Stored control programme changing system - operates by insertion of jump command leading to changed programme parts

摘要

The jump command is formed by subsequently changing individual elements of the command to be amended into the possible direction. In the command to be amended only elements of the operational part are subsequently changed in the possible direction, while the address part is taken over unchanged as the address part of the jump command so formed. The programme store PROM can have two storage places, the first identified by a marking and the other also identified by a marking. The unchanged address of the jump command obtaining by changing the elements can form the indirect address for the changed programme part.