Ampro Corporation MightyBoard 821 manual Address Map, Base Address Function, Address hex Subsystem

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Chapter 3Hardware

Table 3-2. Memory Map

Base Address

 

 

Function

00000000h

-

0009FFFFh

Conventional Memory

 

 

 

 

000A0000h

-

000AFFFFh

Graphics Memory

 

 

 

 

000B0000h

-

000B7FFFh

Mono Text Memory

 

 

 

 

000B8000h

-

000BFFFFh

Color Text Memory

 

 

 

 

000C0000h

-

000CFFFFh

Standard Video BIOS

 

 

 

 

000E0000h

-

000FFFFFh

System BIOS Area (Storage and RAM Shadowing)

 

 

 

 

00100000h

-

04000000h

Extended Memory (If onboard VGA is enabled, then the amount

 

 

 

of memory assigned is subtracted from extended memory.)

 

 

 

 

FFF80000h

-

FFFFFFFFh

System Flash

 

 

 

 

I/O Address Map

Table 3-3shows the I/O address map. These are DOS-level addresses. The OS typically hides these physical addresses by way of memory management.

Table 3-3. I/O Address Map

Address (hex)

Subsystem

000-00F

Primary DMA Controller

 

 

020-021

Master Interrupt Controller

 

 

040-043

Programmable Interrupt Timer (Clock/Timer)

 

 

060-06F

Keyboard Controller

 

 

070-07F

CMOS RAM, NMI Mask Reg, RT Clock

 

 

080-09F

DMA Page Registers

 

 

092

Fast A20 gate and CPU reset

 

 

094

Motherboard enable

 

 

102

Video subsystem register

 

 

0A0-0BF

Slave Interrupt Controller

 

 

0C0-0DF

Slave DMA Controller #2

 

 

0F0-0FF

Math Coprocessor

 

 

1F0-1F8

IDE Hard Disk Controller

 

 

278-27F

Parallel Port

 

 

2E8-2FF

Serial Port 4 (COM4)

 

 

2F8-2FF

Serial Port 2 (COM2)

 

 

378-37F

Parallel Port (Standard and EPP)

 

 

3C0-3DF

VGA

 

 

3E8-3EF

Serial Port 3 (COM3)

 

 

3F8-3FF

Serial Port 1 (COM1)

 

 

778-77A

Parallel Port (ECP Extensions) (Port 378+400)

 

 

CF8-CFF

PCIe bus Configuration Address and Data

 

 

MightyBoard 821

Reference Manual

17

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Contents MightyBoard Single Board Computer Reference Manual Audience Contents Appendix a About This Manual SpecificationsPurpose of this Manual ReferencesChapter MightyBoard Architecture Product OverviewProduct Description Board FeaturesChapter Chapter Major Components ICs Block DiagramChip Type Mfg Model Description Function U10Jack # Signal Description Connector and Header DefinitionsJ16 J15 J17 J18J9 J6 J20 J21 J22 JP1 BT1 Additional ComponentsSpecifications Power SpecificationsJumper Definitions Environmental Specifications Thermal/Cooling RequirementsHumidity Physical Specifications Mechanical SpecificationsDimension Reference Manual MightyBoard Overview HardwareInterrupt Channel Assignments Memory MapDevice vs IRQ No Base Address Function Address MapAddress hex Subsystem CF8-CFFRS485 Serial Port Implementation Serial InterfacesPin # Signal Description Keyboard Interface Keyboard/Mouse InterfacesMouse Interface USB InterfacesUSB 2.0 Support Legacy USB SupportAudio Interface Video InterfacesUSBP4+ Lvds Interface Pin # Signal Description Line ChannelUtility Interface Temperature Monitoring External Battery BT1User Gpio Signals J8 MiscellaneousEthernet External LED Serial ConsoleInfrared IrDA Port Watchdog Timer Power InterfacesATX Power Supply Interface Irrx GNDPower-On Switch Power and Sleep StatesOptional CPU Fan Optional System FanSleep States Acpi Chapter Hardware Entering Bios Setup VGA Display Bios SetupEntering Bios Setup Remote Access IntroductionLogo Screen Image Requirements Logo screenMethod Contact Information Appendix a Technical SupportAppendix a