Device Mapping
AlphaStation 500 Series User Information D-3
Table D-2 Main Interrupt Logic IRQ Pin Assignments
Output
IRQ
5
Interrupt
Usage
(Reference Designator)
EV5
IRQ<1>
0
1
2
3
Int A
Int B
Int C
Int D
I/O Riser Slot 2 – 32-bit
J-4
PCI Slot 11
4
5
6
7
Int A
Int B
Int C
Int D
I/O Riser Slot 1 – 32-bit
J3
PCI Slot 12
8
9
10
11
Int A
Int B
Int C
Int D
I/O Riser Slot 0 – 64-bit
J-1
PCI Slot 7
12
SCSI Controller, PCI Slot 9
13
Ethernet Controller, PCI Slot 6
15–14
Reserved
16
17
18
19
Int A
Int B
Int C
Int D
I/O Riser Slot 3 – 32-bit
J-5
PCI Slot 8
23–20
Interrupt Jumpers, See Table D-4.
27-24
•
Module REV
30-28
Reserved
31
EISA_INT
8259 INT output
Note: All unmasked IRQ inputs have equal priority.
5
All unmasked IRQ inputs have equal priority.
