TC1796
System Units (Vol. 1 of 2)
Peripheral Control Processor (PCP)
User’s Manual 11-121 V2.0, 2007-07
PCP, V2.0
service request for a channel in any group from 1 to 3, a group 2 channel program can
only be interrupted by a new service request for a channel in group 3).
Note: When using this scheme, each channel program must ensure prior to channel exit
that the R6.CPPN field contains the appropriate value, so that when the channel
is next invoked, it will run at the correct priority.