Epson ETX-945 user manual I/O Port Address Map, Address Device Description

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5.2I/O Port Address Map

Each peripheral device in the system is assigned a set of I/O port addresses, which also become the identity of the device. The following table lists the I/O port addresses used:

Address

 

Device Description

 

 

 

00000000

- 00000007

DMA Controller

 

 

 

00000000

- 00000CF7

PCI bus

 

 

 

00000010

- 0000001F

Motherboard Resource

 

 

 

00000020

- 00000021

Programmable Interrupt Controller

 

 

 

00000022

- 0000003F

Motherboard Resource

 

 

 

00000040

- 00000043

System Timer

 

 

 

00000044

- 0000005F

Motherboard Resource

 

 

 

00000060

- 00000060

Standard 0 / 02-Key or Microsoft Natural PS/2 Keyboard

 

 

00000061 – 00000061

System Speaker

 

 

 

00000062

- 00000063

Motherboard Resource

 

 

 

00000064

- 00000064

Standard 0 / 02-Key or Microsoft Natural PS/2 Keyboard

 

 

 

00000065

- 0000006F

Motherboard Resource

 

 

 

00000070

- 00000073

System CMOS/real time clock

 

 

 

00000074

- 0000007F

Motherboard Resource

 

 

 

00000080

- 00000090

DMA Controller

 

 

 

00000091

- 00000093

Motherboard Resource

 

 

 

00000094

- 0000009F

DMA Controller

 

 

000000A0 - 000000A1

Programmable Interrupt Controller

 

 

000000A2 - 000000BF

Motherboard Resource

 

 

000000C0 - 000000DF

DMA Controller

 

 

000000E0 - 000000EF

Motherboard Resource

 

 

000000F0 - 000000FF

Numeric Data Processor

 

 

000001F0 - 000001F7

Primary IDE Channel

 

 

 

00000274

- 00000277

ISAPNP Read Data Port

 

 

 

00000279

- 00000279

ISAPNP Read Data Port

 

 

 

00000294

- 00000297

Motherboard Resource

 

 

 

ETX-945 User Manual 1.00

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Contents High-Performance ETX 3.0 Compliant Computer-on-Modules Contents Safe Handling Precautions Important SAFE-HANDLING InformationRAM FeaturesIntroduction USB BiosETX-945 Models Block Diagram Functional OverviewBoard Dimensions, Mounting Holes, and Connectors Board Layout TopBoard Layout Bottom Other Interface Connectors Bus and Interface Connector SummaryETX Bus Connectors Getting Started Configuring the Hardware ETX Development KitsBooting the System Bios Setup UtilityStandard Cmos Features Advanced Bios FeaturesAdvanced Chipset Features Power Management SetupNTSC, PAL Integrated PeripheralsBios Beep Code List 6 PnP/PCI ConfigurationOther Settings and Utilities Operating System DriversInterface Connector Details ETX1 Connector PCI bus signals USB signals Audio interfaceMiscellaneous functions VCCGND ReservedETX2 Connector ETX3 Connector Analog video output TV video outputLCD interface Serial port interfacesKeyboard, mouse, and infrared transceiver interfaces Parallel port interfaceFloppy drive interface LTGIO0 ETX4 Connector Signal Name Signal Function Direction IDE interfacesPower control and management Ethernet portSata Connectors Miscellaneous signalsBios Memory Mapping VGA BiosAppendix System Resources Reference LAN ROMI/O Port Address Map Address Device DescriptionPage Interrupt Request IRQ Lines IRQ Level FunctionBios Post Codes Code FunctionPage Page

ETX-945 specifications

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