Computer Science 2208A/B Lecture 3: cs2208 3.1
10 Mar 2016
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Document Summary
Examine the stored program machine and show how an instruction is executed. Introduce instruction formats: memory to memory, register to memory, register to register. Demonstrate how a processor implements conditional behaviour. Cpu: reads instructions from emory and executes them. Register: temporary data is stored in registers such as r0 and r1. Pc: program counter, is the register that points at the next instruction to be executed. Ccr: condition code register, is a collection of ag bits for a processor. A computer executes instruction from 8 bits wide to 80 bits wide. Format: anatomy of an instruction: #of bits devoted to de ning the operation, #of operands, format of each operand. Stored program machine: a computer that has a program in digital form in its main memory, pc points to the next instruction to be executed and is incremented after each instruction has been executed.
