完整端口分布：I/O端口
说明：x86是I/O独立编址的，所以端口号从0x0开始。
另外，常用的PC I/O端口如下：
- 0000-000f Slave DMA controller (8237 chip)
- 0010-001F System
- 0020-0021 First Interrupt controller (8259 chip)
- 0030-0031 Second interrupt controller
- 0040-0043 Programable Interval Timer 1 (8254 chip)
- 0048-004B Programable Interval Timer 2
- 0050-006F System devices
- 0070-0071 NMI Enable / Real Time Clock
- 0080-008B DMA Page registers
- 0090-009F System devices
- 00A0-00A1 Slave interrupt controller
- 00C0-00DE Master DMA controller
- 00F0-00FF System devices
- 0100-0167 System devices
- 0168-016F IDE Interface - Quaternary channel
- 0170-0177 IDE interface - Secondary channel
- 01E8-01EF IDE Interface - Tertiary channel
- 01F0-01F7 IDE interface - Primary channel
- 0200-0207 Games Port (joystick port)
- 0220-022F Usually used by sound cards, also used by NOVEL NETWARE KEY CARD
- 0270-0273 Plug and Play hardware
- 0278-027A Parallel Port *
- 0280-028F Sometimes used for LCD Display I/O
- 02B0-02DF Alternate VGA Video Display Adaptor assignment (secondary
address) - 02E0-02E7 GPIB 0, data aquisition card 0 (02E1 to 02E3 only)
- 02E8-02EF Serial Port - COM 4
- 02F8-02FF Serial Port - COM 2
- 0300-031F Often used as a default for Network Interface cards (was
prototype card) - 0320-023F ST506 and ESDI Hard Disk Drive
Interface (mostly used in PX/XT and early PC/AT) - 0330-0331 MPU-401 (midi) interface, on Sound Cards
- 0360-036F Sometimes used for Network Interface cards
- 0376-0377 Another address used by the
Secondary IDE Controller (see 0170-0177) - 0378-037A Parallel Port *
- 0388-038B FM (sound) synthesis port on sound cards
- 03B0-03BB MDA, EGA and VGA Video Display Adaptor (only 03B0 to 03BB
used) - 03BC-03BF Parallel Port (originally only fitted to IBM mono display
adaptors) * - 03C0-03DF EGA / VGA Video Display Adaptor, (Primary address)
- 03E0-03E7 PCIC PCMCIA Port Controller
- 03E8-03EF Serial Port - COM 3
- 03F0-03F6 Floppy Disk Drive Interface
- 03F7-03f7 Another address used by the Primary IDE Controller (see
01F0-01F7) - 03F8-03FF Serial Port - COM 1
来源：来源
