Base address is also called I/O port, I/O address, I/O port address and base port.
Common I/O Base Address Device Assignments in IBM PC compatible computers
| Base Address | Device
|
| 0f - 1f | First DMA Controller 8237 A-5
|
| 20 - 3f | First Interrupt Controller 8259A, Master
|
| 40 - 5f | 8254-2
|
| 60 - 6f | 8042, Keyboard
|
| 70 - 7f | Real Time Clock, NMI mask
|
| 80 - 9f | DMA Page Register, 74LS612
|
| 87 | DMA Channel 0
|
| 83 | DMA Channel 1
|
| 81 | DMA Channel 2
|
| 82 | DMA Channel 3
|
| 8b | DMA Channel 5
|
| 89 | DMA Channel 6
|
| 8a | DMA Channel 7
|
| 8f | Refresh
|
| a0 - bf | Second Interrupt Controller 8259A, Slave
|
| c0 - df | Second DMA Controller 8237 A-5
|
| f0 | Clear 80287 Busy
|
| f1 | Reset 80287
|
| f8 - ff | 80287 Math coprocessor
|
| 1f0 - 1f8 | Hard Disk
|
| 200 - 20f | Game Controller/Joystick
|
| 210 - 217 | Expansion Unit
|
| 278 - 27f | LPT2 Parallel port
|
| 280 - 29F | LCDon Wyse 2108 PC SMC Elite default factory setting
|
| 2e8 - 2ef | COM4
|
| 2e1 | GPIB Adapter 0
|
| 2f8 - 2ff | COM2
|
| 2e2 - 2e3 | Data acquisition
|
| 300 - 31f | Prototype Card
|
| 300 - 31f | 3Com EtherLink default factory setting
|
| 320 - 32f | XT Hard disk interface
|
| 378 - 37f | LPT1 Parallel port
|
| 380 - 38c | SLDC/Secondary Bi-sync interface
|
| 3a0 - 3a9 | Primary Bi-sync interface
|
| 3b0 - 3bb | Monochrome display
|
| 3c0 - 3cf | EGA disiplay control
|
| 3d0 - 3df | Color/Graphics Display (CGA)
|
| 3e8 - 3ef | COM3
|
| 3f0 - 3f7 | Floppy disk controller
|
| 3f8 - 3ff | COM1
|
See also
External links
