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5 cards from this section. Quick, good the night before a test.
What is the purpose of the Program Counter?
Think about the flow of instruction execution.
What does the execute phase involve?
Consider what the CPU does with the instruction.
What is the first step in the instruction cycle?
It's the phase before executing anything.
True or False: The opcode is part of the instruction that tells the processor what operation to perform.
Think about what is contained in an instruction.
Given the program sequence: LDA 940, ADD 941, STA 941. Calculate the total time for the program if each fetch takes 3 cycles and each execute takes 4 cycles.
Consider the cycles for both fetching and executing and sum them.
Explain how the change in opcode from 'ADD M' to 'SUB M' would affect the contents of the Accumulator.
Think about the mathematical operations represented by the opcode.
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