IAI America PSEL - Manual (Page 139)

129
Part 2 Programs
 EXSR (Execute subroutine)
Command, declaration
Extension condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Optional Optional EXSR
Subroutine
number
Prohibited CP
[Function] Execute the subroutine specified in operand 1.
A maximum of 15 nested subroutine calls are supported.
(Note) This command is valid only for subroutines within the same program.
[Example 1] EXSR 1 Execute subroutine 1.
:
:
EXIT
BGSR 1 Start subroutine 1.
:
:
:
EDSR End subroutine 1.
[Example 2] LET 1 10 Assign 10 to variable 1.
EXSR *1 Execute the content of variable 1 (subroutine 10).
 BGSR (Start subroutine)
Command, declaration
Extension condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Prohibited Prohibited BGSR
Subroutine
number
Prohibited CP
[Function] Declare the start of the subroutine specified in operand 1.
[Example 1] Refer to the section on EXSR command.
(Note) Using a GOTO command to branch out of or into a BGSR-EDSR syntax is prohibited.