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From: jmunkki@kampi.hut.fi (Juri Munkki)
Newsgroups: comp.sys.handhelds
Subject: Re: Downloads of HP-48SX binary files.
Message-ID: <1990Mar24.173103.5051@santra.uucp>
Date: 24 Mar 90 17:31:03 GMT
References: <1990Mar21.142101.28032@cec1.wustl.edu> <3590@sunspot.UUCP> <1461@uc.msc.umn.edu> <1990Mar21.225133.2561@santra.uucp> <53747@microsoft.UUCP> <1990Mar24.113627.25468@santra.uucp>
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Reply-To: jmunkki@kampi.hut.fi (Juri Munkki)
Organization: Helsinki University of Technology, FINLAND
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This is probably my last posting on this subject. My own kermit now talks
with the HP and I know why VersaTerm didn't work in 8 bit mode.

The bad checksums and packet length problem turned out to be handshaking
problems. My configuration packet contained a null where there should
have been a space. This was fine for the C kermit in the unix host, but
the HP kermit was more picky. This caused the HP kermit to resend its
send init packet to which my kermit just sent an acknowledgement packet,
because it already saw a good init packet. The HP never received a complete
receive init packet. In this case, there was nothing really wrong with
the HP.

The problem with VersaTerm also appears to have been an init handshake
problem. When VersaTerm sends a Send-init, it specifies bit-8 quoting.
Normally everyone else is then also forced to use some sort of quoting.
HP kermit is funny in that it sends 'Y' anyway. It uses bit-8 quoting,
since the other end requested it, but it doesn't give the correct prefix
character. Since VersaTerm has already requested prefixing, the HP kermit
shouldn't argue against that. This is a very subtle bug in the HP kermit
and doesn't hurt anything, if your kermit understands what the 'Y' means.

I gave up on MacKermit. I don't recommend it. If you use VersaTerm, use
7 bit transmission with some sort of parity.

   ___________________________________________________________________________
  / Juri Munkki	    /  Helsinki University of Technology   /  Wind  /   HP S /
 / jmunkki@hut.fi  /  Computing Center Macintosh Support  /  Surf  /   48 X /
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