4 May
2004
4 May
'04
6:02 p.m.
Does anyone know, or know of a reference to, the serial-line protocol
spoken by Summagraphics tablet digitizers (specifically, the MM1103)?
[..]
This makes it all at least somewhat usable. But
I'd really like to be
able to get samples back even when no buttons are pressed, whence my
question.
The back does include a sticker saying, among other things, "BIT PAD
FORMAT", which may or may not mean anything useful. I did go
The Sumagraphics Bit Pad 1 was a very common tablet at one time. From
waht I remember, and I do have the manual _somewhere_ (this being a real
manual which documents the data format and includes schematics), there
were 2 output formats. One was ASCII, sending the position in decimal
(that;s what you've got), the other was binary. Which you got was set by
a DIP switch inside.
Another switch turned on streaming mode (I think that's what they called
it) which caused the thing to send out coordinates all the time, even
without a puck button being pressed. I think that's the mode you're
asking for,
I would guess you need to find the right DIP switches inside, which are
doubtless different to those on the Bit Pad 1
-tony