Multitech ISI552PC User manual

Intelligent Serial Interface (ISI)
Model ISI552PC Card
Owner's Manual
MultiTech

Systems

Owner's Manual
P/N 82033101, Rev. B
ISI552PC
This publication may not be reproduced, in whole or in part, without
prior expressed written permission from Multi-Tech Systems, Inc.. All
rights reserved.
opyright © 1994, by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc., makes no representation or warranties with
respect to the contents hereof and specifically disclaims any implied
warranties of merchantability or fitness for any particular purpose.
Furthermore, Multi-Tech Systems, Inc., reserves the right to revise
this publication and to make changes from time to time in the content
hereof without obligation of Multi-Tech Systems, Inc., to notify any
person or organization of such revisions or changes.
Record of Revision
Revision Description
B Manual revised wi h minor echnical, edi orial
(12/25/94) and forma changes.
TRADEMARKS
Multi - Tech, MultiExpress, MultiModemII and the Multi - Tech logo:
Multi - Tech Systems, Inc.
i386, i486: Intel orporation
P -DOS: International Business Machines orporation
Mul i-Tech Sys ems, Inc.
2205 Woodale Drive
Mounds View, Minneso a 55112 U.S.A.
[phone] or [phone]
U. S. FAX [phone]
Technical Suppor [phone]
BBS [phone] or [phone]
In erne Address: h p://www.mul i ech.com
Technical Wri er: mark@mul i ech.com

i
TABLE OF CONTENTS
CHAPTER 1
INTRODUCTION & DESCRIPTION
1.1 Introduction ........................................... 1-1
1.2 Product Description .............................. 1-2
1.3 How to Use This Manual ...................... 1-2
1.4 Technical Specifications ...................... 1-3
CHAPTER 2
HARDWARE INSTALLATION
2.1 ISI ard Installation .............................. 2-1
2.2 Determining urrent System Settings . 2-1
2.3 Hardware Installation Procedure .......... 2-3
CHAPTER 3
SERVICE, WARRANTY, AND TECHNICAL
SUPPORT
3.1 Introduction ........................................... 3-1
3.2 Limited Warranty .................................. 3-1
3.3 Tech Support ........................................ 3-2
3.3.1 Recording ISI552P Information 3-3
3.3.2 Service ........................................ 3-4
3.4 About the Multi-Tech BBS .................... 3-5
3.4.1 How to Use the Multi-Tech BBS . 3-5
3.5 About ompuServe/Internet ................ 3-6
3.6 About Multi-Tech's Fax-Back Service .. 3-7
3.7 Safety Warnings ................................... 3-8
Appendix A:
I/O Address Switch Settings A-1
INDEX

1-1
1 . 1 Introduction
The introduction of high speed, data compression
modems, such as Multi-Tech's MultiModemII TM
Series, has shown that many PC serial ports are
unable to keep up, essentially becoming a bottleneck
for the entire system. The S 552PC card is a dual
port serial expansion card and provides processing
power to reliably transmit data up to 115.2K bps per
port. Each port can be independently configured for
asynchronous full duplex communications. Using
an S enables your system's processor to perform
more efficiently. This is because the S handles all
of the byte-by-byte interrupts generated by the
asynchronous terminals and stores the data in
buffers. The S then generates one interrupt for an
entire block of information and transfers the block to
the system's microprocessor.
This manual provides the hardware installation
procedures for the S 552PC card. The operation of
the card provides the basis for its name S (Intelligent
Serial Interface), 552 indicating the processing power
of a 16550A UART and dual port support, and PC
indicating that it is an ISA bus card (8 bit), which is
able to operate in any 286, 386, or 486 SA or E SA
compatible bus personal computer. The S 552PC
serial ports can be accessed by any software written
to the 16550A specification.

