1. Manuals
  2. Brands
  3. MESA Electronic Manuals
  4. Computer Hardware
  5. 4C27
  6. Manual

MESA Electronic 4C27 Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
4C27 CPU MANUAL
VERSION 1.4
Copyright 1997 by MESA ELECTRONICS Richmond, CA. Printed in the United States of
America. All rights reserved. This document and the data disclosed herein is not to be reproduced,
used, disclosed in whole or in part to anyone without the written permission of MESA
ELECTRONICS.
Mesa Electronics
4175 Lakeside Drive, Suite #100
Richmond, CA 94806-1950
Tel (510) 223-9272 - Fax (510) 223-9585
E-Mail: tech@mesanet.com - Website: www.mesanet.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 4C27 and is the answer not in the manual?

Questions and answers

Related Manuals for MESA Electronic 4C27

Summary of Contents for MESA Electronic 4C27

  • Page 1 4C27 CPU MANUAL VERSION 1.4 Copyright 1997 by MESA ELECTRONICS Richmond, CA. Printed in the United States of America. All rights reserved. This document and the data disclosed herein is not to be reproduced, used, disclosed in whole or in part to anyone without the written permission of MESA ELECTRONICS.

  • Page 3: Table Of Contents

    4C27 CPU USER'S MANUAL TABLE OF CONTENTS HANDLING PRECAUTIONS Lithium cell ................
  • Page 4 4C27 CPU USER'S MANUAL TABLE OF CONTENTS ROM-DOS General ................
  • Page 5 4C27 CPU USER'S MANUAL...

  • Page 6: Handling Precautions

    4C27 CPU USER'S MANUAL HANDLING PRECAUTIONS LITHIUM CELL The 4C27 CPU card contains a lithium cell which can create a fire or explosion hazard if improperly handled. Do not expose battery to temperatures in excess of 100 degrees Celsius or dispose of in fire.

  • Page 7: Introduction

    MHz 386SX-compatible CPU/chipset. System RAM can be 2, 4, or 8M bytes depending on model. Flash disk can also be 4, 8, or 16M bytes. The flash disk is supported by the 4C27's BIOS, and appears to the system as a standard disk drive. High performance NAND flash devices are used, giving fast write speeds, and very long life.

  • Page 8: Configuration

    When the words "up", and "down" are used it is assumed that the 4C27 CPU card is oriented with its bus connectors J1 and J2 at the bottom edge of the card (nearest the person doing the configuration).
  • Page 9 4C27 CPU USER'S MANUAL CONFIGURATION DEFAULT JUMPER SETTINGS AND CONNECTOR LOCATIONS Page 9...

  • Page 10: Watchdog Enable

    W5 to the "up" position in order to use the battery backed clock/calendar. The 4C27 BIOS does not use the CMOS setup RAM, so it is possible to run the 4C27 with no Lithium cell if desired.

  • Page 11: Connectors

    (+5V only) 3.5 inch floppy drives. Since the power connector on the 4C27 may power the whole PC/104 stack, it is suggested that only gold plated connectors be used. Tin plated connectors have a pronounced tendency to fail over time via increased contact resistance when operated at anywhere near their rated current.

  • Page 12: Serial Port Connectors

    KBVCC Keyboard +5V If a keyboard is not used, it is possible to speed up 4C27 boot-up by grounding KBCLK. This informs the BIOS that no keyboard is present. This avoids the 2-3 second wait for keyboard response to the reset command.

  • Page 13: Parallel Port Connector

    +5V user power or key PARALLEL PORT CONNECTOR The 4C27 parallel port connector is P7. The connector for the parallel port uses a 26 pin, 2mm header to save space. The 26 pin connector arrangement is such that when terminated with a standard DB 25 connector, the parallel port pinout matches the IBM standard pinout.
  • Page 14 4C27 CPU USER'S MANUAL CONNECTORS PARALLEL PORT Parallel port connector pin-out is as follows: HEADER PIN DSUB PIN SIGNAL FUNCTION /PSTB Strobe (out) /PAFD Auto LF (out) /PD0 Data 0 /PERROR Printer error (in) Data 1 /PINIT Reset printer (out)

  • Page 15: Floppy Connector

    CONNECTORS FLOPPY CONNECTOR The 4C27 floppy connector (P6) is a 20 pin 2mm connector in order to save space. An adapter is available from MESA to connect to standard 34 pin .1" floppy drives (FLOPADPT).The connector pinout is as follows:...

  • Page 16: Cpu Operation

    CPU when idle. An example program (STOPCLK.COM) is provided to demonstrate stopping the CPU clock. If the absolute lowest power consumption is required, Mesa can supply a version of the 4C27 that uses a lower power PAL. Please contact MESA for more information on this low power CPU version.

