National Instruments GPIB-SCSI-A User manual

Getting Started with
Your GPIB-SCSI-A
and the NI-488.2
™
Software for MacOS
GPIB-SCSI-A for MacOS
July 1997 Edition
Part Number 320468C-01
© Copyright 1992, 1997 National Instruments Corporation. All rights reserved.

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Internet Support
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Fax-on-Demand Support
Telephone Support (U.S.)
International Offices

Important Information
Warranty
The GPIB-SCSI-A is warranted against defects in materials and workmanship for a period of two years from the date
of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace
equipment that proves to be defective during the warranty period. This warranty includes parts and labor.
The media on which you receive National Instruments software are warranted not to fail to execute programming
instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as evidenced
by receipts or other documentation. National Instruments will, at its option, repair or replace software media that do
not execute programming instructions if National Instruments receives notice of such defects during the warranty
period. National Instruments does not warrant that the operation of the software shall be uninterrupted or error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the outside
of the package before any equipment will be accepted for warranty work. National Instruments will pay the shipping
costs of returning to the owner parts which are covered by warranty.
National Instruments believes that the information in this manual is accurate. The document has been carefully
reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments reserves
the right to make changes to subsequent editions of this document without prior notice to holders of this edition. The
reader should consult National Instruments if errors are suspected. In no event shall National Instruments be liable for
any damages arising out of or related to this document or the information contained in it.
EXCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED, AND
SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE.
CUSTOMER’SRIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL
INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER. NATIONAL INSTRUMENTS
WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS, USE OF PRODUCTS, OR INCIDENTAL OR
CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. This limitation of the liability of National
Instruments will apply regardless of the form of action, whether in contract or tort, including negligence. Any action
against National Instruments must be brought within one year after the cause of action accrues. National Instruments
shall not be liable for any delay in performance due to causes beyond its reasonable control. The warranty provided
herein does not cover damages, defects, malfunctions, or service failures caused by owner’s failure to follow the
National Instruments installation, operation, or maintenance instructions; owner’s modification of the product;
owner’s abuse, misuse, or negligent acts; and power failure or surges, fire, flood, accident, actions of third parties, or
other events outside reasonable control.
Copyright
Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical,
including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part,
without the prior written consent of National Instruments Corporation.
Trademarks
LabVIEW®, NI-488®, and NI-488.2™ are trademarks of National Instruments Corporation.
Product and company names listed are trademarks or trade names of their respective companies.
WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS
National Instruments products are not designed with components and testing intended to ensure a level of reliability
suitable for use in treatment and diagnosis of humans. Applications of National Instruments products involving
medical or clinical treatment can create a potential for accidental injury caused by product failure, or by errors on the
part of the user or application designer. Any use or application of National Instruments products for or involving
medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all traditional
medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent serious injury
or death should always continue to be used when National Instruments products are being used. National Instruments
products are NOT intended to be a substitute for any form of established process, procedure, or equipment used to
monitor or safeguard human health and safety in medical or clinical treatment.

FCC/DOC Radio Frequency Interference
Class A Compliance
This equipment generates and uses radio frequency energy and, if not installed and used in strict
accordance with the instructions in this manual, may cause interference to radio and television
reception. Classification requirements are the same for the Federal Communications Commission
(FCC) and the Canadian Department of Communications (DOC). This equipment has been tested and
found to comply with the following two regulatory agencies:
Federal Communications Commission
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant topart 15 ofthe FCC Rules. These limits are designed toprovide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Notices to User: Changes or modifications not expressly approved by National Instruments could void
the user’s authority to operate the equipment under the FCC Rules.
This device complies with the FCC rules only if used with shielded interface cables of
suitable quality and construction. National Instruments used such cables to test this
device and provides them for sale to the user. The use of inferior or nonshielded
interface cables could void the user’s authority to operate the equipment under the
FCC rules.
If necessary, consult National Instruments or an experienced radio/television technician for additional
suggestions. The following booklet prepared by the FCC may also be helpful: Interference to Home
Electronic Entertainment Equipment Handbook. This booklet is available from the U.S. Government
Printing Office, Washington, DC 20402.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel
brouilleur du Canada.

