Intel 386 - Manual (Page 209)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
9-10
NOTE
Unlike the AEOI mode (this is a mode, and not a command like specific EOI
or nonspecific EOI), which is enabled during initialization, the other methods
are commands issued during interrupt processing, usually at the end of an
interrupt’s service routine.
Figure 9-3 illustrates the process that takes place when the master receives a non-slave interrupt
request (which is a request on any IR signal to the master, that does not have a slave cascaded
from it). Figure 9-4 illustrates the process that occurs when a slave receives an interrupt request.
Figure 9-5 continues by showing what happens when the master receives a slave interrupt request
(for example, an IR2 request).