Controlling Program Flow; Using Service Request (Srq) Interrupts - HP 8924C Application Manual

Chapter 10, Controlling Program Flow

Using Service Request (SRQ) Interrupts

Using Service Request (SRQ) Interrupts
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The Test Set provides many status bits which can be read directly or used to
generate SRQ interrupts. For example, the following status indicators have status
bits (in addition to front panel annunciators):
• Transmitting
• Registered
• Page Sent
• Access Probe
• Connected
• Softer Handoff
• Hard Handoff
SRQ interrupts require more program code than requesting status at different time
intervals (polling), but interrupts have the advantage of allowing the Call
Processing Subsystem to operate at its maximum speed since processes within the
subsystem are not constantly interrupted by commands on the HP-IB.
See "Status Register Programming Considerations"
chapter of the HP 8924C User's Guide.
If your computer system or programming language does not support the SRQ
feature of the HP-IB, polling will be required.
in the Status Reporting
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