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Memory area, I/o address map, Peripheeral component interconnect (pci) devices – Kontron COMe-bCD2 User Manual

Page 46: Inter ic (i, C) bus, 4 i/o address map, 5 peripheeral component interconnect (pci) devices, 6 inter ic (i

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9 System Ressources

Kontron User's Guide ETXexpress® CD

46

9.3

Memory Area

Upper Memory

Used for

Available

Comment

C0000h – CFFFFh

VGA BIOS

No

D0000h – DDFFFh

Yes

shadow RAM (ISA bus restriction)

DE000h – DFFFFh

USB registers

No

E0000h – FFFFFh

System BIOS

No

9.4

I/O Address Map

The I/O-port addresses of the COMe-bCD2 are functionally identical with a standard PC/AT.

The following I/O ports are additionally used:

I/O Address

Used for

Available

Comment

2e-2fh

Winbond external
I/O controller

No

Available if external I/O controller not used.

4e-4fh

TPM

No

Available if TPM not populated.

2F8-2FFh

COM1

No

Available if device is disabled in setup

3F8-3FFh

COM2

No

Available if device is disabled in setup

1000h >

PCI

No

I/O ports 1000h and above might be allocated by PCI devices or
onboard hardware.

9.5

Peripheeral Component Interconnect (PCI) Devices

PCI Device

Busmaster

PCI Interrupt

Comment

Audio, USB

and Ethernet

See IRQ

resource tables

above

Integrated in the Intel chipset. No REQx/GNTx
pair needed.

Note:

You can use REQ0/GNT0, REQ1/GNT1, REQ2/GNT2, and REQ3/GNT3 pairs for external PCI devices.

9.6

Inter IC (I

2

C) Bus

I2C Address

Used For

Available

Comment

JIDA-Bus-Nr.

A0h

JIDA-EEPROM

No

EEPROM for CMOS data.

0

A2h

JIDA-EEPROM

No

0

B0h

WD-PIC

No

Reserved for internal use.

0