HP 3336A Operating Manual page 64

Appendix A
To PASS CONTROL of the HP-IB from one controller to another:
First:
BUS MANAGEMENT LINES
ATN IFC SRQ REN EOI
see sequence Data lines
T F x T x ? U 9
a address of controller to
receive bus control
talk address of controller giving
up bus control
universal unlisten (077)
Second:
BUS MANAGEMENT LINES
F F x T xX |
universal Take Control (01138)
Figure 3-A-11. Pass Control.
To halt all activity and return bus control to the system controller.
BUS MANAGEMENT LINES
ATN IFC SRQ REN EOI
X T Xx Xx x
Only the system controller has this capability.
Figure 3-A-12. Abort 1/0.
A-8