3-group by Bakdaulet

bakdauletbayaliev — 2016-09-21 06:56:49 UTC

How does it all fit together?
https://en.wikibooks.org/wiki/A-level_Computing_2009/AQA/Computer_Components,_The_Stored_Program_Concept_and_the_Internet/Machine_Level_Architecture/Structure_and_role_of_the_processor#How_does_it_all_fit_together.3F

Increasing perfomance

2016-09-21 07:00:41 UTC

If we want to increase the performance of our computer, we can try several things

Increasing the clock speed
Adjusting word length
Increasing bus widths

Arithmetic logic unit

askar190999 — 2016-09-21 07:00:54 UTC

Digital circuit that performs arithmetic and logical operations

askar190999 — 2016-09-21 07:02:07 UTC

ADD ;add one number to another number
SUB ;subtract one number to another number
INC ;increment a number by 1
DEC ;decrements a number by 1
MUL ;multiply numbers together
OR  ;boolean algebra function
AND ;boolean algebra function
NOT ;boolean algebra function
XOR ;boolean algebra function
JNZ ;jump to another section of code if a number is not zero (used for loops and ifs)
JZ  ;jump to another section of code if a number is zero (used for loops and ifs)

Control unit

askar190999 — 2016-09-21 07:04:56 UTC

The control unit sits inside the CPU and coordinates the input and output devices of a computer system. It coordinates the fetching of program code from main memory to the CPU and directs the operation of the other processor components by providing timing and control signals.

Clock speed

2016-09-21 07:05:03 UTC

The most obvious way to increase the speed of a computer would be to increase the speed of the computer clock.

Processor Clock

askar190999 — 2016-09-21 07:06:26 UTC

A timing device connected to the processor that synchronises when the fetch, decode execute cycle runs https://commons.wikimedia.org/wiki/File:FrequencyAnimation.gif

Word size

2016-09-21 07:06:38 UTC

Another way to increase the performance of a computer is to increase the word size.

Bus size

2016-09-21 07:07:52 UTC

Bus Size - The number of bits of information a bus can carry at one time (the number of wires making up a bus)

Clock speed

askar190999 — 2016-09-21 07:07:56 UTC

The number of cycles that are performed by the CPU per second

General purpose and dedicated registers

askar190999 — 2016-09-21 07:09:08 UTC

Registers - a small amount of fast storage which is part of the processor

There are also 4 registers in particular that you need to know, we'll meet them in more detail in the next chapter:

Program Counter (PC) - an incrementing counter that keeps track of the memory address of which instruction is to be executed next.
Memory Address Register (MAR) - holds the address in memory of the next instruction to be executed
Memory Buffer Register (MBR) - a two-way register that holds data fetched from memory (and ready for the CPU to process) or data waiting to be stored in memory
Current Instruction register (CIR) - a temporary holding ground for the instruction that has just been fetched from memory

A Bus is a connection between different devices. This connection will normally consist of multiple wires along which signals, instructions and data will be carried. In Von Neumann Architecture there is a single bus to manage the connection between the three main components. The System Bus consists of 3 separate buses, each with a specific task that you need to know. This three bus model is an expansion of the Von Neumann architecture showing greater detail.

orazbaevmadi00 — 2016-09-21 07:21:01 UTC