Re: Null modem problems

[pubpc1@library.ucla.edu]

Toby Reiter <str4552@OBERLIN.EDU> wrote:
>On 11 Dec 1996 pubpc1@library.ucla.edu wrote:
>
>> elric@neo.lrun.com (Robert H) wrote:
>> >
>> >>
>> >>Just to add to what Sam said, for the IIc+, a null modem cable is synonymous
>> >>with a "Macintosh to ImageWriter II" cable (they function the same way).
>> >>
>> >>Just go to the local computer store and get a Mac->IWII serial cable, plug
>> >>one end into the IIc+ and the other into the PC's serial card port, and then
>> >>send from the IIc+ to the PC.
>> >
>> >Is that the same cable that will also hook up to an older //c
>> >computer's serial port?  If so, then all I would need to transfer
>> >files from a //c to a PC is the above mentioned cable and a null modem
>> >adapter, correct?
>> >
>> >Robert
>> 
>> Not exactly.  The above mentioned cable IS THE SAME as a null modem cable,
>> so you do not have to add a separate null modem adapter at all.
>> 
>> However, the older //c does not use the same cable as a IIc+ (the IIc+ has
>> the same port as the Mac while older //c computers do not).  You will need
>> a "//c to ImageWriter II" cable if you have an older //c, but if you use
>> such a cable, you won't need a separate null modem adapter.
>> 
>> Just plug the DIN 5 end into the //c and the DB-25 end into the PC and you
>> will be ready.
>Hate to hurt your feelings, but an Imagewriter II uses a din8 serial 
>port, not the db-25 like a normal PC serial port.  Ergo, what you really 
>are looking for is a IIc to ImageWriter I cable in order to transfer to a PC.
>
>Good luck hookin' up!

Toby, no need to worry about hurt feelings.  Nobody is perfect and I
just try to help out when I can.  As you surmised, I never had an
ImageWriter II, hence the mistake in the cables.  I always welcome
corrections if something I said is in error.  :)

(I didn't come off as being snotty in the first reply, did I?  I
thought I put a smily face down.  Just trying to help. :)

In any case, thanks for pointing this out.  In summary:

If one wishes to convert between a IIGS or IIc+ and a Mac, then
one would get a "Mac to ImageWriter II" cable, which has the same
plugs at either end (one for the IIGS or IIc+ and one for the Mac)
but can serve as a null-modem between these types of computers.

If one wishes to convert between a IIGS or IIc+ or a Mac and a
PC, then one would get an "Mac to ImageWriter I" cable, which has
a plug for these computers at one end and a DB-25 plug at the other
for the PC.  Again, this cable can serve as a null modem.

If one wishes to convert between a //c and a PC, then one would
get a "//c to ImageWriter I" cable, which as a DIN connector for
the //c at one end and an DB-25 connector for the PC at the other.
However, at least one person, Jack Freiss (thanks!) could not get
this to work, so for the //c it might be necessary to get a "//c modem"
cable plus a null-modem adapter

Sorry about the mistake.  I hope nobody actually went out and got
an ImageWriter II cable because of it.

-Scott G.