Re: ][c null modem problems...

["Paul Grammens" <grammens@svn.net>]

"Chris Morse" <chris@cosmicwolf.com> wrote
>
> Hiya Paul,
>
> I was reading on their site about doing file transfers -- I think
> maybe the quick solution to my problem is getting a copy of an Apple
> IIGS To Printer serial cable, which is supposed to pass off as a null
> modem cable.
>
> Anyhow, here's what I came up with.  This is using the "MultiSpeed
> Modem Cable" from Intrec.com which I got at the same time I purchased
> a copy of ProTERM A2 v3.1.
>
> I used a digital ohm-meter to test all the pin connections.  This is
> how the "Multi-Speed Modem cable" is wired, along with the //c+ serial
> port pin info taken directly from my copy of the Apple IIc Technical
> Reference Manual, 2nd Edition:
>
> Guess I'll make a trip up to CompUSA and try to get that printer
> cable.  Would be nice if I didn't have to frankenstein a cable
> together.
>

Yes, comparing your cable with mine, I think they are a lot alike.  Yours
has a few more connections for hardware handshaking, but as I said, the IIc+
port doesn't do proper hardware handshaking anyway, so they shouldn't make a
difference.

The printer cable you mention should be essentially the same as the pinout I
posted.  The cable you have might work, just start with a low bps rate and
no handshaking or software handshaking.
-Paul