ASS#1 nid alvin ng BIT-41

Brian D. De Vivar Nov 17,08


Alvin B. Broniola
BIT-41


ASS#1
what is
1.DATA BUS
2.CONTROLL BUS
3.ADDRESS BUS


1. The Data bus - (connections between and within the {CPU}, memory, and peripherals) used to carry {data}. Other connections are the {address bus} and control signals. The width and {clock rate} of the data bus determine its data rate (the number of {bytes} per second it can carry), which is one of the main factors determining the processing power of a computer. Most current processor designs use a 32-bit bus, meaning that 32 bits of data can be transferred at once. Some processors have an internal data bus which is wider than their external bus in order to make external connections cheaper while retaining some of the benefits in processing power of a wider bus.


2.control bus - is (part of) a computer bus, used by CPUs for communicating with other devices within the computer. While the address bus carries the information on which device the CPU is communicating with and the data bus carries the actual data being processed, the control bus carries commands from the CPU and returns status signals from the devices, for example if the data is being read or written to the device the appropriate line (read or write) will be active


3. Control Bus - A collection of wires connecting the CPU with main memory that is used to identify particular locations (addresses) in main memory. The width of the address bus (that is, the number of wires) determines how many unique memory locations can be addressed. Modern PCs and Macintoshes have as many as 36 address lines, which enables them theoretically to access 64 GB (gigabytes) of main memory. However, the actually amount of memory that can be accessed is usually much less than this theoretical limit due to chipset and motherboard limitations