©
National Instruments Corporation v GPIB-SCSI-A for MacOS
Table of
Contents
About This Manual
How to Use This Manual Set........................................................................................ix
Organization of This Manual........................................................................................x
Conventions Used in This Manual................................................................................xi
Related Documentation.................................................................................................xi
Customer Communication............................................................................................xii
Chapter 1
Introduction
What You Need to Get Started .....................................................................................1-1
Optional Equipment......................................................................................................1-1
Hardware Description...................................................................................................1-2
Software Description ....................................................................................................1-2
Optional Programming Tools .......................................................................................1-3
Chapter 2
Installation and Configuration
Connect the Hardware ..................................................................................................2-1
Step 1. Shut Down Your System....................................................................2-2
Step 2. Connect the Cables.............................................................................2-2
Step 3. Switch On Your GPIB-SCSI-A..........................................................2-3
Step 4. Power On Your System......................................................................2-3
Install the Software.......................................................................................................2-3
NI-488.2 Software Components.....................................................................2-3
Step 1. Install the NI-488.2 Files and Folders................................................2-4
Step 2. Examine or Change the Software Settings.........................................2-6
Step 3. Restart Your Macintosh......................................................................2-7
Verify the Software Installation....................................................................................2-7

Table of Contents
GPIB-SCSI-A for MacOS vi
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National Instruments Corporation
Chapter 3
Hardware Configuration
Configuring the Switch Settings................................................................................... 3-1
Configuration Switch Settings for SW1....................................................................... 3-2
Configuration Switch Settings for SW2....................................................................... 3-4
Using SCSI Terminating Resistors 3-6
Appendix A
Hardware Specifications
Appendix B
Troubleshooting
Troubleshooting Hardware Problems B-1
Troubleshooting Software Problems B-2
Common Questions B-2
Appendix C
Customer Communication
Glossary
Figures
Figure 2-1. Installer Window................................................................................... 2-5
Figure 2-2. File and Folder Organization after Installation ..................................... 2-5
Figure 2-3. NI-488 Config Control Panel................................................................ 2-6
Figure 3-1. GPIB-SCSI-A Rear Panel ..................................................................... 3-1
Figure 3-2. SW1 Default Mode Switch Settings...................................................... 3-2
Figure 3-3. SW2 Default Mode Switch Settings...................................................... 3-5
Figure 3-4. Terminating Resistors for GPIB-SCSI-A at End of SCSI Bus ............. 3-6
Figure 3-5. Terminating Resistors for GPIB-SCSI-A Not at End of SCSI Bus ...... 3-7

Table of Contents
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National Instruments Corporation vii GPIB-SCSI-A for MacOS
Tables
Table 3-1. Configuration Parameters for Switches 1 through 3..............................3-2
Table 3-2. Configuration Parameters for Switches 4 through 8..............................3-3
Table 3-3. Factory Default Configurations for SW2...............................................3-5
Table A-1. Electrical Characteristics .......................................................................A-1
Table A-2. Environmental Characteristics...............................................................A-1
Table A-3. Physical Characteristics.........................................................................A-2

©
National Instruments Corporation ix GPIB-SCSI-A for MacOS
About
This
Manual
This manual contains instructions for installing and configuring the
National Instruments GPIB-SCSI-A SCSI-to-GPIB Controller and
NI-488.2 software for MacOS.This manual is meantto be used with the
NI-488.2 User Manual for MacOS and the NI-488.2 Function Reference
Manual for MacOS.
This manual assumes that you are already familiar with the Macintosh
operating system.
How to Use This Manual Set
Use this getting started manual to install and configure your GPIB
hardware and NI-488.2 software.
NI-488.2
User Manual for
MacOS
Application
Development
and Examples
NI-488.2 Function
Reference Manual
for MacOS
Function
and Routine
Descriptions
Novice
Users Experienced
Users
Getting Started
Manual
Installation and
Configuration

