Motorola HC12 User Manual

User’s Manual

MCUez HC12 Assembler

236

Operating Procedures

MOTOROLA

When an .abs file is generated using the assembler (no linker), the application
must be implemented in a single assembly unit and contain only absolute
sections. This is shown in this code example.

Example

:

ABSENTRY entry ; Specifies the application

 ; Entry point

iniStk: EQU $AFE

 ; Initial value for SP

        ORG $FFFE

 ; Reset vector definition

Reset:  DC.W entry

        ORG $40

 ; Define an absolute constant section

var1:   DC.B 5

 ; Assign 5 to the symbol var1

        ORG $80

 ; Define an absolute data section

data:   DS.B 1

 ; Define one byte variable in RAM

 ; address 40

        ORG $B00

 ; Define an absolute code section

entry:

        LDS  #iniStk; Load stack pointer

        LDAA  var1

main:

        INCA

        STAA  data

        BRA   main