1-2
This manual contains product specification,
installation instructions, configuration and technical
support information which will assist you in the
operation process. t is assumed that you have basic
PC skills at the very least. Therefore, we have not
included step-by-step instructions for basic
operations such as logging in and file editing, etc.
1 . 2 Product Description
The S 552PC card is a dual-port serial expansion
card which adds data buffering for enhanced serial
port performance. The S 552PC features two 9 - pin
connectors ( DB-9s), and is a "half-size" expansion
card that supports a high-speed interface (up to
115.2K bps per port via 32K bytes of RAM). The
S 552PC features two banks of 8 D P-Switches for
/O address selection and two jumper blocks for RQ
level selection.
1.3 How to Use This Manual
This chapter begins with a short introduction, product
description, followed by a guide (which you are now
reading) to the use of this manual, as well as the
S 552PCs technical specifications.

1-3
This manual includes hardware configuration and
installation procedures described in Chapter 2. Chapter
3 covers technical support, warranty and BBS
information. Appendix A describes complete
information on Base /O addressing.
1 .4 Technical Specifications
Computer Requirements
· 286-, 386- or 486- based PC or compatible
Operating Temperature
· 0° to 50°C (32° to 120°F)
Serial Interface
· RS232C, RS232D
Bus Type
· BM PC standard ( SA bus) or E SA
Power Consumption
· 750 mAmps @ +5 VDC
· 100 mAmps @ +12 VDC
· 100 mAmps @ -12 VDC

1-4
Card Dimensions
ISI552PC
· 4.950" L x 4.2" W x .062" D
· 12.573 cm L x 10.668 cm W x .16 cm D
Baud Rates
· Up to 115.2K bps per port (two)
Connector Types
· Two DB-9s on S 552PC
I O Address
· Set by hardware D P-Switch, valid range 100H to
3F8H (See Appendix A)
Interrupt Request
· Set by hardware Jumper, valid RQs -- 2, 3, 4, 5,
7, 10, 11, 12, & 15

2 - 1
2.1 ISI Card Installation
This chapter explains procedures for installing your
ISI552P card into your ISA or EISA bus personal
computer (P /XT/AT/PS/2 Models 25 and 30 or
equivalents).
Hardware installation involves:
1) Opening your P .
2) Setting card configuration (determining
I/O address DIP-Switch setting and IRQ
jumper setting).
3) Installing the card into the P .
2.2 Determining Current System
Settings
When you install a serial device into your computer,
the processor must have a means of routing
information to and from the device and the device
must have a means of gaining the processor's
attention. These are called Input/Output (I/O)
addresses and Interrupt Requests (IRQs),
respectively. The ISI552P card requires eight I/O
addresses and one IRQ value which are not used by
any other device in your system. When selecting a
unique base I/O address, be sure that the other

2 - 2
addresses are also unused. (For example, if you
use the base I/O address of 380h, addresses 380h-
387h must be unused.)
To select an unused I/O address and an IRQ value,
it may be necessary to find out which values are
already in use. To determine your system's current
settings, refer to Appendix A. ISI552P port #1 is
shipped with the IRQ set to level 3 and the base I/O
address at 2F8 hex; and ISI552P port #2 is shipped
with the IRQ set to level 4 and the base I/O address
at 3E8. If you are certain that these settings are not
already in use, continue with the hardware
configuration and installation.
Note: If yo choose IRQ 3 or 4, yo may have to
remove the serial I/O device from yo r
config ration files. The ISI552PC cards do not
allow yo to select IRQ 6 beca se it is almost
niversally sed for the floppy drive of a
comp ter. Also, most comp ters will not be able
to assign IRQ 2 to the ISI beca se IRQ 2 is sed
for slave control.

2 - 3
2.3 Hardware Installation Procedure
Perform the procedures in Table 2-1 to configure
and install the ISI552P card into your ISA or EISA
bus host computer.
1 Make sure your computer and
any peripheral equipment
connected to it, are turned off.
Failure to do so may damage
both your ISI card and your P .
The card may be installed in any
286-, 386- or 486-based
computer with an ISA or EISA
bus architecture.
Table 2-1
Step Proced re
ISI Config ration and Installation Proced re
Fig re 2-1. I/O Address Switch/IRQ J mpers
Port #1 Port #2