I bought this in April 2003 but am yet to make any use of it. I understand that it is required as an anti-copying feature for the BBC Model B running the Level 3 Econet software.

At present I do not have a BBC Model with 1770 disc interface so I cannot test it out.

I presume it is controlled by an OSWORD call but it does not respond to OSWORD 14 & 15.

E-mail me if you can help!