CS代考 COMP 273 – cscodehelp代写
COMP 273
Unit 3 – Circuits, System Board & CPU ~
Lecture 12: Introduction to Circuits and
the System Board
Prof.
COMP 273 Introduction to Computer Systems
Lecture Outline
The Computer
The System Board
The CPU and it’s fetch cycle Data flow
Gates
Truth tables to circuits
(Soul of a )
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COMP 273 Introduction to Computer Systems
The Computer
Readings:
– Notes / System Architecture / 1 The System Board
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COMP 273 Introduction to Computer Systems
The Computer System
Two controlling software exist within the System Unit: the BIOS (Basic Input Output System) and OS. Used to simplify interconnection.
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The CPU and Control hardware are contained within the System Unit. All other items are external devices (called peripherals).
COMP 273 Introduction to Computer Systems
A port is a physical connection between two devices.
Computer Ports
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COMP 273 Introduction to Computer Systems
But what is inside the System Unit?
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COMP 273 Introduction to Computer Systems
System Board Parts
• Power Supply: Converts the AC/DC from the home into the steady current needed in the PC.
• CPU: Central Processing Unit (The Brain) – Math, Logic, Data movement, loops.
• ROM: Read Only Memory – Used to store built-in instructions (like the CMOS), additional instructions for the CPU.
• Battery: Used to help keep the CMOS parameters (including the time).
• RAM: Random Access Memory – Volatile main memory bank, large and slow.
• Bus: A common road for data that interconnects all devices on the motherboard
• CLK: Clock – Beats the processing cycle (2 of them)
• Slot – Connects to devices external to the system board through
cards
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COMP 273 Introduction to Computer Systems
Battery
The System Board
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ROM
COMP 273 Introduction to Computer Systems
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COMP 273 Introduction to Computer Systems
About slots
