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The Intel 8288 is a bus controller chip which is designed for Intel-8086/8087/8088/8089. The block is supplied in 20-pin DI. The 8086 (and 8088) operate in maximum mode, so they are configured primarily for multiprocessor operation or for working with coprocessors. They are generated by the 8288.
Pin assignment and function for the control lines
|VCC||20||Input power (+5 V)|
|GND||10||Mass (0 V)|
|S0, S1, S2||19, 3, 18||I||Status Input|
|IOB||1||I||Input/Output Bus Mode|
|MRDC||7||O||Memory Read Command|
|MWTC||9||O||Memory Write Command|
|AMWC||8||O||Advanced Memory Write Command|
|IORC||13||O||I/O Read Command|
|IOWC||11||O||I/O Write Command|
|AIOWC||12||O||Advanced I/O Write Command|
|MCE/PDEN||17||O||MCE (when IOB is LOW), PDEN (wenn IOB is HIGH)|
|ALE||5||O||Address Latch Enable|
- "The structure of the original IBM PC's motherboard". tu-chemnitz.de. Retrieved November 27, 2013.