Intel® Server Board SDS2

I/O Subsystem

Super I/O

Timer

Keyboard

Cascade

Serial Port2/ISA

Serial Port1/ISA

ISA

Floppy/ISA

ISA

RTC

SCI/ISA

ISA

ISA

Mouse/ISA

Coprocessor Error

P_IDE/ISA

S_IDE/ISA

SCSI Ch A

 

 

 

PCIIRQ0

 

 

SCSI Ch B

 

 

 

PCIIRQ1

 

 

NIC 1

 

 

 

 

PCIIRQ2

 

 

 

NIC 2

 

 

 

PCIIRQ3

 

 

Video

 

 

 

PCIIRQ4

 

 

Slot1

INTA

 

PCIIRQ5

Slot2 INTA

 

 

 

PCIIRQ6

 

 

Slot3 INTA

 

 

 

PCIIRQ7

 

 

Slot4 INTA

 

 

 

PCIIRQ8

 

 

Slot5 INTA

 

 

 

PCIIRQ9

 

 

Slot6 INTA

 

 

PCIIRQ10

 

INTBCD

 

 

PCIIRQ11

 

INTBCD

 

 

PCIIRQ12

 

INTBCD

 

 

PCIIRQ13

 

N/C

 

 

PCIIRQ14

 

SCI from SIO

 

 

PCIIRQ15

 

 

 

 

 

 

 

 

Serialized IRQ Interface

PCI IRQ Serializer

SERIRQ

PCI Clock 33 MHz

PIRQ1

PIRQ_LATCH

CSB5 Interrupt Routing

Figure 4. SDS2 Interrupt Routing Diagram

Revision 1.2

23

Order Number:

A85874-002

Page 37
Image 37
Intel SDS2 manual Serialized IRQ Interface PCI IRQ Serializer, CSB5 Interrupt Routing, Super I/O