  • Page 17: Serial Ports

    ATA (PCMCIA format) removeable drives. Hard drives are added to the 4C27 drive list after local flash drives. For example if you have a two drive flash disk system, the flash drives would be assigned letters C: and D: and the hard drive would become E: If ROM-DOS is used, The ROM drive (with COMMAND.COM etc.) is always assigned the last...

  • Page 18: Ethernet Interface

    Do not install the RPL boot ROM image unless you are sure you can support it, as you cannot abort the net load and boot from floppy. This will leave you with a broken 4C27 until you get a new BIOS chip .

  • Page 19: Setup Storage

    UTILS directory of the distribution disk. This file has all of the available setup options specified. Normal usage of the 4C27.CF file is to leave all of the options in the file, but comment out the undesired options. options can be commented out by preceding the line with a semicolon.

  • Page 20: Set4Csio

    The command line parameter is the name of the configuration file. The configuration file is an ASCII file containing the configuration parameters. The UTILS directory of the 4C27 distribution disk has two example configuration files, COM3COM4.CFG and STANDARD.CFG. You should use these files as a starting point to creating your own configuration files.
  • Page 21 4C27 CPU USER'S MANUAL CPU OPERATION SETCTSIO PARAMETER PARAMETER VALUES DEFAULT PRIMSER-ENABLE This parameter enables or disables the primary serial port. PARAMETER PARAMETER VALUES DEFAULT SECSER-ENABLE This parameter enables or disables the secondary serial port. PARAMETER PARAMETER VALUES DEFAULT COM3&4-ADDRESS...
  • Page 22 4C27 CPU USER'S MANUAL CPU OPERATION SETCTSIO PARAMETER PARAMETER VALUES DEFAULT SECSER-ADDRESS COM3 COM4 Sets the address of the secondary serial port (The port connected to P3). If set to COM3 or COM4, the address is determined by the COM3&4-ADDRESS parameter.

  • Page 23: Serial File Download

    If you do not wish to make a cable, a down load adaptor cable is available from MESA. The part name is DWLDADPT. This is a five foot cable with a 10 pin header on one end (the 4C27 end) and a female 9 pin D connector at the other end.

  • Page 24: Console Switching

    CONSOLE SWITCHING To simplfy system initialization, the 4C27 will use the COM1 serial port as the console if no video adaptor is found at system startup. The default baud rate is 9600. This console re-direction can be disabled in the EEPROM setup if desired.

  • Page 25: General

    ROM drive that is part of the BIOS image. This drive is always the last physical hard drive in the system. In other words,, if you have a 4C27 with a flash drive (Drive C:) and an IDE drive (Drive D:), this ROM drive would be drive E:.

  • Page 26: Reliability

    DISK EMULATOR OPERATION GENERAL The 4C27 has an optional built in nonvolatile disk emulator with a capacity of up to 16M bytes using NAND flash devices . The 4C27 disk emulator is viewed as a hard disk by system software. This means that the first emulated drive will be drive C: , and the next emulated drive will be drive D:.

  • Page 27: Disk Emulator Initialization

    INITRMDB /CStartChip /NNumberOfChips /T Where StartChip is 0 or 1, NumberOfChips is 1 or 2 On the 4C27, there are 1 or 2 chips. If you want to initialize a 2 chip disk emulator , the INITRMDB command would be:...

  • Page 28: I/O Connector Orientation

    I/O CONNECTOR ORIENTATION The serial port connectors on the 4C27 are 10 pin, right angle .1" headers. Pin 10 of the serial port connector can be cut, and a keying plug installed in the cable mount header if desired to prevent reverse installation of the serial cables.

  • Page 29: Reference Information

    4C27 CPU USER'S MANUAL REFERENCE INFORMATION SPECIFICATIONS UNIT POWER SUPPLY Voltage Supply current (full speed) Supply current (sleep mode) BUS LOADING AND DRIVE: Input capacitance Input leakage current Output drive capability Output sink current ENVIRONMENTAL: Operating temperature range -I version...

  • Page 30: Warranty

    4C27 CPU USER'S MANUAL REFERENCE INFORMATION WARRANTY Mesa Electronics warrants the products it manufactures to be free effects in material and workmanship under normal use and service for the period of 2 years from date of purchase. This warranty shall not apply to products which have been subject to misuse, neglect, accident, or abnormal conditions of operation.

  • Page 31: Schematic Diagrams

    4C27 CPU USER'S MANUAL REFERENCE INFORMATION SCHEMATIC DIAGRAMS Page 31...
  • Page 32 4C27 CPU USER'S MANUAL Page 32...

Table of Contents