Parallel poll response pn – Measurement Computing Analyzer488 User Manual
Page 231
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Section 6
Instrument Simulator
6.21
Parallel Poll Response Pn
The Parallel Poll Response command, Pn, is used to set the eight-bit parallel poll
register to any value from 0 to 255. The value in the parallel poll register will be
returned when the IEEE controller issues a parallel poll command (PPOLL) on the bus.
If Pn is used to change the parallel poll register, it replaces any previous register data.
SYNTAX:
P0
Clear the parallel poll register (default)
Pn
Set the Parallel Poll Register to n. (new data
replaces any previous data)
P?
Return Parallel Poll Register contents
EXAMPLES:
PRINT#1,"OUTPUT10;P65X"
set the parallel poll register to 65
PRINT#1,"PPOLL"
parallel poll the bus
INPUT#2,C$
PRINT C$
display shows 65
PRINT#1,"OUTPUT10;P?X"
request parallel poll register
contents
PRINT#1,"ENTER10"
INPUT#2,C$
PRINT C$
display shows P065