Page 40
AmITX-BE-G
7.3.
I/O Map
7.3.1.
I/O Map
Hex Range
Device
000-01F
DMA controller 1, 8237A-5 equivalent
020-02D and 030-03F
Interrupt controller 1, 8259 equivalent
02E-02F
04E-04F
LPC SIO (IT8783E) configuration index/data registers
040-042
050-052
Timer, 8254-2 equivalent
060, 062, 064, 066
8742 equivalent (keyboard)
061
NMI control and status
070-077
Real Time Clock Controller( bit 7 -NMI mask)
080-091
DMA page register
092
Reset (Bit 0)/ Fast Gate A20 (Bit 1)
093-09F
DMA page registers continued
0A0-0B1 and 0B4-0BD
Interrupt controller 2, 8259 equivalent
0B2 and 0B3
APM control
0C0-0DF
DMA controller 2, 8237A-5 equivalent
0F0
Read: PCI and Master abort. Note (1)
Write: FERR#/ IGNNE# /Interrupt controller
2E8-2EF
Serial port 4
2F8-2FF
Serial port 2
3E8-3EF
Serial port 3
3F8-3FF
Serial port 1
B00
SMBUS IO base
CF9
Reset Control register (8 bit I/O)
Note (1):
A read to this address will subtractive decode from PCI, where it will master abort.