Register Map And Miscellaneous Functions; System I/O Map; Register Map And Miscellaneous Functions (4.8) - Compaq W4000 Technical Reference Manual

4.8

REGISTER MAP AND MISCELLANEOUS FUNCTIONS

This section contains the system I/O map and information on general-purpose functions of the
ICH2 and I/O controller.
4.8.1

SYSTEM I/O MAP

Table 4-17 lists the fixed addresses of the input/output (I/O) ports.
Table 4-17. System I/O Map
I/O Port
0000..001F h
0020..002D h
002E, 002F h
0030..003D h
0040..0042 h
004E, 004F h
0050..0052 h
0060..0067 h
0070..0077 h
0080..0091h
0092h
0093..009Fh
00A0..00B 1h
00B2h, 00B 3h
00B4..00BDh
00C0..00DFh
00F0h
0170..0177 h
01F0..01F7 h
0278..027F h
02E8..02EFh
02F8..02FFh
0370..0377 h
0376h
0378..037Fh
03B0..03DFh
03BC..03BEh
03E8..03EFh
03F0..03F5h
03F6h
03F8..03FFh
04D0, 04D1h
0678..067Fh
0778..077Fh
07BC..07BEh
0CF8h
0CF9h
0CFCh
NOTE:
Assume unmarked gaps are unused, reserved, or used by functions that employ variable I/O
address mapping. Some ranges may include reserved addresses.
Table 4-17.
System I/O Map
Fu nction
DMA Controlle r 1
In terrupt Controller 1
Index, Data Ports to LPC4 7B367 I/O Controlle
Interrupt Controlle r
Timer 1
Index, Dat a Ports to LPC47B367 I/O Controller (secondary)
Timer / Cou nter
Microcontroller, NMI Contro ller (alternating addresses)
RTC Controller
DMA Cont roller
Port A, Fast A 20/Reset Generator
DMA Cont roller
Interrupt Controller 2
APM Control/Status P orts
Interrupt Controller
DMA Controller 2
Coprocessor error reg ister
IDE Controller 2 (active only if standard I/O space is enabled for primary drive)
IDE Controller 1 (active only if standard I/O space is enabled for secondary drive)
Pa rallel Port (LPT2)
Serial Port (COM4)
Serial Port (COM2)
Di skette Drive Controller Secondary Address
IDE Controller 2 (active only if standard I/O space is enabled for primary drive)
Parallel Port (LPT1)
Graphics Controller
Parallel Port (LPT3)
Serial Port (COM3)
Diskette Drive Controller Primary Addresses
IDE Controller 1 (active only if standard I/O space is enabled for sec. drive)
Serial Port (COM1)
Interrupt Controller
Parallel Port (LPT2)
Parallel Port (LPT1)
Parallel Port (LPT3)
PCI Configuration Address (dword access only )
Reset Control Register
PCI Configuration Data (byte, word, or dword access)
Compaq Evo and Workstation Personal Computers
Second Edition - January 2003
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