Outputting Data Over Hp-Ib; Using Interrupts Over Hp-Ib - HP 8921A User Manual

Chapter 16, Radio Interface Screen
Using The Radio Interface (Remote Operation)

Outputting Data over HP-IB

Using Interrupts over HP-IB

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Use one of the following commands to output 1's to the 8 most significant bits on
the parallel data bus.
DISP RINT;RINTerface:PARallel:OUTPut 65280 ;SEND (decimal)
or
DISP RINT;RINTerface:PARallel:OUTPut #HFF00;SEND (hex)
Use the following command to arm Interrupt 1.
DISP RINT;RINTerface:INTerrupt1 'ARM'
Use the following command to disarm Interrupt 1.
DISP RINT;RINTerface:INTerrupt1 'DISARM'
Interrupt 1 and Interrupt 2, when armed, will set bits in the Hardware Status
Register #1 Group. An SRQ interrupt can be generated when either of these
interrupts is tripped, or the Condition register can simply be read to see if a bit was
set. Refer to the Programmer's Guide for details and an example program
showing how to set up an SRQ interrupt.