Re: Dead serial ports?

["A.J." <naijireja@yahoo.com>]

HAPPY DAYS AND JUBILATION!!!!!

After discovering that my null modem adapter was incorrectly wired, and
after trying (TWICE!) to create the proper IIGS high speed modem cable,
I got a solid connection from PC to GS!!

Thank you all for your input.  It has been a frustrating yet rewarding
experience working with these cables.

For others who want to roll their own cables, I have a couple of
discoveries:

1. DB25 male and DB25 female connectors have DIFFERENT pinouts!  The
pin numbers are in the opposite order so that they can mate correctly.

2. When building a null modem adapter, in order to get the pins from
the first DB25 female aligned properly with the pins of the second DB25
female, BE SURE THEY CROSS OVER! If you wired them straight through,
chances are one of the DB25's is using the incorrect inputs.

3. Most PC modem cables are solid and reliable, and have the correct
pinouts.  I can't say the same for most Mac or Apple II cables.  It
seems that most cable manufacturers and custom builders have lost
interest in Apple serial I/O and are building everything to be USB.

Thank you all again,
--A.J.

A.J. wrote:
> Hi all,
>
> How common is it for an Apple IIGS serial port to be dead?  I tried
> hooking up a null cable assembly to a PC, and no matter what settings
I
> tried (and I did ensure that settings lined up correctly betwen PC
and
> GS), I couldn't get the machines to communicate.  I'm using a WinXP
PC
> with HyperTerminal.
>
> For what it's worth, I'm blaming the cable assembly at this point.  I
> purchased the following cables and hooked them up together:
>
> Apple serial adapter, with 8-DIN male and DB-9 female connectors
> gender changer, with DB-9 male connectors, and
> null modem cable, with DB-9 female connectors.
>
> I tried omitting the gender changed and null modem cable and things
> still didn't work.
> Any ideas?
> 
> --naijireja
> 
> To reply to me, reverse my username.