ICS Advent DIO24-P User manual

Model DIO24-P
Product Manual
MANUAL NUMBER : 00431-024-14B

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FOREWORD
This product manual provides information to install, operate and or program the referenced product(s)
manufactured or distributed by ICS Advent. The following pages contain information regarding the
warranty and repair policies.
Check our Web site (www.icsadvent.com) for technical information, manuals, and BIOS updates.
Technical assistance is also available at: 800-480-0044 (U.S.) or 858-677-0877 (international).
Customer Comments: If you experience any problems with this manual or just want to provide some
feedback, please send us a message using the online "Service Form" on our Web site (www.icsadvent.com)
under "Support." Detail any errors you find. We will correct the errors or problems as soon as possible and
post the revised manual in our online Support Library. Thank you.
The information in this document is provided for reference only. ICSAdvent does not assume any liability
arising from the application or use of the information or products described herein. This document may
contain or reference information and products protected by copyrights or patents and does not convey any
license under the patent rights of ICS Advent, nor the rights of others.
Copyright © 1995, a California Corporation, 6260 Sequence Drive, San Diego, CA92121-4371. ICSAdvent
is a Registered Trademark of ICS Advent. All trademarks and registered trademarks are the property of
their respective owners. All rights reserved. Printed in the United States of America. No part of this publi-
cation may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, elec-
tronic, mechanical, photocopying, recording , or otherwise, without the prior written permission of the pub-
lisher.

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Shipments not in compliance with this Guarantee
and Limited Warranty Return Policy will not be ac-
cepted by ICS Advent.
Guarantee
A thirty day money-back guarantee is provided on all standard products sold. Special order products are
covered by our Limited Warranty, however they may not be returned for refund or credit. EPROMs,
RAM, Flash EPROMs or other forms of solid electronic media are not returnable for credit - but for
replacement only. Extended Warranty available. Consult factory.
Refunds
In order to receive a refund on a product for the purchase price, the product must not have been
damaged by the customer or by the common carrier chosen by the customer to return the goods and
the product must be returned complete (meaning all manuals, software, cables, etc.) within 30 days of
receipt and in an as-new and resalable condition. The Return Proceduremust be followed to assure
prompt refund.
Restocking Charges
Product returned after 30 days, and before 60 days, of the purchase will be subject to a minimum20%
restocking charge and charges for any damaged or missing parts. Products not returned within 60
days of purchase, or products which are not in an as-new and re-saleable condition, are not eligible
for credit return and will be returned to the customer.
Limited Warranty
Effective April 1, 1998, all products carry a 2-year limited warranty. Within two years of purchase,
ICS Advent will repair or replace, at our option, any defective product. ICS Advent will service the
warranty for all standard catalog products for the first two years from the date of shipment.
Please note: The 2-year warranty may not apply to special promotion items. Please consult the factory for
warranty verification.
The limited warranty is void if the product has been subjected to alteration, neglect, misuse, or abuse; if any
repairs have been attempted by anyone other than ICS Advent or its authorized agent; or if the failure is
caused by accident, acts of God, or other causes beyond the control of ICS Advent or the manufacturer.
Neglect, misuse, and abuse shall include any installation, operation, or maintenance of the product other than
in accordance with the user’s manual.
No agent, dealer, distributor, service company, or other party is authorized to change, modify, or extend the
terms of this Limited Warranty in any manner whatsoever. ICS Advent reserves the right to make changes
or improvements in any product without incurring any obligation to similarly alter products previously
purchased.

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Return Procedure
For any Guarantee or Limited Warranty return, please contact ICS Advent's Customer Service at
800-480-0044 (U.S.) or 858-677-0877 (international) and obtain a Return Material Authorization (RMA)
Number. All product(s) returned to ICS Advent for service or credit must be accompanied by a Return
MaterialAuthorization (RMA) Number. Freight on all returned itemsmust be prepaid by the customer who
is responsible for any loss or damage caused by common carrier in transit. Returns for Warranty must
include a Failure Report for each unit, by serial number(s), as well as a copy of the original invoice showing
date of purchase.
To reduce risk of damage, returns of product must be in an ICS Advent shipping container. If the original
container has been lost or damaged, new shipping containers may be obtained from ICS Advent Customer
Service at a nominal cost.
ICS Advent owns all parts removed from repaired products. ICS Advent uses new and reconditioned parts
made by various manufacturers in performing warranty repairs and building replacement products.
If ICS Advent repairs or replaces a product, its warranty term is not extended.
ICSAdvent will normally return your replacement or repaired items via Second DayAir. Overnight delivery
or delivery via other carriers is available at an additional charge.
Limitation of Liability
In no event shall ICS Advent be liable for any defect in hardware, software, loss, or inadequacy of data of
any kind, or for any direct, indirect, incidental, or consequential damages in connection with or arising out of
the performance or use of any product furnished hereunder. ICSAdvent liability shall in no event exceed the
purchase price of the product purchased hereunder. The foregoing limitation of liability shall be equally
applicable to any service provided by ICSAdvent or its authorized agent.
Some Sales Items and Customized Systems are not subject to the guarantee and limited warranty.
However in these instances , any deviations will be disclosed prior to sales and noted in the original invoice.
ICS Advent reserves the right to refuse returns or credits on software or special order items.

