
Intel
®
SRMK2 Internet Server Technical Product Specification 36
3.15 Fan Support
The backplane powers nine 40mm system fans. Additionally, it incorporates logic to control and
monitor the tachometer speed of fans. Eight of those fans are 40mm x 28mm. The ninth fan is
40mm x 17mm and provides cooling to the PCI add-in card area.
3.16 Baseboard Programming
3.16.1 PCI Configuration Space Map
Table 18: PCI Configuration Space Map
Bus
Number
(hex)
Device
Number
(hex)
Function
Number
(hex)
Description
00 00 00 CNB30LE Host Bridge Function 32 bit PCI (P1_AD[16])
00 00 01 CNB30LE 2
nd
Host Bridge Function 64 Bit PCI (P1_AD[16])
00 01 NA PCI32 VIDEO (P1_AD[17])
00 02 NA PCI32 SLOT1 (P1_AD[18])
00 03 NA PCI32 SLOT2 (P1_AD[19])
00 05 NA PCI32 LAN1 (P1_AD[23])
00 06 NA PCI32 LAN2 (P1_AD[24])
00 0F 00 OSB4 SMB Bus, PCI Configuration Registers (P1_AD[31])
00 0F 01 OSB4 Ultra DMA IDE bus master (P1_AD[31])
01 02 NA PCI64 SLOT1 (P2_AD[18])
01 03 NA PCI 64 SLOT2 (P2_AD[19])
01 04 NA PCI 64 SCSI (P2_AD[20])
3.16.2 Interrupts
Table 19 lists the system interrupts for the SRMK2.
Table 19: PCI Interrupt to OSB4 IRQ Input Mapping
OSB4 Input PCI Interrupt
PCIIRQ0 LAN1 IRQ#
PCIIRQ1 LAN2 IRQ#
PCIIRQ2 P1S1_INTAC# (PCI32 Slot1 Interrupts A & C)
PCIIRQ3 P1S1_INTBD# (PCI32 Slot1 Interrupts B & D)
PCIIRQ4 P1S2_INTAC# (PCI32 Slot2 Interrupts A & C)
PCIIRQ5 P1S2_INTBD# (PCI32 Slot2 Interrupts B & D)
PCIIRQ6 FP_IRQ# (Front Panel IRQ#)
PCIIRQ7 VID_IRQ# (Video IRQ#)
PCIIRQ8 SCSI_IRQA#
PCIIRQ9 SCSI_IRQB#
PCIIRQ10 P2S1_INTAC# (PCI64 Slot1 Interrupts A & C)
PCIIRQ11 P2S1_INTBD# (PCI64 Slot1 Interrupts B & D)
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