Measurement Computing Parallel488 - Manual (Page 29)

Section 4 IEEE to Parallel Operation
4.5
4.4.2 My Listen Address (MLA)
When the Parallel488 is addressed to listen, it accepts data from the active
talker, buffers it and outputs this data through the parallel interface. It will issue
a line feed character upon detection of a carriage return if the Auto Linefeed
feature is enabled.
4.4.3 Device Clear (DCL and SDC)
Device Clear resets the Parallel488's IEEE input buffer and pulses the
parallel interface INIT line. Any pending data is lost.
4.4.4 Interface Clear (IFC)
IFC places the Parallel488 in the Talker/Listener Idle State.
4.4.5 Serial Poll Enable (SPE)
When Serial Poll Enabled, the Parallel488 sets itself to respond to a serial
poll with its serial poll status byte if addressed to talk. The Parallel488 will
continue to try to output its serial poll response until it is 'Serial Poll Disabled' by
the controller.
4.4.6 Serial Poll Disable (SPD)
Disables the Parallel488 from responding to serial polls by the controller.
4.4.7 Unlisten (UNL)
UNL places the Parallel488 in the Listener Idle State.