EISA (Extended ISA) extends ISA to 32-bit by adding a second row of contacts in the same slot, backwards compatible with 8-bit and 16-bit ISA cards, used in 386 and 486 servers from 1988 to 1995.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | /IOR | I/O read | I/O |
| 2 | /IOW | I/O write | I/O |
| 3 | GND | Ground | GND |
| 4 | +5V | 5V power | PWR |
| 5 | EX32 | 32-bit data extension | I/O |
| 6 | EX16 | 16-bit data extension | I/O |
| 7 | SLBURST | Slave burst | I/O |
| 8 | MSBURST | Master burst | I/O |
EISA (Extended ISA) extends ISA to 32-bit by adding a second row of contacts in the same slot, backwards compatible with 8-bit and 16-bit ISA cards, used in 386 and 486 servers from 1988 to 1995.