(1) Please use the CALL instruction, that is, the FUN67 instruction, to enter the subroutine, and use the label in the subroutine: the LBL instruction is FUN65, and after the subroutine segment, please use the RTS instruction, that is, the FUN68 subroutine return instruction.
(2) Use the interrupt mode. As long as the corresponding interrupt name is added, "I" is added as the interrupt subroutine label. For example, if the X rising edge interrupt input is used, the X rising edge interrupt number is "; X1 +, then the corresponding The interrupt label is: X1I, so use the FUN65: LBL instruction in the subroutine to specify: LBL X1I From this label, the X1 input interrupt subroutine is entered. At the end of the interrupt subroutine, use FUN69: RTI to return to the end to indicate the end.