Re: nullmodem communication

[BluPhoenyx <bluphoenyx-@-earthlink.net>]

Knut Roll-Lund wrote:
> I'm attempting to transfer files from a pc to an Apple //e enhanced with 
> a super serial card but have problems.
>
> My setup works wonderfully with ADT and also IN#2 and even PR#2. The SSC 
> card is set up to ignore the modem signals. My cable is not a full 
> cable, it has only rx, tx and ground.

My 2c cable is this way on the Apple end.

> I have downloaded several communications packages for prodos that I have 
> tried. They all have the same problem, they refuse to receive but send 
> ok. I'm suspecting it is because they enable the modemsignals and fails 
> because of that. I have tried a normal loopback cable but this does not 
> work either.
>
> I wonder if there is any applications that would be able to receive a 
> file (zmodem/ymodem or even xmodem) for prodos which doesn't hang 
> itselves on such details (is made for nullmodem).

I use Proterm 2. You can turn off the hand-shaking in it. Sometimes 
there are errors in transmission but Proterm still downloads the files ok.

> Is it maybe something I do wrong or it is just that I need to supply 
> modemsignals, a better cable...

Just ensure the port settings, including hand-shaking, are matched on 
both ports.

Proterm also has a null modem setting. It's still for sale on the web 
for $20 according to the order sheet.

Cheers,
Mike T.