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I also have another (bi-directional) design from a VSPlanet forum user, an engineer called Bear did a redesign of the later revision of the DIF-AT (full bit depth ADAT) though I haven't built one yet (bare PCB)
→Roland RBUS
As this device has no screen, a low level diagnostic routine is inferred from their discovery. Looking closely at the last string or two, I was worried that it might be corrupted as there are some missing letters in the string - (ADAT Sync port di onnected and Dectected rather than Detected).
== Examine Firmware - ==
[[File:DIF AT FLASH SETTINGS.png|thumb|T48 programmer settings and dump - note the very interesting strings!]]
==Roland RBUS==
Here I will refer to the excellent site of Chris Xiong who made a converter from RBUS>ADAT (but not bi-directional) I bought two from him (though I have been too busy with reversing the official one to use them much).
https://chrisoft.org/blog/post/2024-02-02.html (RBUS technical information)
https://chrisoft.org/blog/post/rbus-adat-m.html (Project page)
[[File:DIF AT RBUS CONNECTOR SCHEMATIC.png|alt=RBUS - Connector schematic|thumb|RBUS - Connector schematic]]
From the VS2480 service manual we can see this schematic about the RBUS connector - it is a bi-directional transfer (audio in and audio out) so it crosses over (like a null modem cable)
== Tascam T-DIF ==
I didn't go much into the TDIF as I don't have anything TDIF capable. Both RBUS and TDIF are long obsolete, but ADAT is still going strong. https://www.panix.com/~jens/da-88/tdif.html
A pinout of the connector is shown there. TDIF uses balanced connections, it is a more professional format. Tascam digital dsub connection is now a standard, but it is different to TDIF.
https://en.wikipedia.org/wiki/Tascam_Digital_Interface
Tascam also made a, more professional, converter box: the IF TAD https://www.tascam.eu/en/docs/IF-TAD_manual.pdf
However this is only between TDIF and ADAT.
