This fraction was set by the BIOS . In newer systems, the PCI, AGP, and PCI Express peripheral buses often receive their own clock signals, which eliminates their dependence on the front-side bus for timing.
12.
The extra features are integrated memory, PCMCIA, and color LCD controllers connected to an on-die system bus, and five serial I / O channels that are connected to a peripheral bus attached to the system bus.
13.
Parallel communication is and always has been widely used within integrated circuits, in peripheral buses, and in memory devices such as RAM . Computer system buses, on the other hand, have evolved over time : parallel communication was commonly used in earlier system buses, whereas serial communications are prevalent in modern computers.
14.
Although originally created in the late 1960s to connect together automated test equipment, it also had some success during the 1970s and 1980s as a peripheral bus for early microcomputers, notably the Commodore PET . Newer standards have largely replaced IEEE 488 for computer use, but it still sees some use in the test equipment field.