About This Manual
GPIB-SCSI-A for MacOS x
©
National Instruments Corporation
Use the NI-488.2 User Manual for MacOS to learn the basics of GPIB
and how to develop an application program. The user manual also
contains debugging information and detailed examples.
Use the NI-488.2 Function Reference Manual for MacOS for specific
NI-488 function and NI-488.2 routine information, such as format,
parameters, and possible errors.
Organization of This
Manual
This manual is organized as follows:
• Chapter 1, Introduction, lists what you need to get started and
optional equipment you can order, and briefly describes the GPIB
hardware and the NI-488.2 software.
• Chapter 2, Installation and Configuration, contains instructions for
connecting your GPIB-SCSI-A, installing the NI-488.2 software,
and testing the software installation.
• Chapter 3, Hardware Configuration, describes how to change the
operating characteristics of the GPIB-SCSI-A and how to use SCSI
terminating resistors.
• Appendix A, Hardware Specifications, specifies the electrical,
environmental, and physical characteristics of the GPIB-SCSI-A.
• Appendix B, Troubleshooting, suggests some areas to check if you
have problems installing the GPIB-SCSI-A or the NI-488.2
software after going through the procedures described in Chapter 2,
Installation and Configuration, and Chapter 3, Hardware
Configuration.
• Appendix C, Customer Communication, contains forms you can
use to request help form National Instruments or to comment on our
products and manuals.
•TheGlossary contains an alphabetical list and description of terms
used in this manual including abbreviations, acronyms, metric
prefixes, mnemonics, and symbols.

About This Manual
©
National Instruments Corporation xi GPIB-SCSI-A for MacOS
Conventions Used in This Manual
The following conventions are used in this manual.
This icon to the left of bold italicized text denotes a note, which alerts
you to important information.
This icon to the left of bold italicized text denotes a caution, which
advises you of precautions to take to avoid injury, data loss, or a
system crash.
This icon to the left of bold italicized text denotes a warning, which
advises you of precautions to take to avoid being electrically shocked.
bold Bold text denotes the names of menus, menu items, parameters, dialog
box, dialog box buttons or options, icons, windows, or LEDs.
bold italic Bold italic text denotes a note, caution, or warning.
italic Italic text denotes emphasis, a cross reference, or an introduction to a
key concept.
monospace Text in this font denotes text or characters that should literally enter
from the keyboard, sections of code, programming examples, and
syntax examples. This font is also used for the proper names of disk
drives, paths, directories, programs, subprograms, subroutines, device
names, functions, operations, variables, filenames and extensions, and
for statements and comments taken from programs.
bold monospace Bold text in this font denotes the messages and responses that the
computer automatically prints to the screen. This font also emphasizes
lines of code that are different from the other examples.
IEEE 488 and IEEE 488 and IEEE 488.2 refer to the ANSI/IEEE Standard
IEEE 488.2 488.1-1987 and the ANSI/IEEE Standard 488.2-1987, respectively,
which define the GPIB.
Macintosh Macintosh refers any computer using MacOS.
The Glossary lists abbreviations, acronyms, metric prefixes,
mnemonics, symbols, and terms.
Related Documentation
The following documents contain information that you may find helpful
as you read this manual:
• ANSI X3.131-1986, Small Computer Systems Interface (SCSI)
!

About This Manual
GPIB-SCSI-A for MacOS xii
©
National Instruments Corporation
• ANSI/IEEE Standard 488.1-1987, IEEE Standard Digital Interface
for Programmable Instrumentation
• ANSI/IEEE Standard 488.2-1987, IEEE Standard Codes, Formats,
Protocols, and Common Commands
Customer Communication
National Instruments wants to receive your comments on our products
and manuals. We are interested in the applications you develop with our
products, and we want to help if you have problems with them. To make
it easy for you to contact us, this manual contains comment and
configuration forms for you to complete. These forms are in
Appendix C, Customer Communication, at the end of this manual.

