Appendix B. System Address Maps
Table 51 (Page 2 of 2). Input/Output Address Map
Address (Hex)
Size (Dec)
Description
0378–037F
8 bytes
LPT2
03BC–03BE
4 bytes
LPT1 (system board)
03E8–03EF
8 bytes
COM3 or COM4
03F0–03F5
6 bytes
Floppy channel 0
03F6
1 byte
IDE channel 0
03F7, bit 7
1 bit
Floppy disk change
03F7, bits 6:0
7 bits
IDE status channel 0
03F8–03FF
8 bytes
COM1 (system board)
04D0
1 byte
Interrupt edge/level control 1
04D1
1 byte
Interrupt edge/level control 2
0CF8–0CFB
4 bytes
PCI configuration address register
0CF9
1 byte
Reset control register
0CFC–0CFF
4 bytes
PCI configuration data register
Appendix B. System Address Maps
55