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3 i/o address map, Table 22: i/o address assignments – Kontron ETXexpress-AI User Manual

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Kontron ETXexpress-AI User’s Guide



71

7.3

I/O Address Map

The I/O-port addresses of the ETXexpress®-AI COM are functionally identical
to those of a standard PC/AT system, so any addresses not mentioned in Table
22 should also be available. All addresses are fixed I/O ranges that are
decoded by the PCH used in this module.

Table 22: I/O Address Assignments

I/O

Address

Read Target

Write Target

Internal

Unit

00h-08h

DMA Controller

DMA Controller

DMA

09h-oEh

Reserved

DMA Controller

DMA

0Fh

DMA Controller

DMA Controller

DMA

10h-18h

DMA Controller

DMA Controller

DMA

19h-1Eh

Reserved

DMA Controller

DMA

1Fh

DMA Controller

DMA Controller

DMA

20h-21h

Interrupt
Controller

Interrupt
Controller

Interrupt

24h-25h

Interrupt
Controller

Interrupt
Controller

Interrupt

28h-29h

Interrupt
Controller

Interrupt
Controller

Interrupt

2Ch-2Dh

Interrupt
Controller

Interrupt
Controller

Interrupt

2E-2F

LPC SIO

LPC SIO

Forwarded
to LPC

30h-31h

Interrupt
Controller

Interrupt
Controller

Interrupt

34h-35h

Interrupt
Controller

Interrupt
Controller

Interrupt

38h-39h

Interrupt
Controller

Interrupt
Controller

Interrupt

3Ch-3Dh

Interrupt
Controller

Interrupt
Controller

Interrupt

40h-42h

Timer/Counter

Timer/Counter

PIT (8254)

43h

Reserved

Timer/Counter

PIT

4E-4F

LPC SIO

LPC SIO

Forwarded
to LPC

50h-52h

Timer/Counter

Timer/Counter

PIT

53h

Reserved

Timer/Counter

PIT

60h

Microcontroller

Microcontroller

Forwarded
to LPC

61h

NMI Controller

NMI Controller

Processor
I/F

62h

Microcontroller

Microcontroller

Forwarded
to LPC

64h

Microcontroller

Microcontroller

Forwarded
to LPC

–66h

Microcontroller

Microcontroller

Forwarded
to LPC