User`s guide

Appendix A
51
KEEX-2030 User’s Manual
I/O Address Map
I/O Address
Used For
Comment
00h – 0Fh
C0h – DFh
8237DMA Controller
20h, 21h
8259A PIC
2Eh, 2Fh
SuperIO Access Port
A0h, A1h
8259A PIC
40h – 43h (XT/AT)
44h – 47h (PS/2)
8254PIT
60h – 64h
KeyBoard Controller
90h – 96h
PS/2 P OS
F0h – FFh
Math Co-Processor, X87 Unit
170h – 177h
Secondary IDE
1F0h – 1F7h
Primary IDE
200h – 22Fh
GAME I/O
220h – 22Fh
Sound Blaster / AD Lib
279h, A79h
Plug and Play Configuration
Register
A15h, A16h
HW Monitor Access Port
2E8h – 2EFh
COM4
2F8h – 2FFh
COM2
378h – 37Ah
Parallel Printer Port
3B0h – 3BFh
MDA / MGA
3C0h – 3CFh
EGA / VGA
3D4h – 3D9h
CGA/CRT Register, Controller and
Palette Register
3F0h – 3F7h
Floppy Diskette
3F6h, 3F7h
Enhanced IDE
3E8h – 3EFh
COM3
3F8h – 3FFh
COM1
0CF8h
PCI Configuration
Register/address
0CFCh
PCI Configuration Register/data
ISA I/O Port
I2C Address
Used For
Comment
2Eh
Super I/O
2Eh
WatchDog
Timer
Reference register in
Super I/O
Hardware Monitor Parameters
IT8781F Pin
Name
Voltage/Temperature
Function/Comments
VIN0
+VCORE
Processor core
voltage