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+3 votes
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Consider a 16 bit hypothetical process which support 1 word instruction , instruction contain 8 bit opcode ,and address field , instruction is stored in the memory with the starting address of 732, decimal on words . Processor contain 1 register that is r0 ,r0 contain 220, address field of instruction contain 111, memory contain 111 is 155. Calculate the effective address where the instruction is designed with

1) immediate

2) register

3) direct Am

4) register indirect addressing mode

5) memory indirect Am

6) indexed Am (ro as index reg)

7) 3 auto increment ro as base register

8) pc relative address mode

9) base relative address mode ro as base register .

Explain each ans...
in CO and Architecture by Active (3.7k points) | 477 views

2 Answers

0 votes
1) 733

2) 111

3) 111

4) 220

5) 155

6) 331

7) 224

8) 845

9) 331
by (75 points)
0
i think in 7th one answer should be 223
0
How come 1 and 2? There is no EA calculation for immediate and register mode. EA calculation starts from no. 3 onwards. Please correct me if I am wrong.
0 votes

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by Boss (35.1k points)

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