Motorola HC12 User Manual

User’s Manual

MCUez HC12 Assembler

184

Assembler Directives

MOTOROLA

Example:

The following is an example of using conditional assembly
directives:

Try: EQU 0

     IFNE  Try

       LDD #1023

      ELSE

       LDD #0

      ENDIF

The value of

TRY

determines the instruction to be assembled in

the program. As shown, the

LDD #0

instruction generates

code. Changing the directive to

IFEQ

causes the

LDD #1023

instruction to generate code instead.

The following shows the listing provided by the assembler for
these lines of code:

                   Try: EQU  0

                        IFNE Try

                        ELSE

00000 37 B5 00 00         LDD #0

                        ENDIF