Intel 386 - Manual (Page 230)

9-31
INTERRUPT CONTROL UNIT
Figure 9-19. Cascading External 82C59A Interrupt Controllers
A2857-01
READY#
W/R#
D/C#
ADS#
CLKOUT
CLK2
INTA#
and
READY#
State
Machine
INTA#
External
CAS
Decode
CAS0
CAS1
CAS2
External
BLE#
RD#
WR#
D7:0
82C59As
Intel386™ EX
Processor PLD
CAS0
CAS1
CAS2
CS x #
INTA#
CS y #
D7:0
D7:0
A0
RD#
WR#
CS y #
CAS0
CAS1
CAS2
A0
RD#
WR#
CS x # INTA#
Latch
INT
INT y
INT INT x
LBA#
M/IO#
READY#