[snip idea bout mac ports only having DTR pin]

> Ah, okay, I took a look at the Guide to Macintosh Family Hardware (and the
> Apple IIgs Hardware Reference for comparison... turns out they're wired
> the same) and educated myself :) The IIgs reference even calls pin 1 "DTR"
> instead of "HSKo".

Ooo. Even more confirmation. :-)

> > crtscts does not, at present, use HSKo for flow control. It does,
> > however, use CTS for flow control (so we will shut up when asked).
> 
> *nods* I'm still mildly concerned about compatibility though... if some
> code, e.g. kermit, sets CRTSCTS, expecting to get bidirectional flow
> control, won't it potentially be unhappy if it doesn't get it? :)

Usually these settings are in response to the user asking for such flow
control. Since we seem to be able to keep up with one incoming 57600
stream, I think we'll be ok.

> Does crtscts currently do anything at all with HSKo? Does anything at all
> do anything with HSKo? :) Like does it get asserted when the serial port
> is open and negated when closed?

Yes. It's how my computer makes my modem hang up the phone.

Take care,

Bill