Motorola HC12 - Manual (Page 229)

Operating Procedures
Initializing the Vector Table
MCUez HC12 Assembler User’s Manual
MOTOROLA Operating Procedures 229
Example:
XDEF ResetFunc
DataSec: SECTION
Data: DS.W 5 ; Each interrupt increments an element of the table
CodeSec: SECTION
; Implementation of the interrupt functions
IRQFunc:
LDAB #0
BRA int
XIRQFunc:
LDAB #2
BRA int
SWIFunc:
LDAB #4
BRA int
OpCodeFunc:
LDAB #6
BRA int
ResetFunc:
LDAB #8
BRA entry
DummyFunc:
RTI
int:
LDX #Data
ABX
INC 0, X
RTI
entry:
LDS #$AFE
loop: BRA loop
ORG $FFF2
; Definition of the vector table in an absolute section
; starting at address $FFF2
IRQInt: DC.W IRQFunc
XIRQInt: DC.W XIRQFunc
SWIInt: DC.W SWIFunc
OpCodeInt: DC.W OpCodeFunc
COPResetInt: DC.W DummyFunc; No function attached
; to COP Reset
ClMonResInt: DC.W DummyFunc; No function attached to Clock
; MonitorReset
ResetInt : DC.W ResetFunc