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Advisories
Three types of advisories are used throughout the manual to stress important points or warn of potential
hazards to the user or the system. They are the Note, the Caution, and theWarning. Following is an example
of each type of advisory:
Note: The note is used to present special instruction, or to provide extra information which may
help to simplify the use of the product.
CAUTION!
A Caution is used to alert you to a situation which if ignored may cause injury or
damage equipment.
WARNING!
AWarningisusedtoalertyouofasituationwhichifignoredwillcauseseriousinjury.
Cautions and Warnings are accented with triangular symbols. The exclamation symbol is used in all cautions
and warnings to help alert you to the important instructions. The lightning flash symbol is used on the left
hand side of a caution or a warning if the advisory relates to the presence of voltage which may be of
sufficient magnitude to cause electrical shock.
Use caution when servicing any electrical component. We have tried to identify the areas which may pose
a Caution or Warning condition in this manual; however, ICS Advent does not claim to have covered all
situations which might require the use of a Caution or Warning.
You must refer to the documentation for any component you install into a computer system to ensure proper
precautions and procedures are followed.

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Table of Contents
Chapter 1: Introduction.............................................................................................1-1
Description ........................................................................................................................................ 1-1
Features ............................................................................................................................................ 1-1
Applications....................................................................................................................................... 1-1
Howto remain CECompliant ............................................................................................................. 1-2
Specifications .................................................................................................................................... 1-3
Environmental: ............................................................................................................... 1-3
Inputsand Outputs......................................................................................................... 1-3
Chapter 2: Installation ...............................................................................................2-1
HardwareInstallation.......................................................................................................................... 2-1
Setting BaseAddress ........................................................................................................................ 2-2
Interrupts ........................................................................................................................................... 2-2
Connector PinAssignments........................................................................................................ 2-3
Chapter 3: Programming ..........................................................................................3-1
RegisterAccess ................................................................................................................................ 3-1
ControlRegister ................................................................................................................................. 3-2
8255ModeDefinitionFormat.................................................................................................................... 3-2
ModesofOperation ........................................................................................................................... 3-2
Mode0........................................................................................................................................ 3-2
Mode1........................................................................................................................................ 3-3
Mode2........................................................................................................................................ 3-3
Bit Set/Reset..................................................................................................................................... 3-3
Bit Set/Reset Format ............................................................................................................................... 3-3
Chapter 4: Peek and Poke Driver..............................................................................4-1
UsingtheLibrary ............................................................................................................................... 4-1
Visual Basic Declaration Syntax................................................................................................. 4-3
Installingthe Windows NTPeek andPoke Driver ............................................................................... 4-4
Installingthe Windows 95Peek and PokeDriver................................................................................ 4-5
DeletingAdditionalCopies ofthe Windows95 Peek andPoke Driver ......................................... 4-5
PeekandPokeDriverTroubleshooting ............................................................................................... 4-6
Appendix A: 8255 Data Sheet .................................................................................. A-1
Appendix B: Pinout Drawing................................................................................... A-1

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CE Declaration of Conformity
List of Figures
Figure1: DIO24-PBlock Diagram ........................................................................................................... 1-2
Figure2: DIO24Layout ........................................................................................................................... 2-3
List of Tables
Table 4-1: Peek and Poke Library Functions ........................................................................................... 4-2
Current Revision 14B
December 2000

Chapter 1: Introduction
Manual Number: 00431-024-14 Page 1-1
Chapter 1: Introduction
Description
The DIO24-P parallel digital I/O card provides 24 TTL/DTL compatible digital I/O lines, interrupt
input and enable lines and external connections to the IBM PC bus power supplies. It is a flexible
interface for parallel input/output devices such as instruments and displays and user contructed
systems and equipment.
24 digital I/O lines are provided through an 8255-5 programmable peripheral interface (PPI) IC.
These 24 lines are divided into three 8-bit ports, PA, PB, and PC. The PC port may also be further
divided into two 4-bit ports PC-Upper and PC-Lower. Each of the ports may be configured as an
input or an output by software control according to the contents of a write only register in the 8255.
Each port may be read as well as written to. In addition, the 8255 has other modes of operation that
allow unidirectional and bidirectional strobed I/O where the PC ports are used for control of data
transfer and interrupt generation, etc. Refer to the 8255 data sheet located at the back of this manual
for a complete technical description and summary of the various operating modes of the 8255.
Interrupt handling is via a tristate driver with separate enable (interrupt enable - active low). This
may be connected to any of the interrupt levels 2-7 available on the IBM PC bus by means of a plug
type jumper on the board. Handling of an interrupt is controlled by the 8259 interrupt controller on
the PC and this is set by the BIOS on system initialization to respond to their requirements and set up
corresponding interrupt handlers.
Power from the computer bus is available on the connector. Users should observe the current capac-
ity limits of the bus. 1A fuses are provided on all power outputs.
The board format is half-size and will fit in any full or half-length slot in a PC/XT/AT or compatible
computer running at any clock speed. Various termination boards are available such as the Indus-
trial Computer Source Model UTB-K.
Features
 24 Channels of Digital Input/Output
 Four and Eight Bit Ports Independently Selectable for I/O
 Unidirectional/Bidirectional Strobed I/O
 Hysteresis on I/O Lines
 Interrupt Handling
Applications
 Security Systems, Energy Management
 Relay Monitoring and Control
 Parallel Data Transfer to PC
 Sensing Switches or Signals, or TTL, DTL, CMOS Logic
 Driving Indicator Lights or Recorders