©
National Instruments Corporation 1-1 GPIB-SCSI-A for MacOS
Chapter
1
Introduction
This chapter lists what you need to get started and optional equipment
you can order, and briefly describes the GPIB hardware and the
NI-488.2 software.
What You Need to Get Started
❑One of the following boxes:
GPIB-SCSI-A, 100 to 120 VAC
GPIB-SCSI-A, 220 to 240 VAC
❑One of the following power cords:
U.S.A. standard power cord
Switzerland power cord
Australian power cord
Universal European power cord
North American power cord
U.K. power cord
❑Standard 50-pin SCSI-1 terminator
❑3.5 in. NI-488.2 Software for MacOS Distribution Disk
Optional Equipment
You can order the following optional equipment from National
Instruments.
• Double-Shielded SCSI Cables:
– Type SCSI-M GPIB-SCSI-A (50-pin Champ) to Macintosh
Powerbook port — 0.5 m
– Type SCSI-A GPIB-SCSI-A (50-pin Champ) to Macintosh
(25-pin D-Sub) — 1 m
– Type SCSI-J GPIB-SCSI-A (50-pin Champ) to SCSI-1
(50-pin Champ) — 1 m

Chapter 1 Introduction
GPIB-SCSI-A for MacOS 1-2
©
National Instruments Corporation
– Type SCSI-G GPIB-SCSI-A (50-pin Champ) to SCSI-2
(50-pin High Density) — 1m
• Shielded GPIB Cables*:
– Type X1 single-shielded cables — 1 m, 2 m, or 4 m
– Type X2 double-shielded cables — 1 m, 2 m, or 4 m
• Rack-Mount Kits:
– Single rack-mount kit (1 unit)
– Dual rack-mount kit (2 units)
• To meet FCC emission limits for this Class A device, you must use
a shielded (Type X1 or X2) GPIB cable. Operating this equipment
with a non-shielded GPIB cable may cause interference to radio
and television reception in commercial areas.
Hardware Description
The GPIB-SCSI-A is a high-performance interface product that
transparently handles data transfers between the SCSI and the GPIB.
It is an 8-bit microcomputer that operates as a full-function
IEEE 488/SCSI Controller. The GPIB-SCSI-A can transform any
computer with a SCSI port into a GPIB Talker/Listener/Controller or
make any device on the SCSI bus look like a GPIB device.
The GPIB-SCSI-A has all the software and logic required to implement
the physical and electrical characteristics of the ANSI/IEEE Standard
488.1-1987 and the ANSI Standard X3T9.2. Also, all GPIB protocols
have been updated to comply with ANSI/IEEE Standard 488.2-1987.
It is able to interpret and execute commands that you send to it over
the GPIB or SCSI ports and perform all necessary SCSI-to-GPIB
protocol conversions.
Software Description
The NI-488.2 software for MacOS is a comprehensive set of programs
and drivers that simplifies the job of programming the GPIB-SCSI-A
to function as a GPIB Controller with complete communication and
bus management capabilities. The NI-488.2 software also comes with
an interactive debugger; FutureBASIC, Macintosh Programmer’s
Workshop (MPW) C, THINK C, and Metrowerks CodeWarrior C
language interfaces; and a shared library for C programmers developing
applications for PowerPC.

Chapter 1 Introduction
©
National Instruments Corporation 1-3 GPIB-SCSI-A for MacOS
Optional Programming Tools
Your kit includes the NI-488.2 software for MacOS. In addition, you
can order the LabVIEW software from National Instruments. LabVIEW
includes instrument driver libraries that make it easier to communicate
with your GPIB instruments.
LabVIEW is a complete programming environment that departs from
the sequential nature of traditional programming languages and features
a graphical programming environment. It includes all the tools needed
for instrument control, data acquisition, analysis, and presentation.
When you order LabVIEW, you also get hundreds of complete
instrument drivers, which are modular, source-code programs that
handle the communication with your instrument so that you do not have
to learn the programming details.
For more information about LabVIEW, contact National Instruments.

