I/O Port Map

0x2E/0x2F
0x4E/0x4F
SuperIO Address/Data Port

0x3F8
COM1(Serial Port 1)

0x2F8
COM2(Serial Port 2)

0x3E8
COM3(Serial Port 3)

0x2E8
COM4(Serial Port 4)

0x60/0x64
KBC
  0x60 - Data Port (R/W)
  0x64 - Status Register (R)
  0x64 - Command Register (W)

0x62/0x66
EC

0x70/0x71
CMOS Index/Data Port

0x72/0x73
Extend CMOS Index/Data Port

0x92
FastInit
  bit0 - FastInit
  bit1 - A20 Enable Bar bit
  bit2-7 - Reserved

0xC00/0xC01
PCI Interrupt Index/Data Port

0xCD4/0xCD5
BIOS Data Area(BIOS RAM) Index/Data Port

0xCD6/0xCD7
Power Management Register Index/Data Port

0xCF8/0xCFC
PCI Config Address/Data Port

0xCF9
System Reset Register

參考來源：
AMD Developer Central
OSDev