System Support
|
|
|
|
| Table |
|
| System I/O Map |
|
|
|
| I/O Port | Function |
| 0000..001Fh | DMA Controller 1 |
|
| |
0020..002Dh | Interrupt Controller 1 | |
|
| |
002E, 002Fh | Index, Data Ports to SCH5317 I/O Controller (primary) | |
|
| |
0030..003Dh | Interrupt Controller | |
|
| |
0040..0042h | Timer 1 | |
|
| |
004E, 004Fh | Index, Data Ports to SCH5317 I/O Controller (secondary) | |
|
|
|
| 0050..0052h | Timer / Counter |
|
|
|
| 0060..0067h | Microcontroller, NMI Controller (alternating addresses) |
|
|
|
| 0070..0077h | RTC Controller |
|
|
|
| 0080..0091h | DMA Controller |
|
|
|
| 0092h | Port A, Fast A20/Reset Generator |
|
|
|
| 0093..009Fh | DMA Controller |
|
|
|
| 00A0..00B1h | Interrupt Controller 2 |
|
|
|
| 00B2h, 00B3h | APM Control/Status Ports |
|
|
|
| 00B4..00BDh | Interrupt Controller |
|
|
|
| 00C0..00DFh | DMA Controller 2 |
|
|
|
| 00F0h | Coprocessor error register |
|
|
|
| 0170..0177h | IDE Controller 2 (active only if standard I/O space is enabled for secondary controller) |
|
|
|
| 01F0..01F7h | IDE Controller 1 (active only if standard I/O space is enabled for primary controller) |
|
|
|
| 0278..027Fh | Parallel Port (LPT2) |
|
|
|
| 02E8..02EFh | Serial Port (COM4) |
|
|
|
| 02F8..02FFh | Serial Port (COM2) |
|
|
|
| 0370..0377h | Diskette Drive Controller Secondary Address |
|
|
|
| 0376h | IDE Controller 2 (active only if standard I/O space is enabled for primary drive) |
|
|
|
| 0378..037Fh | Parallel Port (LPT1) |
|
|
|
| 03B0..03DFh | Graphics Controller |
|
|
|
| 03BC..03BEh | Parallel Port (LPT3) |
|
|
|
| 03E8..03EFh | Serial Port (COM3) |
|
|
|
| 03F0..03F5h | Diskette Drive Controller Primary Addresses |
|
|
|
| 03F6h | IDE Controller 1 (active only if standard I/O space is enabled for sec. drive) |
|
|
|
| 03F8..03FFh | Serial Port (COM1) |
|
|
|
| 04D0, 04D1h | Interrupt Controller |
|
|
|
| 0678..067Fh | Parallel Port (LPT2) |
|
|
|
| 0778..077Fh | Parallel Port (LPT1) |
|
|
|
| 07BC..07BEh | Parallel Port (LPT3) |
|
|
|
| 0CF8h | PCI Configuration Address (dword access only ) |
|
|
|
| 0CF9h | Reset Control Register |
|
|
|
| 0CFCh | PCI Configuration Data (byte, word, or dword access) |
NOTE:
Assume unmarked gaps are unused, reserved, or used by functions that employ variable I/O address mapping. Some ranges may include reserved addresses.
4.6.2 GPIO Functions
ICH9 Functions
The ICH9 provides various functions through the use of programmable general purpose input/output (GPIO) ports. These systems use GPIO ports and associate registers of the ICH9 for the following functions:
■PCI interupt request control
| Technical Reference Guide | www.hp.com |