Nvidia MCP55 Porting Notes

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Interrupt Routing Registers

Values for routing IRQ's:

Value APIC Pin (hex.) APIC Pin (dec.)
0x01 0x17 23
0x02 0x16 22
0x03 0x10 16
0x04 0x11 17
0x05 0x05 5
0x06 0x12 18
0x07 0x7 7
0x08 0x14 20
0x09 0x09 9
0x0A 0x0a 10
0x0B 0x0b 11
0x0C 0x13 19
0x0D 0x15 21
0x0E 0x0E 14
0x0F 0x0F 15

Register

Each line is 4 bits.

0x7c 0x80 0x84
INTA SCII INTG
INTB TCOI INTH
INTC INTF INTJ
INTD INTQ INTK
PCEA INTU INTL
PCEB INTS INTM
PCEC IS0P INTN
PCED ITID ISA2

Wiring on M57SLI-S4

Device/Pin Routed to Pin Description
1/INTA INTF ISALPC
1/INTB INTS SMBus
2/INTA INTG Usb0
2/INTB INTQ Usb1
4/INTA INTN IDE
5/INTA ITID Sata1
5/INTB IS0P Sata2
5/INTC ISA2 Sata3
6/INTA INTU Bridge to Bus 1
6/INTB INTK Audio
8/INTA INTJ Ethernet

Bridges to the PCI-E Slots & Devices

Device/Pin Routed to Pin Description
F/INTA PCEB Bridge to Bus 7 - PCIE 16x (black)
F/INTB PCEC
F/INTC PCED
F/INTD PCEA
E/INTA PCEC Bridge to Bus 6
E/INTB PCED
E/INTC PCEA
E/INTD PCEB
D/INTA PCED Bridge to Bus 5
D/INTB PCEA
D/INTC PCEB
D/INTD PCEC
C/INTA PCEA Bridge to Bus 4
C/INTB PCEB
C/INTC PCEC
C/INTD PCED
B/INTA PCEB Bridge to Bus 3
B/INTB PCEC
B/INTC PCED
B/INTD PCEA
A/INTA PCEC Bridge to Bus 2 - PCIE 16x (blue)
A/INTB PCED
A/INTC PCEA
A/INTD PCEB

Bus 1 behind bridge from device 6

Device/Pin Routed to Pin Description
6/INTA INTC
6/INTB INTD
6/INTC INTA
6/INTD INTB
7/INTA INTD PCI Slot 1
7/INTB INTA
7/INTC INTB
7/INTD INTC
8/INTA INTA PCI Slot 2
8/INTB INTB
8/INTC INTC
8/INTD INTD
9/INTA INTB
9/INTB INTC
9/INTC INTD
9/INTD INTA
A/INTA INTC
A/INTB INTD
A/INTC INTA
A/INTD INTB