Computer Architecture.

Click Here to download or preview Computer Organization and Architecture by William Stallings

9/8/2015 By: Irfan sir lecture 3

AIS Computer:

*Total number of instruction are grouped as 21

*Data transfer -7- instructions

*under conditional branch -2 i instructions.

*conditional branch -2 instructions

*Arithmetic instruction -8 instructions.

*Address modify -2 instructions.

Commercial computers:

*1947 Eckert mouchly computer corporation

UNWAC1 (universal arthritic computer 

*In us Barrett of consur 1950 calculation per second.

*faster

*more memory.

Register

*memory buffer register (UMBR) contains words to be stored

/received to main memory.

*memory address registers (MAR):Specify address in memory of the word to be written from

or read in to MAR.

*Instruction register (IR):contain 8 bit opcoad (operand code)

Instruction buffer register: (IBR):

holds temporary the right hand part of instruction.

*program counter:contains address of next instruction to be fetched.

* accumulator and multiplier  quotients:

temporary holds operands and repeat of ALU.

Computer Architecture.

Click Here to download or preview Computer Organization and Architecture by William Stallings

8/8/2015 By: Irfan sir lecture 2

computer evolution 

first generation (vacuum tubes):

electronic computer integer and Computer (ENIAC)

word first generation purpose computer developed by Eckert and meuchly in university of Pennsylvanian

Aim to develop timely and accurate trajectory tables for weapons

started in 1943 and finished in 1946

decimal

20 accumulators of 10 digits

programmed manually

18,000 vacuum tubes were used 30 tons, 15 square feet 140 kw power

consumption

5000 addition per/sec

 

Von numan machine

devoloped under the supervision of John von Neumann are Princeton institute of advanced studies in 1946 and compleated in 1950

store parograme concept 

main memory storage parograme and data  

ALu operating on binary data 

controle unit and executing them 

input and output aquipment operated by CU

 Refered as AIS computer 

memory 1000*40 bit words 2*20 bit instruction

Computer Architecture.

Click Here to download or preview Computer Organization and Architecture by William Stallings

7/8/2015 By: Irfan sir lecture 1

Architecture:

Architecture refers to those attributes that are visible to the programmed.

i.e the instruction set 

     the number of bits used to represent various data types

     I/O mechanisms o memory

     addressing techniques

Organization:Computer Organization is how various operational units are implemented and inter connected

i.e control signal  

     interfaces  

     memory technology 

organization are differ b/w different version i.e all intel x86 and IBM system 370 share same basic Architecture.

Structure and Function

Structure Structure is the way in which component  are related to each other.

Function ;;function is the operation of individual component 
function All computer major function are 

data processing

data storage ( short long term temporary storage)

data movement (b/w component parts  and out side word)

Control
Structure  Top level structure
four major component i.e CPU , main memory, I/O Systems,  Interconnection 

CPU:  control  the operation of computer
perform data processing functionals
Main memory:stores running program  and data
I/O:more data b/w computer and external environment.
System inter connection:mechanism that provides communication among cpu main memory and I/O
Control unit structure: