User`s guide

A-4 KEEX-2010 Series User Guide
X Memory Mapping
Upper Memory Used fo
r
Commen
t
C0000h - CFFFFh VGA BIOS
D0000h – D1FFFh LAN PXE
E0000h - FFFFFh System BIOS
Table A-3. Memory Mapping
X 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
295h, 296h HW Monitor Access Port
279h , A79h Plug and Play Configuration Register
2E8h – 2EFh COM4
2F8h – 2FFh COM2
3B0h – 3BFh MDA / MGA
3C0h – 3CFh EGA / VGA
3D4h – 3D9h
CGA/CRT Register, Controller and
Palette Register
3E8h – 3EFh COM3
3F0h – 3F7h Floppy Diskette
3F6h, 3F7h Enhanced IDE
3F8h – 3FFh COM1
0CF8h PCI Configuration Register/Address
0CFCh PCI Configuration Register/data
Table A-4. I/O Address Map