Click above to get retro games delivered to your door ever month!

CONDITIONAL NUMERIC SUBROUTINE CALL (S)

Purpose: Makes a decision about branching to a subroutine based on the
         result of a numeric expression.

Format:  Sn1 x n2 .label

Remarks: S         Subroutine call.

         n1        Numeric register or literal number; can also be [n1] to
                   get the length of a string in a file record or a string
                   register.

         x         < or = or >

         n2        Numeric register or literal number.

         .label    Label for program pointer to jump to.

         When the pointer encounters the S Command, the current location is
         automatically stored while the program jumps to the subroutine label.
         The program executes from the subroutine label until it encounters
         a Quit Subroutine Command (Q).  The pointer then returns to the
         step after the Subroutine Call command.

Examples:          If:                 And:                Then:

                   S#1=5678.Label      #1=5678             Jump to Label

                   S#1=#2              #1=678
                                       #2=678              Jump to Label

                   S#1<25.Label        #1=10               Jump to Label

                   S#1>#3.Label        #1=25               Don't
                                       #3=100              Jump to Label

                   S[A(1)]>5.Label     A(1) = 123          Don't
                                                           Jump to Label


         NOTE: The relative value of an alphanumeric character or punctuation
         mark is determined by its hexidecimal value.  Refer to the full
         ASCII chart for the hex value of each ASCII character.