Hey Peg,
I think it's not documented because wasn't really for everyone at the start.
Maybe a big customer asked or someon suggested and it became the standard !
If we had heard before, Daniel would have made the TBDML (Turbo BDM Light, cheap programmer for S12) programmed from USB and the PCB would have been even smaller...
Ah "communication"...
Thanks for pinpointing the broken link.
Cheers,
Alban.