Hardware and Software Development Tools for the HCS12 - The HCS12/9S12: An Introduction to Software and Hardware Interfacing - page 127

ldd sum ; compute array average by dividing array count into

ldx #ARCNT ; array sum

idiv ; “

stx average ; save the average

bra $ ; stay here forever

array dc.w 11,12,13,14,15,16,17,18,19,20

dc.w 21,22,23,24,25,26,27,28,29,30

org $FFFE ; set up reset vector

dc.w start

end

Figure 3.25 ■ Select language to be supported under CodeWarrior Wizard

The user can open main.asm by double clicking on it and then selecting the whole contents
and replacing them with the previous program.
There are a few things that the user needs to know about when entering a program to be
run by CodeWarrior.
• The need to set up reset vector. The reset vector is the address of the first
instruction to be executed after the power is turned on or a reset. The reset vector
must be stored at $FFFE. The following instruction sequence sets up the reset
vector accordingly:

org $FFFE

dc.w start ; start is the label of the first instruction of the program