IBM 1 Series - Page 34

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* Channel time-out
| CT3
Service
gate
|
>
~~
" mn
Condition code in (interrupt CC) PN
, T3
(
Data
bus
(interrupt
ID)
:
LVS | CTS \ LIS
T2
Service gate return |
CT1 , T4
Data strobe >
CT2
Key:
Timings: CT = channel times.
T = attachment-controlled times.
0<T1<T2
<3
us
LVS.
=
last
valid
signal,
occurring
in
time,
of
a
group
of
signals
0<T3<T4
<3
us
being
activated
on
the
channel.
The
group
is
shown
100
ns
<CT1
linked
by
short,
dotted
lines
on
the
timing
diagram.
200
ns
<
CT2
LIS
=
last
invalid
signal,
occurring
in
time,
of
a
group
of
signals
0<CT5 < 100ns
Figure 2-9.
Interrupt-service sequence timing diagram
being deactivated on the channel. The group is shown
linked by short, dotted lines on the timing diagram.