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National Instruments GPIB-COM -c change COM configuration, -q quit

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Section Four Running Diagnostic Tests

© National Instruments Corporation 4-3 GPIB-COM User Manual

When it is finished, the following message appears on the screen:

Plotter test finished.

Please check output to plotter with user manual instructions.

If the plotter does not respond or the output on the plotter does not match Figure 4-1, check again

to be sure that all of the connections are tight and the jumpers are all set correctly. Try the test

again. If it still does not work, write down any error messages that appear and call National

Instruments.

-c change COM configuration

This command is used to change the base address of the GPIB-COM to match the actual board

settings. If you have changed the jumper settings to something different than the default settings,

you must run this command.

When this command is selected, the following menu appears:

This program assumes the GPIB-COM is configured at base address

3F8 (COM1).

Enter the number of the correct address.

1) base address 3F8 (COM1)

2) base address 2F8 (COM2)

Enter 1, 2, or <return> for no change?

Type in the number of the address that you have configured the board to. The computer prints out

your choice and returns to the main menu.

-q quit

This command ends the test program and returns to DOS.

Contents

Main Page Page FCC/DOC Radio Frequency Interference Compliance Preface Introduction to the GPIB-COM Organization of This Manual Related Documents Abbreviations Used in This Manual Contents Page Figures Tables Section One Introduction GPIB-COM Characteristics What Your Kit Should Contain Optional Equipment Page Page Switch and Jumper Settings Base I/O Address and Interrupt Selection Talk/Listen Modes Talk/Listen Address and Special Function Selection Page Installation Special Considerations When Using the GPIB-COM filename Page Function Description Section Three GPIB-COM User Manual 3-2 National Instruments Corporation Figure 3-1 shows a block diagram of the GPIB-COM. GPIB Figure 3-1. Block Diagram of GPIB-COM GPIB-COM Components Page Section Four Running Diagnostic Tests The GPIB-COM Test Commands -1 printer test -2 plotter test -c change COM configuration -q quit Section Five Programming the GPIB-COM The GPIB-COM Registers Transmitter Holding Register Receive Buffer Register Divisor Latch Least Significant Byte (LSB) Register Divisor Latch Most Significant Byte (MSB) Register Interrupt Enable Register Page Interrupt Identification Register Line Control Register Page Modem Control Register Page Line Status Register Page Modem Status Register Page Programming the Serial Adapter Polling Method Interrupt-Driven Method The GPIB-COM Controller Function Appendix A Specifications Page Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Message Definitions Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Appendix C Operation of the GPIB History of the GPIB Types of Messages Talkers, Listeners, and Controllers System Controller and Active Controller GPIB Signals Appendix C Operation of the GPIB National Instruments Corporation C-3 GPIB-COM User Manual Figure C-1 shows the arrangement of these signals on the GPIB cable connector. Data Lines Handshake Lines NRFD (not ready for data) NDAC (not data accepted) Page Page Page Configuration Restrictions User Comment Form