Measurement Computing Analyzer488 - Manual (Page 231)

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