Measurement Computing Parallel488 - Manual (Page 41)

Section 5 IEEE 488 Primer
5.9
5.7.8 Selected Device Clear (SDC)
This causes a single device to be initialized to a pre-defined or power up state. ($04)
5.7.9 Serial Poll Disable (SPD)
The SPD command disables all devices from sending their Serial Poll status byte. ($19)
5.7.10 Serial Poll Enable (SPE)
A device which is Addressed to Talk will output its Serial Poll status byte after SPE is sent and
ATN is unasserted. ($18)
5.7.11 Group Execute Trigger (GET)
This command usually signals a group of devices to begin executing a triggered action. This
allows actions of different devices to begin simultaneously. ($08)
5.7.12 Take Control (TCT)
This command passes bus control responsibilities from the current Controller to another device
which has the ability to control. ($09)
5.7.13 Secondary Command Group (SCG)
These are any one of the 32 possible commands (0 to 31) in this group. They must
immediately follow a talk or listen address. ($60 to $7F)