HP 3336A Operating Manual page 62

Appendix A
To SERIAL POLL the -hp- 3336:
First:
BUS MANAGEMENT LINES
eee listen address
-hp- 3336 talk address
universal Serial Poll Enable (030g)
universal unlisten (077g)
Second:
BUS MANAGEMENT LINES
Third:
BUS MANAGEMENT LINES
— universal Serial Poll Disable
(031g)