https://github.com/ravi-prakash1907/computer-system-architecture
A B.Sc. (Hons) Computer Science syllabased based programs and required tools' collection.
https://github.com/ravi-prakash1907/computer-system-architecture
assembly-language college computer-architecture csa
Last synced: 9 months ago
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A B.Sc. (Hons) Computer Science syllabased based programs and required tools' collection.
- Host: GitHub
- URL: https://github.com/ravi-prakash1907/computer-system-architecture
- Owner: ravi-prakash1907
- License: gpl-3.0
- Created: 2019-08-26T07:10:47.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2021-12-09T10:41:00.000Z (over 4 years ago)
- Last Synced: 2023-03-09T05:16:17.186Z (over 3 years ago)
- Topics: assembly-language, college, computer-architecture, csa
- Language: HTML
- Homepage: https://ravi-prakash1907.github.io/Computer-System-Architecture/
- Size: 7.29 MB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: Readme.md
- License: LICENSE
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README
# Computer-System-Architecture
---
## Index
[_View source code of this repository on GitGub_](https://github.com/ravi-prakash1907/Computer-System-Architecture/)
>
> 1. [Sample Machines](https://github.com/ravi-prakash1907/Computer-System-Architecture/tree/master/Machines)
> - For [Diret Instruction-Set](https://github.com/ravi-prakash1907/Computer-System-Architecture/tree/master/Machines/2061_Direct_Ravi)
> - For [Indiret Instruction-Set](https://github.com/ravi-prakash1907/Computer-System-Architecture/tree/master/Machines/2061_Indirect_Ravi)
> 2. [Solutions to the Practicle Programs](https://github.com/ravi-prakash1907/Computer-System-Architecture/tree/master/Operations%20for%20Programs)
> 3. [Download _CPUSim 3.6.9_](https://github.com/ravi-prakash1907/Computer-System-Architecture/raw/master/CPUSim3.6.9%20Downloadable.tar.gz)
> 4. [CPUSim Official](https://www.cs.colby.edu/djskrien/CPUSim/)
>
---
## Practical List
## The Header:
{ **[OP-Code] [---ADDR---]** }
OP-Code: It's operation code of the instruction which is of 4-bits usually
ADDR: It's the address field where the actual data is stored & has a size of 12-bits
## Registers in CPU:
```
1. AC
Accumulator Counter
16-bits
Mainly used for final computation
2. PC
Program Counter
12-bits
Used to store of next step i.e. to be executed
3. IR
Information Register
16-bits
Keeps **entire** data instructions
4. DR
Data Register
16-bits
It stores actual data (_eg. y = 10_)
5. AR
Address Register
12-bits
The address is stored here
6. I
Index
1-bit
Stores the **index** of value/data
7. S
Switch i.e. flip-flop
1-bit
Stores instruction about Start/Stop flip-flop
8. E
Extra
1-bit
It stores the carry-bit (_eg. while adding 1+1, E will store '1'_)
```
---
## Instruction cycle for the execution of any program:
a. **Fetch**:
_An instruction if fetched from the memory_
b. **Decode**:
_Decodes the fetched instruction_
c. **Read**:
_The effective i.e. actual address is extracted from the memory_
_It's an instruction that has an Indirect address_
d. **Execution**:
_Finally the fetched instruction is executed_