Ampro Corporation 486E manual Serial Console, Hex Command

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Little Board™/486e Technical Manual

Multidrop Network

More than two devices share an RS-485 signal pair, for both transmission and reception of data. Only one device is permitted to talk at any one time. As with simple bi-directional communication, the board’s RS-485 transceiver is placed in receive mode unless it is the one permitted to transmit. One popular way of managing who is the transmitter is by a “token” passing scheme. Each node is assigned an ID number. Whoever transmits also sends the ID of the next node allowed to transmit. If a node does not need to transmit, it just immediately sends the “token” to its next node. This simple scheme is easy to implement and trouble free. Time-outs can be implemented in software to prevent a lockup should a node fail to pass the token properly.

Serial Console

Ampro’s unique ROM BIOS support for a serial console consisting of a keyboard and display replaces conventional video controllers, monitors, and keyboards. To use the serial console features, connect the serial console device(s) to Serial 1 or Serial 2. Use SETUP to configure the

Little Board/486e CPU to use its serial console support feature. The configuration memory stores serial console configuration parameters.

Caution

Be careful when changing the console configuration using SETUP. If you specify “None” for console input and output, there is no console access to the system. (You can recover from this state by removing the serial console plug from the primary serial port connector and shorting pins J11-7/8.)

SETUP provides separate configurations for serial console input and outputs (I/Os) so that either input or output or both input and output are possible from any serial port and it’s attached serial device.

To use an ASCII terminal as the console device for your system, set both the I/O parameters to Serial Port 1 (or 2), and set the serial baud rate, data length, and stop bits to match the setting of your terminal. For proper display of SETUP and POST messages from the BIOS, you must use an IEEE-compatible terminal that implements the standard ASCII cursor commands. The required commands and their hexadecimal codes are listed in Table 2–14.

Table 2–14. Required Commands

Hex

Command

 

 

08

Backspace

 

 

0A

Line Feed

 

 

0B

Vertical Tab

 

 

0C

Non-destructive Space

 

 

0D

Carriage Return

 

 

