Pamphlet of Computer System Architecture

Topics: Computer, Computer memory, CPU cache Pages: 4 (1281 words) Published: January 31, 2013
Pamphlet of Computer System Architecture (LO3)

Von Neumann architecture-
Model for designing and building computers, based on the following three characteristics: * The computer’s four main sub-systems:
* Memory
* ALU (Arithmetic/Logic Unit)
* Control Unit
* Input/output System (I/O)
* Program is stored in memory during execution.
* Program instructions are executed sequentially.



* Memory, also called RAM (Random Access Memory),
* Consists of many memory cells (storage units) of a fixed size. Each cell has an address associated with it: 0, 1, …
* All accesses to memory are to a specified address. A cell is the minimum unit of access (fetch/store a complete cell). * The time it takes to fetch/store a cell is the same for all cells. * When the computer is running, both

* Program
* Data (variables)
* are stored in the memory.

Answer of Types of Memory:
RAM-RAM is known as Random Access Memory, a type of computer memory that can be accessed randomly. That is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices. RAM is not located inside the processor, but rather mounts into slots on the motherboard. Ram is locate in third part of processor which called as memory address base. There are two different types of RAM: * DRAM (Dynamic Random Access Memory)

* SRAM (Static Random Access Memory).
The two types of RAM differ in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM. DRAM supports access times of about 60 nanoseconds, SRAM can give access times as low as 10 nanoseconds. Despite SRAM being faster,...
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