APPENDIX E
IBM PC OR AT (NATIONAL GPIB PC INTERFACE)
The following program sends a command string to the Model 263 from an IBM PC or AT corn-
puter and displays the instrument reading string on the CRT. The computer must be equipped
with the National GPIB PC Interface and the DOS 2.00 (or later revision) operating system. Inter-
face software must be installed and configured as described in the instruction manual.
DIRECTIONS
1. Using the front panel program feature, set the primary address of the Model 263 to 8.
2. With the power off, connect the Model 263 to the IEEE-488 interface installed in the IBM
computer.
3. Type in BASICA on the computer keyboard to get into the IBM interpretive BASIC language.
4. Place the interface software disk in the default drive, type LQAD”DECL’: and press the return key.
5. Add the lies below to lines l-6 which are now in memory. Modify the address in lies 1 and
2, as described in the National instruction manual.
6. Run the program and type in the desired command string. For example, to place the instru-
ment in the current function and 2OOfi range, type in FlR9X and press the return key.
7. The instrument reading string will then appear on the display.
8. To exit the program, type in EMT at the command prompt and press the return key.
PROGRAM
COMMENTS
Clear screen.
Find board descriptor.
Find instrument descriptor.
Set primary address to 8.
Set timeouts.
Set REN true.
Prompt for command.
See if progmm is to be halted.
Check for null input.
Address 263 to listen, send string.
Define reading in
ut buffer.
Address 263 to t
af k, get reading.
Display the string.
Repeat.
Close the instrument file.
Close the board file.
NOTE: For conversion to numeric variable, make the following changes:
E-3
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