retagged by
8,494 views
1 votes
1 votes

The content of PC in the basic computer is 3AF (all numbers are in hexadecimal). The

content of AC is 7EC3. The content of memory at address 3AF is 932E. The content of

memory at address 32E is 09AC. The content of memory at address 9AC is 8B9F.

a. What is the instruction that will be fetched and executed next?

b. Show the binary operation that will be performed in the AC when the instruction is

executed.

c. Give the contents of registers PC, AR, DR, AC, and IR in hexadecimal and the values

of E, I, and the sequence counter SC in binary at the end of the instruction cycle.

retagged by

2 Answers

4 votes
4 votes
@lav, The answer are:
1. The instruction at 3AF will be fetched and executed next as PC contains the address of the next instruction be executed.

2. The operation that will be executed will depend on how you interpret the contents at address 3AF i.e. 932E.
WHether the operation is addition, sub etc. will depend upon the computer organization.
2 votes
2 votes
The instruction which is pointed by PC will be fetched..

Address of the instruction is 3AF.

Related questions