Appendix A
To cause simultaneous action in all devices capable of responding:
BUS MANAGEMENT LINES
ATN
IFC
SRQ
REN
EOI
oar
sent on Data lines
T
F
x
T
x
BS
—_
universal Group Execute Trigger
(101g)
To cause simultaneous action in selected devices:
First:
BUS MANAGEMENT LINES
ATN
IFC
SRQ
REN
EOI
cease
et
on Data lines
T
F
xX
TT
X
?
U
+
6
L device #2 listen address
device #1 listen address
controller talk address
universal unlisten (077g)
Second:
BUS MANAGEMENT LINES
ATN
'IFC
SRQ
REN
EO!
———
sent on Data lines
BS
F
F
Xx
T
x
|
universal Group Execute Trigger
(0108)
Figure 3-A-9. Trigger.
To send the REQUIRE SERVICE message:
BUS MANAGEMENT LINES
ATN
IFC
SRQ
REN
EOI
Xx
Xx
T
X
Xx