7.4. Ports
| Адреса | Размер | Назначение |
| 0000 - 000F | 16 bytes | PIIX4 - DMA 1 |
| 0020 - 0021 | 2 bytes | PIIX4 - interrupt controller 1 |
| 002E - 002F | 2 bytes | Super I/O controller configuration registers |
| 0040 - 0043 | 4 bytes | PIIX4 - Counter/Timer 1 |
| 0048 - 004B | 4 bytes | PIIX4 - Counter/Timer 2 |
| 0060 | 1 byte | Keyboard Controller Byte - Reset IRQ |
| 0061 | 1 byte | PIIX4 - NMI, Speaker Control |
| 0064 | 1 byte | Keyboard controller, CMD/STAT Byte |
| 0070 | bit 7, 1 bit | PIIX4 - enable NMI |
| 0070 | bits 0-6, 7 bits | PIIX4 - real time clock, address |
| 0071 | 1 byte | PIIX4 - real time clock, data |
| 0078 | 1 byte | Reserved - system board configuration |
| 0079 | 1 byte | Reserved - system board configuration |
| 0080 - 008F | 16 bytes | PIIX4 - DMA page registers |
| 00A0 - 00A1 | 2 bytes | PIIX4 - interrupt controller 2 |
| 00B2 - 00B3 | 2 bytes | APM control |
| 00C0 - 00DE | 31 bytes | PIIX4 - DMA 2 |
| 00F0 | 1 byte | Reset numeric error |
| 0170 - 0177 | 8 bytes | Secondary IDE channel |
| 01F0 - 01F7 | 8 bytes | Primary IDE channel |
| 0200 - 0207 | 8 bytes | Audio/game port |
| 0220 - 022F | 16 bytes | Audio (Sound Blaster compatible) |
| 0240 - 024F | 16 bytes | Audio (Sound Blaster compatible) |
| 0278 - 027F | 8 bytes | LPT2 |
| 0290 - 0297 | 8 bytes | Hardware monitor |
| 02E8 - 02EF | 8 bytes | COM4/Video (8514A) |
| 02F8 - 02FF | 8 bytes | COM2 |
| 0300 - 0301 | 2 bytes | MPU-401 (MIDI) |
| 0330 - 0331 | 2 bytes | MPU-401 (MIDI) |
| 0332 - 0333 | 2 bytes | MPU-401 (MIDI) |
| 0334 - 0335 | 2 bytes | MPU-401 (MIDI) |
| 0376 | 1 byte | Secondary IDE channel command port |
| 0377 | 1 byte | Floppy channel 2 command |
| 0377 | bit 7, 1 bit | Floppy disk change, channel 2 |
| 0377 | bits 0-6, 7 bits | Secondary IDE channel status port |
| 0378 - 037F | 8 bytes | LPT1 |
| 0388 - 038D | 6 bytes | AdLib (FM synthesizer) |
| 03B4 - 03B5 | 2 bytes | Video (VGA) |
| 03BA | 1 byte | Video (VGA) |
| 03BC - 03BF | 4 bytes | LPT3 |
| 03C0 - 03CA | 11 bytes | Video (VGA) |
| 03CC | 1 byte | Video (VGA) |
| 03CE - 03CF | 2 bytes | Video (VGA) |
| 03D4 - 03D5 | 2 bytes | Video (VGA) |
| 03DA | 1 byte | Video (VGA) |
| 03E8 - 03EF | 8 bytes | COM3 |
| 03F0 - 03F5 | 6 bytes | Floppy Channel 1 |
| 03F6 | 1 byte | Primary IDE channel command port |
| 03F7 (Write) | 1 byte | Floppy channel 1 command |
| 03F7 | bit 7, 1 bit | Floppy disk change channel 1 |
| 03F7 | bits 0-6, 7 bits | Primary IDE channel status port |
| 03F8 - 03FF | 8 bytes | COM1 |
| 04D0 - 04D1 | 2 bytes | Edge/level triggered PIC |
| 0530 - 0537 | 8 bytes | Windows Sound System |
| 0604 - 060B | 8 bytes | Windows Sound System |
| LPTn + 400h | 8 bytes | ECP port, LPTn base address + 400h |
| 0CF8 - 0CFB (*) | 4 bytes | PCI configuration address register |
| 0CF9 (**) | 1 byte | Turbo and reset control register |
| 0CFC - 0CFF | 4 bytes | PCI configuration data register |
| 0E80 - 0E87 | 8 bytes | Windows Sound System |
| 0F40 - 0F47 | 8 bytes | Windows Sound System |
| 0FF0 - 0FF7 | 8 bytes | CS4236B audio control |
| FF00 - FF07 | 8 bytes | IDE bus master register |
| FFA0 - FFA7 | 8 bytes | Primary bus master IDE registers |
| FFA8 - FFAF | 8 bytes | Secondary bus master IDE registers |
| 007C | bits 4-5, 2 bits | Chassis fan RPM sense selection |
* DWORD access only
** Byte access only