| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1533.1 | 3 wires did it for me | FORTY2::TATHAM | Nick Tatham @REO | Wed Jul 13 1988 07:43 | 15 |
|
I have my amiga connected to my rainbow and can VT200/kermit files back and
forth OK.
I made my own cable with:
Pin 2 TD to Pin 3 RD data one way
Pin 3 RD to Pin 2 TD data the other way
Pin 7 SG to Pin 7 SG ground
ie only three wires. Both ends support Xon Xoff and it seems to work fine.
The three core cable I used was unshielded and was thin enough to be run
around the house without showing too much.
Nick
|
| 1533.2 | | ULTRA::KINDEL | Bill Kindel @ BXB1 | Wed Jul 13 1988 13:50 | 16 |
| Re .1:
I'd also suggest turning DTR (pin 20) around to appear as DSR (pin 6)
and turning around RTS (pin 4) to appear as CTS (pin 5) at each end.
That way, both computers will think they're dealing with a real RS-232
link which is always ready to receive data. For purity you could
actually make these connections across the cable, but they're not
necessary for what you're doing. You might also want to have DTR hold
RLSD (pin 8) high.
I recently made up a six conductor cable with DSR/DTR turnarounds at
each end and CTS passed both ways to be RTS at the other end. (Since
the cable was three twisted pairs, the TD and RD were each paired with
a ground line; the CTS' are the third pair.) It's good enough to fool
an RS232 application into thinking the other end is a laser printer.
|
| 1533.3 | Thanks for .1 and .2 | SANFAN::BARRETODE | | Thu Jul 14 1988 15:43 | 11 |
| Thanks for the suggestions. I'd tried the cable you suggested in
.1 (I'm made up for my printer) but my DECMEX comm program wouldn't
send any files over it. Didn't error on me, just acted as though
there was no one on the other end to talk to. I assumed that some
signal was missing, making DECMEX think there was no one else there.
I'll try it again tonight, and if that doesn't work, I'll try the
expanded version from .2.
Thank you both again for your help.
|
| 1533.4 | BC22D-25 Works OK | DPDMAI::ANDERSONA | | Sun Jul 17 1988 23:23 | 7 |
| I took the easy way out. I am using a BC22-D to connect my Amiga
to my Rainbow. Then I use LCTerm/VT200 at 19200 baud XMODEM to
transfer files to my Amiga. The same BC22-D works for my Amiga
to LA50 connection. The BC22-D is a 12 pin null modem cable.
Alan
|
| 1533.5 | Thanks, it almost works! | SANFAN::BARRETODE | | Wed Aug 03 1988 16:37 | 19 |
| Hey, I made some progress! Tried my 4-wire printer cable again
and was able to move files from the Robin to the Amiga. Turns out
the problem was in my understanding of my DECMEX program--you can
bring files into it and send them to any disk, but you can only
send them out from the system drive.
However, I still can't send files from the Amiga to the Robin.
The Amiga gives me a response time-out. This will take some more
research, but at least now I know it's possible.
Thanks for all the response I got on this question!
Terry
P.S. Unless you've experienced it, you can't know how good it feels
to see your data moving at 19,200 instead of 1200 baud!!
|