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000078_news@newsmaster….columbia.edu _Tue Jan 5 10:05:22 1999.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Help-CP/M to Mac Xfrs fail
Date: 5 Jan 1999 15:05:19 GMT
Organization: Columbia University
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In article <3690CA49.BBB68321@isltd.insignia.com>,
dave <dave.richemont@isltd.insignia.com> wrote:
: If anyone remembers what a PCW8512 was :-), can you pls help.
: Setup is Kermit-80 v3.9a on the PCW, and version 0.993 on the Mac, both
: with default settings, using a straight cable to connect the serial port
: of the RS-232 attachment on PCW to Mac modem port.
: I have sent several text files from PCW to Mac successfully, using "send
: (file)" on CP/M followed by "Receive file" on Mac.But lots of times the
: send fails with "Unable to rcv acknowledgement from host" on the CP/M
: side and then "Sent too many NAKs" on the Mac. Does not appear to be a
: simple h/w problem, as packets rcvd on Mac match number of zeros
: displayed on CP/M, so the 2 Kermits are still talking.
:
Unfortunately, neither CP/M nor Mac Kermit have good facilities for debugging
file transfer failures, such as packet logs.
However, sending to the Mac should not be as problematic as sending to CP/M,
since CP/M tends to "cut out" for long periods of time while writing to the
disk.
Suggestions:
1. Tell CP/M Kermit to "set flow on" and Mac Kermit to use Xon/Xoff flow
control.
2. Make sure the cable didn't wiggle loose.
3. Try the current version of CP/M Kermit, which is 4.11:
http://www.columbia.edu/kermit/cpm.html
- Frank