Table of Contents
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Address range (hex)
0073
0080
008F
0080 – 008F
0090 – 0091
0092
0093 – 009F
00A0 – 00A1
00A2 – 00BF
00C0 – 00DF
00E0 – 00EF
00F0
00F1 – 016F
0170 – 0177
01F0 – 01F7
0200 – 0207
0220 – 0227
0228 – 0277
0278 – 027F
0280 – 02E7
02E8 – 02EF
02F8 – 02FF
0338 – 033F
0340 – 036F
0370 – 0371
0378 – 037F
0380 – 03B3
03B4 – 03B7
03BA
03BC – 03BE
03C0 – 03CF
03D4 – 03D7
03DA
03D0 – 03DF
03E0 – 03E7
03E8 – 03EF
03F0 – 03F5
03F6
03F7 (Write)
03F7, bit 7
03F7, bits 6:0
38
User Guide
Size (bytes)
Description
1
RTC data
1
POST checkpoint register during POST only
1
Refresh page register
16
DMA page registers
15
General I/O locations, available to PCI bus
1
PS/2 keyboard controller registers
15
General I/O locations
2
Interrupt controller 2
30
APM control
31
DMA 2
16
General I/O locations, available to PCI bus
1
Coprocessor error register
127
General I/O locations, available to PCI bus
8
Secondary IDE channel
8
Primary IDE channel
8
MIDI/joystick port
8
Serial port 3 or 4
80
General I/O locations, available to PCI bus
8
LPT3
102
Available
8
Serial port 3 or 4
8
COM2
8
Serial port 3 or 4
48
Available
2
IDE channel 1 command
8
LPT2
52
Available
4
Video
1
Video
16
LPT1
52
Video
16
Video
1
Video
11
Available
8
Available
8
COM3 or COM4
6
Diskette channel 1
1
Primary IDE channel command port
1
Diskette channel 1 command
1 bit
Diskette disk change channel
7 bits
Primary IDE channel status port
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