Schematics to configure Cyclone GX by Parallel Flash Loader (MAX II+NOR Flash Memory)

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What is the reason for putting PCIe into JTAG chain in Cyclone IV GX Starter Kit and similar schematics?

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If you look at the schematic, you'll see that the PCIe JTAG signals actually connect through a bus switch, so the diagram is incorrect (it shows the MAX II connected to the PCIe).

The implementation could allow a PCIe JTAG master to access the board JTAG chain. However, I've never seen a motherboard that provided JTAG access to PCIe slots, so its rarely used.

Cheers,

Dave