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Consider an instruction Add 1000. Memory contents, Accumulator (AC), and R1 Register contents are depicted in the below figure:
Consider an instruction Add 1000. Memory contents, Accumulator (AC), and R1 Register
contents are depicted in the below figure: (such as memory address 1000 contains a value 1400,
memory address 1100 contains a value 400 etc. All the numbers used here are decimals.) [8
marks]
Assuming R1 is implied in the indexed addressing mode, determine the actual value loaded
into the accumulator (AC) using the following addressing modes:
1. Immediate
2. Direct
3. Indirect
4. Indexed