How to use subroutines – IAI America XSEL-QX User Manual
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Appendix
14. How to Use Subroutines
Description
When the same processes are performed several times in one program, a group of these steps that are
isolated from others and called together as a set is called a “Subroutine.” Subroutines are used to reduce
program steps and make the program less convoluted. Up to 99 subroutines can be used in one program.
Subroutine calls can be nested by up to 15 times.
How to Use
The following commands are used to declare/call subroutines:
EXSR Call
subroutine
BGSR
Declare start of subroutine (declaration of start a group of steps)
EDSR
Declare end of subroutine (declaration of start of a group of steps)
Example of Use
Note
Using a GOTO command to jump out of a subroutine to TAG outside the subroutine is prohibited.
Subroutine
The same tasks are
consolidated into one location.