IBM Series 1 User Manual page 49

I\.)
,
w
~
~
b:-
Cycle steal request in or
Request in bus
W
Poll identifier
.&::'
I
o
o
~ ~Po~l~l
______________________________________
~
W
Poll return
Service gate
Service gate return ) )
t
Cr-------------~
Timings:
T1
<
100 ns
T2
<
T3
<
100 ns
T4
<
100 ns
T5
>
0
CT1 > 180 ns
CT2 >0
CT3 >0
CT4 :; 100 ns
+
T4
CT5
>
0
rJ
Legend:
CT
=
channel times
T
=
attachment controlled times
LVS = last valid signal, occurring in time, of a group of
signals being activated on the channel. The group
is linked by short dotted lines on the timing diagram.
LIS last invalid signal, occurring in time, of a group of
signals being deactivated on the channel. The group
is linked by short dotted lines on the timing diagram.
iI-" '",
...
T5
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CD
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