Description
The Intel® Arria® 10 and Intel® Cyclone® 10 GX Avalon®-ST Interface for PCI Express* supports up to 64 tags for non-posted requests internally. To get up to 256 tags you need check the 'Enable Configuration Bypass (CfgBP)' parameter and implement the tag tracking mechanism in user logic.
Resolution
This additional information is scheduled to be added in a future update to the user guide.