2–18

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Contents Little Board/486e Computer Revision Reason for Change Date Table of Contents Page Technical Specifications Index Introduction Technical SupportThis page left intentionally blank Viii General Description FeaturesChapter CPU/MotherboardEnhanced Embedded-PC Bios VL-Bus Flat Panel/CRT Display ControllerFloppy Interface Serial PortsEnhanced Parallel Port IDE InterfaceEthernet LAN Interface Byte-Wide Socket and Solid State Disk SSDEnhanced Reliability Modular PC/104 Expansion BusHalt Testing Software Little Board Development Platform Interface Connector Summary OverviewConnector Function Size Key Pin ConnectorsConnector and Jumper Locations Jumper Group Function Default Jumper Configuration OptionsSystem I/O Map Address Function Connector Type Mating Connector DC PowerPin Connection Backup Battery Power RequirementsCooling Requirements Powerfail Monitor Dram System Memory MapExpanded Memory and Extended Memory Memory Address FunctionRS-485 Serial Port Serial Ports J11, J13RS-232C Serial Ports AddressesInterrupt Assignments IRQ11 IRQ7ROM-BIOS Installation of the Serial Ports Serial Port Connectors J11, J13Ports Pin Signal Function In/Out DB25 Name PinConfiguring Serial 2 for RS-485 J6, W5, W6 Pin Signal NameRS-485 Twisted-Pair Cabling Using RJ11 Connectors Pin RJ11 Signal Standard Wire ColorUsing the RS-485 Interface Interconnection Scheme ExamplesHex Command Serial ConsoleCOM Port Table Serial HandshakeSerial Booting and Serial Programming Using a Serial ModemRegister Name Address Primary Secondary Bi-Directional Parallel PortSelection Address Interrupts Signal Type Number of Lines Function Output Drive ROM-BIOS Installation of Parallel PortsStandard and General Purpose I/O Operation Parallel Port Interrupt Register Bit Signal Name In/Out Active J15 Parallel Port Interrupt EnableOr Function High/Low Pin Parallel Port Connector J15 J15 Pin Signal Function In/Out DB25 NameSignal Name Full Name Description Register Bit DefinitionsFloppy Drive Considerations Floppy Disk InterfaceCapacity Drive Size Tracks Data Rate Floppy Interface Connector J14 Floppy Interface ConfigurationPin Signal Name Function In/Out IDE Connector J12 IDE Hard Disk Interface25. IDE Drive Interface Connector J12 IDE Interface Configuration Enabling the Drive Master/Slave SettingCompact Flash Solid-State Disk Solid-State Disk PreparationName Connector Pins/Type Description Connecting a CRT J5Flat Panel/CRT Video Controller J5 Pin Signal Name DB-15 DB-9 Part Description Mating ConnectorConnecting a Flat Panel J3 W10 +5VPin Signal Description Name FLMPower Sequencing Advanced Power ManagementBios Support of Non-Standard Panels Pgmebios VIDEO=filenameLCD Bias Supply Option Selecting Vee PolarityJ4 Pin J3 Pin Description Attaching an External Contrast Control Ra = 270 Rb = Vee max Vee min / 1.5Example Ethernet Network Interface Network TermsInstalling an Ethernet Boot Prom QNXInstalling a Boot Prom in Byte-Wide Socket S0 Twisted-Pair InstallationsInstalling a Boot Prom Twisted Pair Interface J7Using Network Operating Systems NOS Controlling the Ethernet LAN Interface Directly Network OS DriversProgram Name Vendor Function Driver Name Manufacturer’s Ethernet ID 00 40SSD Device Size Package Generic Type Pins Part Number Byte-Wide Socket S0Addressing the Byte-wide Socket ROM-BIOS ExtensionsWindow Address Performance Issues Accessing the Byte-Wide SocketSolid State Disk SSD Drives Device 64KB Segment Address Size Segments Upper Nibble of BH W14 Pin Signal Name Description Byte-Wide Socket SignalsTypical Devices Pins Jumper Diagram Jumpering the Byte-Wide SocketFlash Eprom Typical Devices Pins Jumper Diagram Using EPROMsFlash Eprom Programming Using SRAMs Non-volatile RAMUtility Connector J16 Pin Signal Name Function ExsmiPC Speaker Push Button Reset ConnectionExternal Battery Connections LED ConnectionBattery-Backed Clock Jumper W4 Watchdog TimerWDT Response AL,61H AL,NOT 08H OUT 61H,AL Page AT Expansion Bus Using Standard PC and AT Bus Cards Onboard MiniModule ExpansionBus Expansion Guidelines Bus TerminationExpansion Bus Connector Pinouts Pin Signal Function In/Out Current PU/PD/S47. AT Expansion Bus Connector, B1-B32 P1 48. AT Expansion Bus Connector, C0-C19 P2 PU/PD/S Interrupt and DMA Channel Usage Interrupt FunctionSerial Parallel Floppy Channel FunctionEthernet Video Setup Overview Menu Name Functions Setup Page 1-Standard CMOS/EEPROM Setup Standard CMOS/EEPROM SetupFloppy Drives Drive Parameter SetupDate and Time IDE Hard Disk DrivesPage Dram Memory Error HaltVideo System PostSetup Page 2-Options/Peripheral Configuration Extended BiosPort Address Serial PortParallel Port Selection Address InterruptHot Key Setup Enable Floppy Interface EnableIDE Interface Enable Selection AddressVideo State Blank Post TestWatchdog Timer Configuration Byte-Wide Socket ConfigurationSerial Boot Loader Enable Local Bus Video DisplayInstalling a Modified Bios to Support a New Panel Flat Panel Display TypeSetup Page 3-Serial Console Configuration Extended Serial Console ConfigurationPage Creating Configuration Files with SETUP.COM Switch FunctionOperation with DOS DIR LPT1Utility Software Overview Little Board/486e CPU Specifications Embedded-PC System EnhancementsOnboard 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