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62 Board Manual
Intel® IQ80219 General Purpose PCI Processor Evaluation Platform
Hardware Reference Section
3.10.9.10 Switch S8E1- 7
Used to enable the IDSEL reroute function at reset or power-up. The reset value of the secondary bus
private device mask register is modified according to the tie value of the IDSEL_REROUTE_EN pin.
0 = on: reset value of the secondary bus private device mask register is x’00000000’.
1 = off: reset value of the secondary bus private device mask register is x’22F20000’.
3.10.9.11 Switch S8E1- 8
Used to enable the opaque memory region at reset or power-up. The reset value of bit 0 of the
opaque memory enable register is modified according to the tie value of the OPAQUE_EN pin.
0 = on: reset value of bit 0 of the opaque memory enable register is b’0’.
1 = off: reset value of bit 0 of the opaque memory enable register is b’1’.
This register enables the opaque memory base, opaque memory limit, opaque memory base upper
32 bits, and the opaque memory limit upper 32 bits registers. These registers specify a range of 64-bit
memory addresses that are used exclusively on the secondary PCI bus and are not to be accepted by
the bridge on either the primary or secondary interfaces.
Table 58. Switch S8E1 - 7: Descriptions
Switch Association Description Factory Default
S8E1-7 PCI-X Bridge
IDSEL_REROUTE_EN: Sets the value of SPCI-X
private device mask.
Off
Table 59. Switch S8E1 - 7: Settings and Operation Mode
S8E1-7 Operation Mode
Off PCI-X Bridge hides the devices that using private space address lines.
On PCI-X Bridge does not hide any devices.
Table 60. Switch S8E1 - 8: Descriptions
Switch Association Description Factory Default
S8E1-8 PCI-X Bridge OPAQUE-EN: controls OPAQUE memory register. Off
Table 61. Switch S8E1 - 8: Settings and Operation Mode
S8E1-1 Operation Mode
Off Enables opaque.
On No opaque.