| Address |
Size |
Description |
| 0000-000F |
16 bytes |
PIIX3-DMA 1 |
| 0020-0021 |
2 bytes |
PIIX3-Interrupt controller 1 |
| 002E-002F |
2 bytes |
Ultra I/O configuration registers |
| 0040-0043 |
4 bytes |
PIIX3-Timer 1 |
| 0060 |
1 byte |
Keyboard controller data byte |
| 0061 |
1 byte |
PIIX3-NMI, Speaker control |
| 0064 |
1 byte |
Keyboard controller, CMD/STAT byte |
| 0070, bit 7 |
1 bit |
PIIX3-Enable NMI |
| 0070, bits 6:0 |
7 bits |
PIIX3-Real-Time clock, address |
| 0071 |
1 byte |
PIIX3-Real-Time clock, data |
| 0078 |
1 byte |
Reserved-Board configuration |
| 0079 |
1 byte |
Reserved-Board configuration |
| 0080-008F |
16 bytes |
PIIX3-DMA page register |
| 00A0-00A1 |
2 bytes |
PIIX3-Interrupt controller 2 |
| 00B2 |
1 byte |
APM control port |
| 00B3 |
1 byte |
APM status port |
| 00C0-00DE |
31 bytes |
PIIX3-DMA 2 |
| 00F0 |
1 byte |
Reset numeric error |
| 0170-0177 |
8 bytes |
Secondary EIDE channel |
| 01F0-01F7 |
8 bytes |
Primary EIDE channel |
| 0200-0207 |
8 bytes |
Gameport joystick |
| 0220-022F |
16 bytes |
Audio-WSS |
| 0270-0273 |
4 bytes |
I/O read port for PnP |
| 0278-027B |
4 bytes |
Parallel port 2 |
| 02E8-02EF |
8 bytes |
Serial port 4 |
| 02F8-02FF |
8 bytes |
On-Board serial port 2 |
| 0330-0331 |
2 bytes |
Audio-MPU401 |
| 0376 |
1 byte |
Sec IDE chan cmd port |
| 0377 |
1 byte |
Sec IDE chan Stat Port |
| 0378-037F |
8 bytes |
Parallel port 1 |
| 0388-038B |
4 bytes |
Audio-WSS |
| 03BC-03BF |
4 bytes |
Parallel port 3 |
| 03E8-03EF |
8 bytes |
Serial port 3 |
| 03F0-03F5 |
6 bytes |
Floppy channel 1 |
| 03F6 |
1 byte |
Pri IDE channel command port |
| 03F7 (Write) |
1 byte |
Floppy channel 1 command |
| 03F7, bit 7 |
1 bit |
Floppy disk change channel 1 |
| 03F7, bits 6:0 |
7 bits |
Pri IDE channel status port |
| 03F8-03FF |
8 bytes |
On-Board serial port 1 |
| LPT + 400h |
8 bytes |
ECP port, LPT + 400h |
| 04D0-04D1 |
2 bytes |
Edge/Level INTR control register |
| 0608-060B |
4 bytes |
Audio-WSS |
| 0CF8-0CFB* |
4 bytes |
PCI configuration address register |
| 0CF9 |
1 byte |
Turbo and reset control register |
| 0CFC-0CFF* |
4 bytes |
PCI configuration data register |
| 0F00-0F07 |
8 bytes |
Audio-CS4232 support register |
| FF00-FF07 |
8 bytes |
IDE bus master register |
| FFA0-FFA7 |
8 bytes |
Primary bus master IDE register |
| FFA8-FFAF |
8 bytes |
Sec bus master IDE register |
| * Only accessible by DWORD accesses |
