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4-20 System Board
I/O Address Map
Address (Hex) I/O Device Name
03CE-03CF Video (VGA)
03D4-03D5 Video (VGA)
03DA Video (VGA)
03E8-03EF COM3
03F0-03F5 Floppy channel 1
03F6 Primary IDE channel command port
03F7 (write) Floppy channel 1 command
03F7, bit 7 Floppy disk change channel 1
03F7, bit 6 through 0 Primary IDE channel status port
03F8-03FF COM1
04D0-04D1 Edge/level triggered PIC
0530-0537 Windows Sound System
0604-060B Windows Sound System
LPT
n
+ 400h ECP port, LPT
n
base address + 400h
0CF8-0CFB* PCI configuration address register
0CF9** Turbo and reset control register
0CFC-0CFF PCI configuration data register
0E80-0E87 Windows sound system
0F40-0F47 Windows sound system
0F86-0F87 Creative Audio configuration
FF00-FF07 IDE bus master register
FFA0-FFA7 Primary bus master registers
FFA8-FFAF Secondary bus master registers
* Only accessible by DWORD accesses.
** Byte access only.