©
National Instruments Corporation 2-1 GPIB-SCSI-A for MacOS
Chapter
2
Installation and
Configuration
This chapter contains instructions for connecting your GPIB-SCSI-A,
installing the NI-488.2 software, and testing the software installation.
If you need more detailed information, refer to Chapter 3, Hardware
Configuration.
Connect the Hardware
The following are general instructions for connecting the GPIB-SCSI-A
to your Macintosh. Refer to the manual that came with your computer
for specific instructions and warnings.
You can use two methods to connect the GPIB-SCSI-A to your
Macintosh. One method is connecting the GPIB-SCSI-A directly to the
Macintosh computerbyusing a cable withthe proper connectors ateach
end. The other method is daisy-chaining. Daisy-chaining is a means of
connecting a number of SCSI devices to a host so that a single port on
the host can serve a variable number of devices. If you are installing
the GPIB-SCSI-A in the middle of a daisy-chain, you need to remove
the terminating resistor pack. Refer to the Using SCSI Terminating
Resistors section in Chapter 3, Hardware Configuration, for additional
instructions for daisy-chaining SCSI devices.
There are four basic steps to connecting the GPIB-SCSI-A.
1. Shut down your system.
2. Connect the cables.
3. Switch on your GPIB-SCSI-A.
4. Power on your system.
The GPIB-SCSI-A is shipped from the factory with either a 100 to
120 VAC or 220 to 240 VAC power supply. Before you connect it,
verify that the voltage specified on the rear panel label matches the
voltage that is supplied in your area.

Chapter 2 Installation and Configuration
GPIB-SCSI-A for MacOS 2-2
©
National Instruments Corporation
Caution: Operating the GPIB-SCSI-A at any voltage other than the one specified on
the rear panel label could damage the unit. Replacement fuses must be the
proper type and rating. See Appendix A, Hardware Specifications, for fuse
information.
Step 1. Shut Down Your System
Complete the following steps to shut down your system.
1. Select the Shut Down command from the Special menu.
2. Turn off your computer.
3. Turn off all of the external SCSI devices, if any, attached to your
computer.
4. Unplug the power cord from the power outlet.
Step 2. Connect the Cables
Caution: Never connect or disconnect SCSI cables when any device (computer,
CD-ROM drive, GPIB-SCSI-A, and so on) is powered-on. Doing so can
cause fuses to blow inside the GPIB-SCSI-A and inside other SCSI devices
that supply termination power (TERMPWR) to the SCSI bus.
Complete the following steps to connect the cables.
1. Connect the SCSI cable to the GPIB-SCSI-A and fasten it securely.
Connect the other end to your SCSI system. Be sure to use only
shielded SCSI cables. Total cable length in your SCSI system
should be less than 6 m, and terminating resistors should be
installed on both ends as described in Chapter 3, Hardware
Configuration.
2. Connect the GPIB cable to the GPIB-SCSI-A and tighten the thumb
screws on the connector. Connect the other end to your GPIB
system. Be sure to use only shielded GPIB cables. Total cable
length in your GPIB system should be less than 20 m, with a
maximum separation of 4 m between any two devices. You should
have no more than 15 devices in a GPIB system, and at least
two-thirds of those devices must be powered on.
3. Plug the power cord into an AC outlet of the correct voltage.
!
!

