Re: NULL modem cable.

[CUTblakeney@home.com (Jeff Blakeney)]

On 7 Feb 2000 01:02:17 -0500, kyriann@blackhole.nyu.edu (Jimmy
Kyriannis) wrote:

>For some reason, I seem to recall that the pinout on the Mac serial port is
>different than that of a IIgs, and possibly different vintages of Macs (Mac SE
>vs. Mac G3) behave differently as well.

The difference isn't in the physical pinout or the electrical signals
that are available on each pin.  The difference is how the software
uses each pin.  For example, I don't think the Mac ever has the DCD
(Data Carrier Detect) line from a modem connected to its serial ports
but the IIgs does using the GPI (General Purpose Input) line I
believe.

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