registers; and a memory address field. Assume an instruction is 32 bits long. Answer the following:

a) How large must the mode field be?

b) How large must the register field be?

c) How large must the address field be?

d) How large is the op-code field?

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