82374EB Datasheet, PDF (152/208 Pages) Intel Corporation – SYSTEM COMPONENT (ESC)

82374EB 82374SB
Figure 19 Block Diagram of the Interrupt Controller
290476 – 82
Table 23 lists the I O port address map for the interrupt registers
Interrupts
IRQ 7 0
IRQ 7 0
IRQ 7 0
IRQ 15 8
IRQ 15 8
IRQ 15 8
Table 23 I O Address Map
I O Address
of bits
Register
0020h
8
CNTRL-1 Control Register
0021h
8
CNTRL-1 Mask Register
04D0h
8
CNTRL-1 Edge Level Control Register
00A0h
8
CNTRL-2 Control Register
00A1h
8
CNTRL-2 Mask Register
04D1h
8
CNTRL-2 Edge Level Control Register
IRQ0 and IRQ2 are connected to the interrupt controllers internally The other interrupts are always generated
externally IRQ12 and IRQ13 may be generated internally through the ABFULL and FERR signals respec-
tively
152