Suppose the memory cells at addresses A4 to B1 in
Suppose the memory cells at addresses A4 to B1 in
Suppose the memory cells at addresses A4 to B1 in the machine described in Appendix C contain the (hexadecimal) bit patterns given in the following table:
Address |
Contents |
A4 |
20 |
A5 |
00 |
A6 |
21 |
A7 |
3 |
A8 |
22 |
A9 |
1 |
AA |
B1 |
AB |
B0 |
AC |
50 |
AD |
2 |
AE |
B0 |
AF |
AA |
B0 |
C0 |
B1 |
00 |
When answering the following questions, assume that the machine is started with its program counter containing A4.
a. What is in register 0 the first time the instruction at address AA is executed?
b. What is in register 0 the second time the instruction at address AA is executed?
c. How many times is the instruction at address AA executed before the machine halts?
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