In order to make computer products a nationwide plug-and-play industrial assembly, the computer industry has developed many industrial standard buses in recent decades. The advantages are obvious: to ensure that peripherals can be connected to any new computer.
1. What is a standard:
a. Mechanical structure, size, and pin location;
b, The width of the data line and address line, and the transfer scale;
c, the number of bus master devices;
d. Timing control mode, synchronous, asynchronous, semi-synchronous.
2. Commonly used industrial standard bus
a, PC bus-standard bus IBMPC/-XT 20-bit address line, 8-bit data line; IBMPC-AT bus, EISA 16 Bit;
b, IPI-Intelligent Peripheral Interface intelligent peripheral interface;
c, Small computer system interface (SCSI);
d, PCI bus ( Peripheral componet Interconnect)
It is formulated by the standardization organization or proposed by the industry or large companies, and has become an industry standard.
The development of microcomputer bus: ISA (Industry Standard Architecture)
EISA (Extended Industry Standard Archilecture)