MCA (Micro Channel Architecture) is IBM proprietary bus for PS/2 computers from 1987, with 32-bit data and address bus, bus mastering, and automatic card configuration but incompatible with ISA cards.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground | GND |
| 2 | CD_SETUP | Card setup | I/O |
| 3 | GND | Ground | GND |
| 4 | /CD_SFDBK | Setup feedback | I/O |
| 5 | +5V | 5V power | PWR |
| 6 | D0 | Data bit 0 | I/O |
| 7 | D1 | Data bit 1 | I/O |
| 58 | A31 | Address bit 31 | I/O |
MCA (Micro Channel Architecture) is IBM proprietary bus for PS/2 computers from 1987, with 32-bit data and address bus, bus mastering, and automatic card configuration but incompatible with ISA cards.