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Table 1-4 I/O Address Map*
Address (Hex)
0376
0377
0377, bit 7
0377, bit 6 through 0
0378-037F
0388-038D
03B4-03B5
03BA
03BC-03BF
03C0-03CA
03CC
03CE-03CF
03D4-03D5
03DA
03E8-03EF
03F0-03F5
03F6
03F7 (write)
03F7, bit 7
03F7, bit 6 through 0
03F8-03FF
04D0-04D1
0530-0537
0604-060B
LPT n + 400h
0CF8-0CFB**
0CF9***
* In Plug and Play systems, these addresses are typical but may vary by configuration.
** Only accessible by DWORD accesses.
*** Byte access only.
I/O Device Name
Secondary IDE channel command port
Floppy Channel 2 command
Floppy Disk Change, Channel 2
Secondary IDE channel status port
Parallel port 1
AdLIB (FM synthesizer)
Video (VGA)
Video (VGA)
Parallel port 3
Video (VGA)
Video (VGA)
Video (VGA)
Video (VGA)
Video (VGA)
COM3
Floppy channel 1
Primary IDE channel command port
Floppy channel 1 command
Floppy disk change channel 1
Primary IDE channel status port
COM1
Edge/level triggered
Windows sound system
Windows sound system
ECP port, LPT n base address + 400h
PCI configuration address register
Turbo and reset control register
Technical Information
1-13
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Troubleshooting
