METHOD OF CONTROLLING JUMPS TO DIFFERENT PROGRAMS IN A COMPUTER WORKING IN REAL TIME

摘要

The invention refers to a method of controlling jumps to different programs in a computer which works in real time. A number of programs associated with different priority levels are performed sequentially within subsequent primary intervals determined by a clock register. The programs associated with the different priority levels have to be addressed in periodically recurrent intervals of different length. After having performed a program a sum value is formed by addition of the contents of the clock register and a number corresponding to the number of subsequent primary intervals within which the addressing of the program has to be omitted. Within each primary interval the actual value of the clock register in priority order is compared with the sum values associated with the respective programs. If the value of the clock register upon comparison is found to have passed a sum value that one of the programs is addressed with which said sum value is associated.