Bus control is necessary to handlethe large number of bus transactions that take place ina very short period of time in the computer.
There arebasically two factors that must be taken intoconsideration in bus communications: transferpriority and source/destination of the data beingtransferred.
It is also used forcommunications between the CPU and the processorsupport chipset.
This speed is fine when getting input from a mouse ora keyboard, even for most disk drives.
The biggestproblem with bus speeds has occurred because of theincrease in video resolution, the development of videocapture boards and some network interfaces.
led to the development of the Industry StandardArchitecture (ISA).