AXIOMTEK AX12270, User Manual

Page: 32 / 68

AX12270 PC/104 Module Series User’s Manual
26 Hardware Description
3.5 I/O Port Address Map
The CPU card communicates via I/O ports. A total 1KB port
addresses can be assigned to other devices via I/O expansion cards.
Address Devices
000-01F DMA controller #1
020-003 Interrupt controller #1
022-023 STPC Specific Registers
040-043 Timer Controller
060 Keyboard controller
061 Port B
064 Kbd Ctlr, CMD, STAT Byte
070 Real Time Clock
071 Real Time Clock Data
078 General Purpose I/O
080-08F DMA page register
0A0-A1 Interrupt controller #2
0C0-0DE DMA controller #1
0F0 Reset Numeric Error
102 VGA Setup Register
170-177 Secondary IDE Channel
1F0-1F7 Primary IDE Channel
2F8-2FF Serial Port 2#2 (COM2)
378-37F Parallel Port 1
3B4, 3B5, 3BA VGA Registers
3D4, 3D5, 3DA VGA Registers
03C-3F5 VGA Registers
3F6 IDE Command Port
3F7 Floopy Command Port
3F8-3FF Serial Port 1#1 (COM1)
CF8 PCI Configuration Address Registers
CFC-CFF PCI Configuration Data Registers
46E8 VGA Add-in mode enable Register