Intel 8288
Intel 8288
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.[1]
Pin assignment and function for the control lines
| Name | Pin | Input (I), Output (O) |
Function |
|---|---|---|---|
| VCC | 20 | Input power (+5 V) | |
| GND | 10 | Mass (0 V) | |
| S0, S1, S2 | 19, 3, 18 | I | Status Input |
| CLK | 2 | I | Clock |
| AEN | 6 | I | Address Enable |
| CEN | 15 | I | Command Enable |
| 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 |
| INTA | 14 | O | Interrupt Acknowledge |
| DT/R | 4 | O | Data Transmit/Receive |
| DEN | 16 | O | Data Enable |
| MCE/PDEN | 17 | O | MCE (when IOB is LOW), PDEN (wenn IOB is HIGH) |
| ALE | 5 | O | Address Latch Enable |
References
- ↑ "The structure of the original IBM PC's motherboard". tu-chemnitz.de. Retrieved November 27, 2013.