the interruption. If the block has been unstacked because of an
interruption, the field is zero. If the operation was not started, it
contains the condition code
real
A condition code of 3 is reflected virtual .achine and
to the to the dispatcher. For a condition code of 1, the
field in the
various components of the virtual configuration may
status so indicates. For
channel end and device end, the operation was
The
the same manner, with the additional requirement that the status be
saved in the affected virtual
saved in the
the unit check bit is on in the status field, the sense
retained so that a sense initiated by the virtual machine receives the
proper information.
In any case, when an interruption is received for a virtual device, a
set to 1. The bit that is set is the one corresponding to the relative
address of the interrupting device on the control unit. For
device 235 interrupts, the fifth bit in the
the
bit set corresponds to the address of the interrupting channel. The
next
the operation is to take place and must provide an
the operation.
program to be started in
is to pass control in
should be set to zero
called. If the requester is the
case, an attempt is
device to its control unit and channel. If an
busy or scheduled, the
block of the