Omron CPM1

322
Subroutine Instructions Section 5-25
the subroutine defined with SBN(92) 000). The following diagram illustrates
two levels of nesting.
The following diagram illustrates program execution flow for various execution
conditions for two SBS(91).
Flags ER: A subroutine does not exist for the specified subroutine number.
A subroutine has called itself.
An active subroutine has been called.
!Caution SBS(91) will not be executed and the subroutine will not be called when ER is
ON.
SBN(92) 010 SBN(92) 011 SBN(92) 012
SBS(91) 011
RET(93)
SBS(91) 010 SBS(91) 012
RET(93) RET(93)
SBS(91) 000
SBS(91) 001
SBN(92) 000
RET(93)
SBN(92) 001
RET(93)
END(01)
Main
program
Subroutines
A
B
C
D
E
A
A
A
A
B
B
B
B
C
C
C
C
D
D
E
E
OFF execution conditions for
subroutines 000 and 001
ON execution condition for
subroutine 000 only
ON execution condition for
subroutine 001 only
ON execution conditions for
subroutines 000 and 001