Register Map And Miscellaneous Functions; System I/O Map - HP dx7300 Technical Reference Manual

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4.6 Register Map and Miscellaneous Functions

This section contains the system I/O map and information on general-purpose functions of the
ICH8 and I/O controller.

4.6.1 System I/O Map

Table 4-14 lists the fixed addresses of the input/output (I/O) ports.
I/O Port
0000..001Fh
0020..002Dh
002E, 002Fh
0030..003Dh
0040..0042h
004E, 004Fh
0050..0052h
0060..0067h
0070..0077h
0080..0091h
0092h
0093..009Fh
00A0..00B1h
00B2h, 00B3h
00B4..00BDh
00C0..00DFh
00F0h
0170..0177h
01F0..01F7h
0278..027Fh
02E8..02EFh
02F8..02FFh
0370..0377h
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.
4-24
Table 4-14
System I/O Map
Function
DMA Controller 1
Interrupt Controller 1
Index, Data Ports to SCH5317 I/O Controller (primary)
Interrupt Controller
Timer 1
Index, Data Ports to SCH5317 I/O Controller (secondary)
Timer / Counter
Microcontroller, NMI Controller (alternating addresses)
RTC Controller
DMA Controller
Port A, Fast A20/Reset Generator
DMA Controller
Interrupt Controller 2
APM Control/Status Ports
Interrupt Controller
DMA Controller 2
Coprocessor error register
IDE Controller 2 (active only if standard I/O space is enabled for secondary controller)
IDE Controller 1 (active only if standard I/O space is enabled for primary controller)
Parallel Port (LPT2)
Serial Port (COM4)
Serial Port (COM2)
Diskette 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)
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