Cyclone III development board and USB FT245BL

Thank you for the link. I'm not familiar to the NIOS community and didn't search there.

I think, it's really good to have a communication channel with documented interface.

I guess, that jtag_atlantic is designed to access JTAG UART instances only, that means, it filters enumerated VJTAG functions for those with an UART type id. It does not provide access to other types. There's no type selection in the DLL interface, thus it's intended for a fixed type only. It's the same with Source & Probe tool, that only enumerates respective instances. A generalized VJTAG access, if using Altera JTAG drivers, has to use the next lower level, jtag_client.dll.

P.S: @svhb. I see, that you mentioned the download application already in March 08. I should have better read the post, when I answered it. Thanks for the suggestion.