SBC856A1 Series All-in-One POS Board User’s Manual
Hardware Description
27
3.4 I/O Port Address Map
TheVIA EDEN CPU communicates via I/O ports. It has a total of 1KB
port addresses available for assignment to other devices via I/O
expansion cards.
Address Devices
000-01F
DMA controller #1
020-03F
Interrupt controller #1
060-06F
Keyboard controller
070-07F
Real time clock, NMI
080-09F
DMA page register
0C0-0DF
DMA controller #2
0F0
Clear math coprocessor busy signal
0F1
Reset math coprocessor
0F8-0FF
Math processor
120~124
1F0-1F7
Fixed disk controller
294~297
PCI Bus
376
IDE Controller
378-37F
Parallel port #1(Default disable)
380-38F
Reserved
3A0-3AF
Reserved
3B0-3DF
VGA card
3F0-3F5
Floppy disk controller
3F8-3FF
Serial port #1 (COM1)
3E8-3EF
Reserved
2F8-2FF
Serial port #2 (COM2)
2E8-2EF
Reserved
4D0~4D1
PCI Bus
CF8~CFF
PCI Bus
E000~E0FE
Enternet
E100~E70E
IDE Controller
E800~EA1E
USB Controller
1nd I/O W83697HF: 2EH
2
nd
I/O W83627: 4EH