![]() The PS/2 platform introduced a second port with the same design as the keyboard port for use to connect a mouse thus the PS/2-style keyboard and mouse interfaces are electrically similar and employ the same communication protocol. The PS/2 keyboard port is electrically and logically identical to the IBM AT keyboard port, differing only in the type of electrical connector used. The PS/2 mouse connector generally replaced the older DE-9 RS-232 "serial mouse" connector, while the PS/2 keyboard connector replaced the larger 5-pin/180° DIN connector used in the IBM PC/AT design. ![]() ![]() Its name comes from the IBM Personal System/2 series of personal computers, with which it was introduced in 1987. The PS/2 port is a 6-pin mini-DIN connector used for connecting keyboards and mice to a PC compatible computer system. ^ Sometimes, mouse Clock for splitter cable.^ Sometimes, mouse Data for splitter cable.^ Keyboard and mouse ports may be combined into a single port which can be used to connect both by splitter cable.
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