Lecture 13

A computer instruction is a structured package of agreed-upon ______

before an instruction can be executed, it must first be _______ into its micro-codes

Next, each micro-code is ______ to its designated hardware circuitry (ALU, registers) within the CPU ¤ Where it tells the device how to partake in the overall instruction execution

In each ____ (cycle) of the program’s execution:

¤ The CPU fetches a binary machine instruction from the instruction memory,

¤ Decodes it, and ¤ Executes it

As a side effect of the instruction’s execution, the ___ also figures out which instruction to fetch and execute next

¤ The CPU fetches a binary machine instruction from the instruction memory,

¤ Decodes it, and

¤ Executes it.

This repetitive process is sometimes referred to as the _____ cycle

Dividing up a single program so that it can be parallelized to make use of multiple CPUs is an ______ problem in the general case ¤ Although it works well for several classes of problems

A ___ is a hardware communication system used by computer components

In the early days of computers, a bus was simply a set of ______ _______, each carrying an electrical signal ¤ This allowed multiple bits of data to be transferred in parallel; the voltage on each wire represented a single bit

An ______ bus selects the memory address that the CPU wishes to access