8 System Resources

5

6

7

Yes

Yes

Yes

8.3Memory 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

 

 

 

 

 

8.4I/O Address Map

The I/O-port addresses of the ETX®-CD are functionally identical with a standard PC/AT.

The following I/O ports are additionally used:

I/O Address

Used for

Available

Comment

 

220-227h

 

COM3

 

 

 

 

Available if external I/O controller not used.

 

228-22Fh

 

 

COM4

 

 

 

 

 

Available if external I/O controller not used.

 

2F8-2FFh

 

COM1

 

No

 

Available if device is disabled in setup

 

 

 

 

Configuration

 

 

 

 

 

 

370-371h

 

 

space for SMC

 

No

 

 

Available if external I/O controller not used.

 

 

 

 

controller

 

 

 

 

 

 

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.5Peripheral Component Interconnect (PCI) Devices

PCI Device

Busmaster

PCI Interrupt

Comment

Audio, USB

 

See IRQ resource

 

 

 

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

 

and Ethernet

 

tables above

 

 

 

 

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

8.6Inter-IC (I2C) 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

 

 

 

 

 

8.7System Management (SM) Bus

Following SM bus addresses are reserved.

SM Bus Address SM Device

Comment

JIDA-Bus-Nr.

10h

SMB Host

Do not use under any circumstances.

1

12h

SMART_CHARGER

Not to be used with any SM bus device except a charger

1

14h

SMART_SELECTOR

Not to be used with any SM bus device except a selector

1

16h

SMART_BATTERY

Not to be used with any SM bus device except a battery

1

A0h

SPD

SDRAM EEPROM

1

 

 

 

 

Kontron User's Guide ETX CD

52

Page 52
Image 52
Intel ETX CD manual Memory Area, I/O Address Map, Peripheral Component Interconnect PCI Devices, Inter-IC I2C Bus