JSR and JSRP instructions are placed only at the right end of a row.
A subroutine jump is possible up to 128 times.
One stack is used for one subroutine jump. A total of 128 stacks can be used in the logic program.
Other instructions that use stacks are FOR and NEXT instructions. Each instance of FOR/NEXT instructions use two stacks.
When JSR and JSRP instructions are not conducted, no subroutine processing is performed.