1-16 Technical Information
Table 1-4 I/O Address Map
Address (Hex)
Size
Description
0290 - 0297
8 bytes
Hardware monitor
02E8 - 02EF
8 bytes
COM4/Video (8514A)
02F8 - 02FF
8 bytes
COM2
0300 - 0301
2 bytes
MPU-401 (MIDI)
0330 - 0331
2 bytes
MPU-401 (MIDI)
0332 - 0333
2 bytes
MPU-401 (MIDI)
0334 - 0335
2 bytes
MPU-401 (MIDI)
0376
1 byte
Secondary IDE channel command port
0377
1 byte
Floppy channel 2 command
0377, bit 7
1 bit
Floppy disk change, channel 2
0377, bits 6:0
7 bits
Secondary IDE channel status port
0378 - 037F
8 bytes
LPT1
0388- 038D
6 bytes
AdLib (FM synthesizer)
03B4 - 03B5
2 bytes
Video (VGA)
03BA
1 byte
Video (VGA)
03BC - 03BF
4 bytes
LPT3
03C0 - 03CA
11 bytes
Video (VGA)
03CC
1 byte
Video (VGA)
03CE - 03CF
2 bytes
Video (VGA)
03D4 - 03D5
2 bytes
Video (VGA)
03DA
1 byte
Video (VGA)
03E8 - 03EF
8 bytes
COM3
03F0 - 03F5
6 bytes
Floppy Channel 1
03F6
1 byte
Primary IDE channel command port
03F7 (Write)
1 byte
Floppy channel 1 command
03F7, bit 7
1 bit
Floppy disk change channel 1
03F7, bits 6:0
7 bits
Primary IDE channel status port
03F8 - 03FF
8 bytes
COM1
04D0 - 04D1
2 bytes
Edge/level triggered PIC
0530 - 0537
8 bytes
Windows Sound System
0604 - 060B
8 bytes
Windows Sound System