IBM Series 1 User Manual page 50

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Poll identifier
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Burst return
Service sequences
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Last transfer service gate return
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Timings:
T1
<
100 ns
T2
<
T3
<
100 ns
T4> 100 ns
TS
>
0
CT1 > 180
os
CT2 > 0
CT3 > 0
CT4> 100 ns
CT5
>
0
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.
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