
TME-104-CLR-86DX-R0V2.doc
Rev. 0.2
42(
44
)
5.2
I/O Address Map
The system chipset implements a number of registers in I/O address space. These registers occupy the following
map in the I/O space:
Address Range (hex)
Description
0000h - 000Fh
DMA 8237-1
0010h - 0017h
COM 9
0018h - 001Fh
Empty
0020h - 0021h
PIC 8259-1
0022h - 0023h
6117D configuration port
0024h - 002Dh
Empty
002Eh - 002Fh
Forward to LPC BUS
0030h - 003Fh
Empty
0040h - 0043h
Timer counter 8254
0044h - 0047h
Empty
0048h - 004Bh
PWM counter 8254
004Ch - 004Dh
Empty
004Eh - 004Fh
Forward to LPC BUS
0050h - 005Fh
Empty
0060h
Keyboard data port
0061h
Port B + NMI control port
0062h - 0063h
8051 download 4K address counter
0064h
Keyboard status port
0065h
WatchDog0 reload counter
0066h
8051 download 8bit data port
0067h
WatchDog1 reload counter
0068h - 006Dh
WatchDog1 control register
006Eh - 006Fh
Empty
0070h - 0071h
CMOS RAM port
0072h - 0075h
MTBF counter
0076h - 0077h
Empty
0078h - 007Ch
GPIO port 0,1,2,3,4 default setup
007Dh - 007Fh
Empty
0080h - 008Fh
DMA page register
0090h - 0091h
Empty
0092h
System control register
0093h - 0097h
Empty
0098h - 009Ch
GPIO direction control
00A0h - 00A1h
PIC 8259-2
00A2h - 00BFh
Empty
00C0h - 00DFh
DMA 8237-2
00E0h - 00FFh
Empty
0100h - 0101h
GPCS1 default setting address
0170h - 0177h
IDE1 (IRQ 15)
01F0h - 01F7h
IDE0 (IRQ 14)
0220h - 0227h
COM8 Forward to LPC BUS
0228h - 022Fh
COM7 Forward to LPC BUS
0238h - 023Fh
COM6 Forward to LPC BUS
0278h - 027Fh
Printer port (IRQ 7, DMA 0)