I don't own copies of the standards but, IIRC, the main changes in the spec
have been adding connector/cable types, adding bauds and, changing from a
recommended standard (RS) to an actual EIA/TIA standard.

The standards are available from http://www.eia.org but they may be
expensive.

http://www.maxim.com used to have quite a bit of free information about the
standards as they relate to their chips.

Paul

> -----Original Message-----
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Augusto de Conto
> Sent: Wednesday, December 11, 2002 4:17 PM
> Subject: Re: [EE] RS232 x RS232C
>
>
> Thank all.
> I "discovered" that RS232x (x = {A, B..., F} ) are
> releases of the same protocol. All are +-12V
> ground referenced.
> I'd like to know what is the improvement
> added in RS232C ?
> I am not shure, but it is something like
> * Accept hier baud
> * Another kind of parity
> *...
> I don'k know what is, and this is what I
> would like to know.
>
> Thank
> Augusto de Conto

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