Intel 386 - Manual (Page 211)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
9-12
Figure 9-4. Interrupt Process – Slave Request
Slave receives an interrupt request.
Slave sets the request's pending bit.
Is
request
enabled?
Is
special
mask mode
enabled?
(operating in
fully nested mode)
Is
the
in-service
bit for this
request
set?
Is
request
higher
than any set
in-service
bits?
Slave sends request to master.
End
A2428-01
Yes No
No
No
Yes
Yes
Yes
No
Note:
See the "Interrupt Process - Master Request from Slave Source" figure for the continuation of this flow chart.