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SeaLevel ACB 56 User Manual

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ACB 56
User Manual | 4021
1
© Sealevel Systems, Inc.
4021 Manual | SL9154 11/2021

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Summary of Contents for SeaLevel ACB 56

  • Page 1 ACB 56 User Manual | 4021 © Sealevel Systems, Inc. 4021 Manual | SL9154 11/2021...

  • Page 2: Table Of Contents

    BEFORE YOU GET STARTED ......................................4 CARD SETUP ............................................6 INSTALLATION ............................................ 11 TECHNICAL DESCRIPTION ......................................13 PROGRAMMING THE ACB 56 ......................................14 SPECIFICATIONS ..........................................17 APPENDIX A – TROUBLESHOOTING ..................................... 18 APPENDIX B – HOW TO GET ASSISTANCE.................................. 19 APPENDIX C –...

  • Page 3: Introduction

    The Sealevel Systems ACB 56 provides the PC with one high speed RS-232 (V.24) or V.35 sync/async port and one RS-232 port suitable for use as a CSU command port. The ACB 56 can be used in a variety of sophisticated communications applications such as SDLC, HDLC, X.25, and high speed async.

  • Page 4: Before You Get Started

    Before You Get Started What’s Included The ACB 56 is shipped with the following items. If any of these items are missing or damaged, contact the supplier. • ACB 56 Adapter Advisory Conventions Warning The highest level of importance used to stress a condition where damage could result to the product, or the user could suffer serious injury.
  • Page 5 Before We Get Started, Continued Factory Default Settings The ACB 56 factory default settings are as follows: Base Address DMA Channels Electrical Specification TX: 1/RX: 3 V.35 To install the ACB-IV using factory default settings, refer to the section on Installation.

  • Page 6: Card Setup

    The ACB 56 contains several jumper straps which must be set for proper operation. Address Selection The ACB 56 occupies 8 consecutive I/O locations. A DIP-switch (SW1) is used to set the base address for these locations. Be careful when selecting the base address as some selections conflict with existing PC ports.
  • Page 7 IRQ Selection (Header E6) The ACB 56 has an interrupt selection jumper which should be set prior to use if an interrupt is required by your application software. Consult the user manual for the application software being used to determine the proper setting.
  • Page 8 DMA Options Headers E1 and E7 select the Direct Memory Access (DMA) mode of operation for the ACB 56. Channel A of the SCC can operate in either half duplex or full duplex DMA mode. Full duplex DMA can transmit and receive data simultaneously.
  • Page 9 (located at Base+4). Removing the jumper disables the drivers, and no DMA can be performed. The power-on reset signal disables the DMA enable signal. A jumper placed in position 7 of E7 will override any software use of the DMA enable/disable status port bit. © Sealevel Systems, Inc. 4021 Manual | SL9154 11/2021...
  • Page 10 Remember that E7 positions 7 and 8 enable or disable DMA operation. Header E5 Header E5 controls the clock input modes for the ACB 56. The input clocks for the SCC can be set in either a non-inverted mode or in an inverted mode for application compatibility.

  • Page 11: Installation

    Hardware Installation The ACB 56 can be installed in any of the PC expansion slots, but to access the ‘AT’ or (E)ISA IRQ’s (10, 11, 12, 15) it must be installed in one of the 16 bit slots. The ACB 56 contains several jumper straps for each port which must be set for proper operation prior to installing the card into the computer.
  • Page 12 Linux releases. Also included is a series of files explaining proper Linux syntax and typical Linux serial implementations. For additional software support, please call Sealevel Systems’ Technical Support, (864) 843-4343. Our technical support is free and available from 8:00AM-5PM Eastern Time, Monday through Friday. For email support contact: support@sealevel.com.

  • Page 13: Technical Description

    Technical Description The ACB 56 utilizes the Zilog 85230 Enhanced Serial Communications Controller (ESCC). This chip features programmable baud rate, data format and interrupt control, as well as DMA control. Refer to the User’s Manual and the Zilog SCC Handbook for details on programming the 85230 ESCC chip.

  • Page 14: Programming The Acb 56

    Control/Status Port The ACB 56 occupies eight Input/Output (I/O) addresses. The first four are used by the SCC chip, while the fifth address (Base+4) is the address of the on-board Control/Status Port. This port is used to set the Data Terminal Ready (DTR) signal, to enable or disable DMA under program control, and to monitor the Data Set Ready (DSR) input signals from the modem.
  • Page 15 Programming The ACB 56, Continued Connector P3 Pin Assignments RS-232 Signals Name Pin # Mode ignal Ground Receive Data Input RS-232 Clear To Send Input RS-232 Data Set Ready Input RS-232 Data Carrier. Detect Output RS-232 Transmit Data Output RS-232...
  • Page 16 Programming The ACB 56, Continued Connector P4 Pin Assignments RS-232 Signals Signal Name Pin # Mode Ground Receive Data Input RS-232 Clear To Send Input RS-232 Data Set Ready Input RS-232 Data Carrier Detect Input RS-232 Ring Indicator Input RS-232...

  • Page 17: Specifications

    Non-Condensing Non-Condensing Manufacturing All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel. Power Consumption Supply line...

  • Page 18: Appendix A - Troubleshooting

    Appendix A – Troubleshooting Sealevel Systems has a ACB Developers Toolkit available at your request. The toolkit can be used in the troubleshooting procedures. Please contact Technical Support as instructed below for more information. The following simple steps below should eliminate most common problems.

  • Page 19: Appendix B - How To Get Assistance

    If possible, please have the adapter installed in a computer ready to run diagnostics. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many common questions. This section can be found at http://www.sealevel.com/faq.asp.

  • Page 20: Appendix C - Electrical Interface

    +10 volts) represents a binary 0 (space) and -12 volts (-3 to -10 volts) denotes a binary 1 (mark). The RS- 232 and the EIA/TIA-574 specification defines two type of interface circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The Sealevel Systems adapter is a DTE interface. V.35 V.35 is a standard defined by ITU (formerly CCITT) that specifies an electrical, mechanical, and physical...
  • Page 21 I/O. In order to provide a means for higher rate data transfers, a special function called Direct Memory Access (DMA) was built into the original IBM PC. The DMA function allows the ACB 56 (or any other DMA compatible interface) to read or write data to or from memory without using the Microprocessor.

  • Page 22: Appendix E - Asynchronous And Synchronous Communications

    The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e., 9600, N,8,1). © Sealevel Systems, Inc. 4021 Manual | SL9154 11/2021...
  • Page 23 (either another sync flag or a bit combination that signals the end of the text, e.g., EOT). The actual sync flag and protocol varies depending on the sync format (SDLC, BISYNC, etc.). © Sealevel Systems, Inc. 4021 Manual | SL9154 11/2021...

  • Page 24: Appendix F - Acb Developer Toolkit And Acb Resource Kit

    ACB family. The ACB Resource Kit provides a brief overview of the ACB product line and is available at your request. For additional information, please contact Sealevel Systems, Inc. Technical Support for assistance: Available Monday – Friday, 8:00AM to 5:00PM EST...

  • Page 25: Appendix G - Silk Screen

    Appendix G – Silk Screen © Sealevel Systems, Inc. 8004 Manual | SL9022 9/2021...

  • Page 26: Appendix H - Compliance Notices

    Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives. © Sealevel Systems, Inc. 8004 Manual | SL9022 9/2021...

  • Page 27: Warranty

    Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is standard on all Sealevel manufactured I/O products. We are able to offer this warranty due to our control of manufacturing quality and the historically high reliability of our products in the field. Sealevel products are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product development, production, burn-in and testing.

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