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4 cards from this section. Quick, good the night before a test.
What is the function of an opcode?
Think about what the CPU needs to know to execute an instruction.
How many bits are needed for an opcode representing 8 different operations?
Use the power of two to determine the number of bits.
What is the role of an opcode in instruction formats?
Remember why the CPU needs an opcode.
True or False: Zero-address instructions require operand specification.
Think about what is meant by zero-address.
Design an instruction set for a hypothetical simple PDP (Programmable Data Processor). Include at least 6 operations.
Consider how many bits you would need for your operations.
Evaluate the trade-offs between a one-address and a three-address instruction in terms of processing speed and flexibility.
Think about how many operations you can execute in a single instruction.
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