Ampro Corporation 486E ROM-BIOS Installation of the Serial Ports, Serial Port Connectors J11, J13

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Product Reference

ROM-BIOS Installation of the Serial Ports

The ROM BIOS normally supports Serial 1 as the DOS COM1 device, Serial 2 as the DOS COM2 device, and so on. If a serial port is disabled and there is no substitute serial port in the system, the ROM-BIOS assigns the COM designations as it finds the serial ports, starting from the primary serial port and searching to the last one. For example, if Serial 1 is disabled, the ROM-BIOS assigns COM1 to Serial 2 (unless another Serial 1 is discovered). The ROM BIOS scans I/O addresses for serial ports in the following order: 3F8h, 2F8h, 3E8h, and 2E8h.

Serial Port Connectors (J11, J13)

Serial 1 and Serial 2 appears on connector J11. Serial 3 and Serial 4 appear on connector J13. Both connectors are wired the same, J11 for serial 1 and 2, and J13 for serial 3 and 4. Table 2–8 details the connector pinout and signal definitions for both ports. The table also identifies the pin numbers where each signal must be wired for compatibility with standard DB25 and DB9 connectors. A flat ribbon cable connects the header to a standard DB9 connector.

Note

PC serial ports are typically equipped with male DB9 connectors.

2–13

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Contents Little Board/486e Computer Revision Reason for Change Date Table of Contents Page Technical Specifications Index Technical Support IntroductionThis page left intentionally blank Viii Chapter FeaturesGeneral Description CPU/MotherboardVL-Bus Flat Panel/CRT Display Controller Enhanced Embedded-PC BiosEnhanced Parallel Port Serial PortsFloppy Interface IDE InterfaceByte-Wide Socket and Solid State Disk SSD Ethernet LAN InterfaceModular PC/104 Expansion Bus Enhanced ReliabilityHalt Testing Software Little Board Development Platform Overview Interface Connector SummaryConnectors Connector Function Size Key PinConnector and Jumper Locations System I/O Map Jumper Configuration OptionsJumper Group Function Default Address Function Pin Connection DC PowerConnector Type Mating Connector Cooling Requirements Power RequirementsBackup Battery Powerfail Monitor System Memory Map DramMemory Address Function Expanded Memory and Extended MemoryRS-232C Serial Ports Serial Ports J11, J13RS-485 Serial Port AddressesIRQ11 IRQ7 Interrupt AssignmentsSerial Port Connectors J11, J13 ROM-BIOS Installation of the Serial PortsName Pin Ports Pin Signal Function In/Out DB25Pin Signal Name Configuring Serial 2 for RS-485 J6, W5, W6Pin RJ11 Signal Standard Wire Color RS-485 Twisted-Pair Cabling Using RJ11 ConnectorsInterconnection Scheme Examples Using the RS-485 InterfaceSerial Console Hex CommandSerial Handshake COM Port TableUsing a Serial Modem Serial Booting and Serial ProgrammingSelection Address Interrupts Bi-Directional Parallel PortRegister Name Address Primary Secondary Standard and General Purpose I/O Operation ROM-BIOS Installation of Parallel PortsSignal Type Number of Lines Function Output Drive Parallel Port Interrupt Or Function High/Low Pin Parallel Port Interrupt EnableRegister Bit Signal Name In/Out Active J15 J15 Pin Signal Function In/Out DB25 Name Parallel Port Connector J15Register Bit Definitions Signal Name Full Name DescriptionCapacity Drive Size Tracks Data Rate Floppy Disk InterfaceFloppy Drive Considerations Pin Signal Name Function In/Out Floppy Interface ConfigurationFloppy Interface Connector J14 IDE Hard Disk Interface IDE Connector J1225. IDE Drive Interface Connector J12 IDE Interface Configuration Compact Flash Solid-State Disk Master/Slave SettingEnabling the Drive Solid-State Disk PreparationFlat Panel/CRT Video Controller Connecting a CRT J5Name Connector Pins/Type Description Part Description Mating Connector J5 Pin Signal Name DB-15 DB-9W10 +5V Connecting a Flat Panel J3FLM Pin Signal Description NameAdvanced Power Management Power SequencingPgmebios VIDEO=filename Bios Support of Non-Standard PanelsJ4 Pin J3 Pin Description Selecting Vee PolarityLCD Bias Supply Option Ra = 270 Rb = Vee max Vee min / 1.5 Attaching an External Contrast ControlExample Network Terms Ethernet Network InterfaceQNX Installing an Ethernet Boot PromInstalling a Boot Prom Twisted-Pair InstallationsInstalling a Boot Prom in Byte-Wide Socket S0 Twisted Pair Interface J7Using Network Operating Systems NOS Program Name Vendor Function Driver Name Network OS DriversControlling the Ethernet LAN Interface Directly 00 40 Manufacturer’s Ethernet IDByte-Wide Socket S0 SSD Device Size Package Generic Type Pins Part NumberWindow Address ROM-BIOS ExtensionsAddressing the Byte-wide Socket Solid State Disk SSD Drives Accessing the Byte-Wide SocketPerformance Issues Device 64KB Segment Address Size Segments Upper Nibble of BH Typical Devices Pins Jumper Diagram Byte-Wide Socket SignalsW14 Pin Signal Name Description Jumpering the Byte-Wide SocketFlash Eprom Programming Using EPROMsFlash Eprom Typical Devices Pins Jumper Diagram Non-volatile RAM Using SRAMsUtility Connector J16 Exsmi Pin Signal Name FunctionExternal Battery Connections Push Button Reset ConnectionPC Speaker LED ConnectionBattery-Backed Clock WDT Response Watchdog TimerJumper W4 AL,61H AL,NOT 08H OUT 61H,AL Page AT Expansion Bus Onboard MiniModule Expansion Using Standard PC and AT Bus CardsBus Termination Bus Expansion GuidelinesExpansion Bus Connector Pinouts PU/PD/S Pin Signal Function In/Out Current47. AT Expansion Bus Connector, B1-B32 P1 48. AT Expansion Bus Connector, C0-C19 P2 PU/PD/S Interrupt Function Interrupt and DMA Channel UsageEthernet Video Channel FunctionSerial Parallel Floppy Setup Overview Menu Name Functions Standard CMOS/EEPROM Setup Setup Page 1-Standard CMOS/EEPROM SetupDate and Time Drive Parameter SetupFloppy Drives IDE Hard Disk DrivesPage Video Error HaltDram Memory System PostExtended Bios Setup Page 2-Options/Peripheral ConfigurationParallel Port Serial PortPort Address Selection Address InterruptIDE Interface Enable Floppy Interface EnableHot Key Setup Enable Selection AddressBlank Post Test Video StateSerial Boot Loader Enable Byte-Wide Socket ConfigurationWatchdog Timer Configuration Local Bus Video DisplayFlat Panel Display Type Installing a Modified Bios to Support a New PanelExtended Serial Console Configuration Setup Page 3-Serial Console ConfigurationPage Switch Function Creating Configuration Files with SETUP.COMDIR LPT1 Operation with DOSUtility Software Overview Embedded-PC System Enhancements Little Board/486e CPU SpecificationsOnboard Peripherals CRT Support for Standard Video Modes Vesa Font Pixels Clock Horiz Vert Mem Mode MHz KHz Support Software Mechanical and Environmental Specifications Mechanical Dimensions Technical Specifications Page Index Page POST, Setup Little Board/486e Technical Manual Index-4