Chapter 2 Installation and Configuration
©
National Instruments Corporation 2-3 GPIB-SCSI-A for MacOS
Step 3. Switch On Your GPIB-SCSI-A
Switch on your GPIB-SCSI-A by using the rocker switch on the rear
panel. The POWER LED indicator should come on immediately and
the READY LED indicator on the front panel should come on after the
GPIB-SCSI-A has passed its power-on self-test, indicating that the unit
is ready for operation.
If the READY LED does not come on within 10 seconds after the unit
is powered on, recheck all connections and switch settings (refer to
Chapter 3, Hardware Configuration) and try the power-on sequence
again. If the READY LED still fails to come on, fill out the forms in
Appendix C, Customer Communication, and contact National
Instruments.
Step 4. Power On Your System
Plug the power cords of the Macintosh computer and any other SCSI
equipment into a power outlet and power on all devices.
Install the Software
The NI-488.2 software is distributed in compressed form on one
diskette. Installing all of the software requires about 1.5 MB of space
on your hard disk and takes about five minutes.
NI-488.2 Software Components
The NI-488.2 software includes the following components:
•NI-488.2 Installer is the software installation program.
•NI-488 INIT is an INIT that loads the device drivers for installed
National Instruments GPIB interfaces when you power on or restart
your Macintosh.
•NI-488 Config is acontrolpanel configuration utility that you can
use to examine or change the software settings.
•NI-DMA/DSP is a system extension that provides DMA
functionality through an RTSI connection to an NB-DMA2800 or
NB-DMA-8.

Chapter 2 Installation and Configuration
GPIB-SCSI-A for MacOS 2-4
©
National Instruments Corporation
•TheC LI and BASIC LI folders contain language interfaces for
Macintosh Programmer's Workshop (MPW) C, THINK C,
Metrowerks CodeWarrior C, and FutureBASIC.
•MacGPIB.shlb is a shared library for C programmers developing
applications for the PowerPC platform.
•IBIC 488.2 is an interactive GPIB control utility.
•NI-488.2 Test is a software diagnostic utility.
•IBDIAG NUBUS, IBDIAG PCI, and IBDIAG PCMCIA are hardware
diagnostic utilities.
•The
Ethernet folder contains utilities that are applicable only if
you have a National Instruments GPIB-ENET.
•The
Read Me file contains the latest updates and corrections to the
manual when appropriate.
Install the NI-488.2 software by completing the following steps.
Step 1. Install the NI-488.2 Files and Folders
Caution: Virus detection software might prevent the installer from copying
important files to the System Folder. You must disable or bypass any
virus prevention software before attempting the installation procedure.
To install the NI-488.2 files and folders, complete the following steps.
1. Insert the NI-488.2 software distribution disk and double-click on
the NI-488.2 Installer icon.
!

Chapter 2 Installation and Configuration
©
National Instruments Corporation 2-5 GPIB-SCSI-A for MacOS
2. Click on the icon on the left side of the Installer window, shown in
Figure 2-1, and drag it to any available disk on the right side of the
window.
Figure 2-1. Installer Window
After installation of all of the software, the NI-488.2 folder should
contain the items shown in Figure 2-2. The installer places the
NI-488 Config file in the Control Panels folder and the
NI-488 INIT and NI-DMA/DSP files in the Extensions folder.
Figure 2-2. File and Folder Organization after Installation

Chapter 2 Installation and Configuration
GPIB-SCSI-A for MacOS 2-6
©
National Instruments Corporation
Step 2. Examine or Change the Software Settings
The default settings for the software work for most applications and
devices. However, you might want to change a device name or primary
address. Also, if more than one GPIB interface or external box is
installed, you might want to associate a device with a particular
interface.
NI-488 Config is a configuration utility that you can use to examine
and change the software settings for your board. You can activate
the configuration utility by selecting Control Panels from the
Apple Icon menu and selecting NI-488 Config.
After the configuration utility is activated, click on the Interface Type
menu and select SCSI box products as shown in Figure 2-3. Checking
the Auto Configure box causes a scan over the SCSI bus to locate any
GPIB-SCSI-A. An Xappears in each SCSI ID box that corresponds to a
GPIB-SCSI-A. If no boxes are checked, you might need to change a
hardware setting. Refer to Chapter 3, Hardware Configuration, for
instructions on changing hardware settings.
Figure 2-3. NI-488 Config Control Panel
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