mdharding@trillium.waterloo.edu (Matthew D. Harding) (07/07/89)
I downloaded ZIP the 115 Kbps file transfer utility and copied it to both my machines. I have a null modem cable that works fine, but ZIP will not. I have the correct port settings on both machines but Zip will not transfer data. The program does recognize the link, or so it would seem. When I put one machine in server mode and the other transfers the server waits ready, the transfering machine says "Testing" and then dies. If I terminate the session on the server, both bail out. This would seem to indicate that some connection is taking place, but no transfer happens. Any ideas or solutions would be very helpful. TIA.
dhesi@bsu-cs.bsu.edu (Rahul Dhesi) (07/08/89)
In article <14963@watdragon.waterloo.edu> mdharding@trillium.waterloo.edu
(Matthew D. Harding) reports problems getting Zip, the 115 Kbps file
transfer utility, to work.
It works for me. Here are some possibilities and how to test for them.
1. Cable: Is your null modem cable really working? Try this: Run
MS-Kermit on both machines, put one end in host mode, and see if you
can do Kermit transfers. If not, you may have cable problems.
2. Interrupts: If Kermit transfers work, but Zip doesn't, it means
the high data rate may be the problem. Remove ALL extraneous software,
even things (like PRINT.COM, RAMdisks, keyboard enhancers, etc.) that
don't seem likely to affect serial port I/O. Many of these utilities
disable interrupts for too long.
3. Cable capacitance: How long is your cable? If it's more than
about five feet, it is possible that shortening it will help. The
longer the cable the mushier signals become as they travel along it,
and at 115 Kbps that could make all the difference. If you are using a
shielded cable, try using *unshielded* ribbon cable.
4. Alternative: Do you have Borland's Turbo Debugger? If so, try
using the high-speed file transfer utility (TDREMOTE and TDRF) that
comes with it. It can be told to use an intermediate data rate rather
than 115 Kbps and might work for you.
--
Rahul Dhesi <dhesi@bsu-cs.bsu.edu>
UUCP: ...!{iuvax,pur-ee}!bsu-cs!dhesijohns@hp-ptp.HP.COM (John_Schubert) (07/19/89)
I have also used ZIP without any problems. I made a suggestion to the author for an enhancement through CompuServe mail and recieved a fairly quick response. You might try contacting him for help. His name and CompuServe address is in the documentation.