On Wed, 23 Aug 2000, J. van de Griek wrote:
> david ting wrote:
>
> > > Newton used to be important and I guess Apple wanted to be
> > > forward-thinking. The specs are there (as are the basic components).
> > > Several people have made their own audio dongles.
> >
> > Does anyone have the pinout diagram for the MP2K/MP2100 serial port? (I
> > guess this is a dumb question, considering the number of engineers on this
> > list -- surely someone has this information!) What would it take to create
> > an audio dongle?
Newton Interconnect specs are available at Newton Cage:
http://www.chuma.org/newton/ncage/Nstintr.pdf
> The port is RS442 (Mac Serial/LocalTalk) compliant, the secondary port is
> almost compliant, just some trivial electronics needed. RS442 is backwards
> compatible with RS232.
Not to split hairs or anything, but it's RS422 not RS442.
> The Newton Interconnect Port has pins for the following connections:
>
> - Serial 1/LocalTalk
> - Serial 2
Really these are known to the OS as Serial 0 and Serial 3, for reasons only
Apple knows. Serial 3 doesn't have a line driver attached to it, so its
signals are at CMOS level, which basicially means you have to implement some
additional electronics to be able to use it
> - AC In
DC in from the AC adapter.
--
Victor Rehorst - victor@eddie.cis.uoguelph.ca | chuma@chuma.org
Secretary, CASU & CPES College Governments, University of Guelph, Canada
Newton Resources: Ethernet, Mailing List Archive, Newton Cage File Archive,
~~~~~~~~~~~~~~~~ FAQ, Documentation, Books, Projects and fun, too!
http://www.chuma.org/newton/
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