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Computer Subsystems - Internal Bus Architecture

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Computer Subsystems. TASK 1 A) Internal Bus Architecture Bus Architecture is wires inside a computer where data is taken from one part of the computer to another. This bus connects all the computer components to the processor and main memory. There's also the extended bus, which connects your CD-ROM and Floppy drive to your main board. There are also expansion boards, which go into the main board called AGP, PCI, and CNR ports. These ports connect your graphics card, sound card or modem. All buses are split into two parts called the address bus and the data bus. The data bus transfers the data and the address bus tells the data where to go. The width of the bus is important because it tells you how much data can be transmitted at one time. This bus can transmit 16 or 32 bits at one time. ...read more.


Each instruction has to be fetched, interpreted and executed in turn. Immediate Access Store is basically Random Access Memory (RAM). Any program can randomly access this type of computer memory. Any byte of memory can be accessed without touching the bytes that are being used. RAM is the most common type of memory, which is found in computers and other devices such as printers. C) The Fetch - Decode - Execute Cycle. This cycle is executed when a computer program is activated; the program is a set of instructions. This set of instructions will normally be stored in the Main Memory. It is the job of the processor that controls the computer to decide what action to take with these instructions. At the beginning of a program the Program Counter is set to point at the memory location where the start of the program can be found. ...read more.


The opcode could be e.g. ADD or MOV. The Basic Function of an Operating System The Operating System is the most important program that runs on your computer. Every computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. The operating system has tasks like making sure data is stored in the right memory locations. The operating system acts as a translator which lets the hardware and software to talk to each other. The fetch, execute and decode cycle enables the operating system to start running a program, decode the program and execute the program. TASK 2 A) Instruction R0 R1 555 556 SWI GETINT 5 ���� ���� ���� MOV R1, R0 5 5 ���� ���� STR R1, 555 5 5 5 ���� ADD R1, R1 5 10 5 ���� STR R1, 556 5 10 5 10 HLT ...read more.

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