51
Programming with Tasks Section 2-1
Note Unlike earlier programs that can be compared to reading a scroll, tasks can
be compared to reading through a series of individual cards.
• All cards are read in a preset sequence starting from the lowest number.
• All cards are designated as either active or inactive, and cards that are
inactive will be skipped. (Cards are activated or deactivated by task con-
trol instructions.)
• A card that is activated will remain activated and will be read in subse-
quent sequences. A card that is deactivated will remain deactivated and
will be skipped until it is reactivated by another card.
I/O refreshing
Allocation
CP1H
I/O refreshing
Earlier system
One continuous
subprogram
Task 3
Task 2
Task 1
Tasks can be
put into non-
executing
(standby)
status.
Program
development and
debugging is
possible by more
than one person.
To Next Page
Loading...
