Justin Skists wrote: >> I had always had the impression that the network port was, in >> fact, the MIDI port. You connect the SAMs up as a daisy chain >> and tell the SAM about it. (Oops, I should write all I know first.)
Gasson wrote: > Kinda-sorta right. It is the MIDI port, but it's not the MIDI > hardware running the thing, AFAIK. Those extra 2 pins on the > MIDI port do the networking. The 2 pins change only the connection property. MIDI is current loop, point-to-point, with receiver not connected to GND. With the network pins the network is like a big OR gate - each computer has one input and the output is common. The UART used for MIDI works also in network. But in multi point network the first byte of frame (computer number) must be send with checking of actual state of line. If you want low state, but the state is high, this means other computer also started transmission and its number is higher, so you must shut up. Such protocol was used in Interface 1. I would like to know is there software that allows connect more than 2 SAMs or connect SAM with Interface 1. > So I suppose it would be possible to wire up a little patch > box to allow both MIDI and networking to be used at once. Only with external switch... > As for the "Network (...) via external MGT interface", I can > only assume it is a misprint. I guess they were not going to > build the networking in originally, and then changed their > minds. What about network channels mentioned elsewhere? -- Yarek.
