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Level 7 interrupt?
Mask level 6
or below?
Figure 5-6 Flowchart of Procedure Up to Interrupt Acceptance in
120
Program execution status
Interrupt generated?
Yes
No
Yes
Level 6 interrupt?
No
Yes
Mask level 5
or below?
Save PC, CCR, and EXR
Clear T bit to 0
Update mask level
Read vector address
Branch to interrupt handling routine
Interrupt Control Mode 2
No
Yes
NMI
No
No
Yes
Level 1 interrupt?
No
Yes
No
Yes
No
Mask level 0?
Yes
Hold pending
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