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MOTOROLA M68040 USER’S MANUAL 8- 3
EXIT
FETCH VECTOR 
NUMBER
(DOUBLE BUS FAULT)
EXECUTE EXCEPTION
HANDLER
EXIT
(DOUBLE BUS FAULT)
(DOUBLE BUS FAULT)
ENTRY
SAVE CONTENTS
TO STACK FRAME
(SEE NOTE)
PREFETCH 4
LONG WORDS
OTHERWISE
BEGIN INSTRUCTION 
EXECUTION
OTHERWISE
BUS ERROR
BUS ERROR
BUS ERROR OR
ADDRESS ERROR
HALTED STATE
(PST3–PST0 = $5)
OTHERWISE
SAVE INTERNAL 
COPY OF SR
S 1
T1, T0 0
(SEE NOTE)
NOTE: These blocks vary for reset and interrupt exceptions.
Figure 8-1. General Exception Processing Flowchart
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