Interrupt Process – Slave Request - Intel 386 User Manual

Intel386™ EX EMBEDDED MICROPROCESSOR USER'S MANUAL
request
enabled?
End
Note:
See the "Interrupt Process - Master Request from Slave Source" figure for the continuation of this flow chart.
9-12
Slave receives an interrupt request.
Slave sets the request's pending bit.
Is
Yes
mask mode
enabled?
No
Yes
in-service
bit for this
request
No
Slave sends request to master.
Figure 9-4. Interrupt Process – Slave Request
(operating in
Is
fully nested mode)
special
No
Yes
Is
the
No
set?
Is
request
higher
than any set
in-service
bits?
Yes
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