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XIO2001: PCI to UART Loop-back fail

Part Number: XIO2001


I have a issue with XIO2001.

< System Configuration >

1) COMe CPU Module(x86) + XIO2001 + two PC104 cards.

- PCI104: Moxa CB-108 PCI to Multi UARTs card

                Adlink PCM-7248+ PCI to Multi DIOs card

- O/S: Windows 10 32bit

2) Issue

 - After installing the Moxa CB-108 device driver successfully, I tried functional test(Loop-back) with proper tool. But there are no functional operation.

   but PCM-7248 is accessed well.

3) Checkpoint

 - Old system used a P/N: IT8892 PCIe to PCI bridge. 

   Combination of  current CPU Module  &  old system is working well.

   So I think this is a problem which is setting from XIO2001.

  This is a difference between XIO2001 and IT8892 under below.

  I don't know why it is different BAR2 size.

Please give me advice