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000034_news@columbia.edu _Mon Jan 17 12:55:52 2000.msg
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Article 10956 of comp.protocols.kermit.misc:
Path: newsmaster.cc.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Bootstrapping CP/M Kermit ....
Date: 17 Jan 2000 16:08:25 GMT
Organization: Columbia University
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In article <948121940.19822.0.nnrp-11.9e983d0c@news.demon.co.uk>,
Paul Bigwood <paul.bigwood@kbcomms.demon.co.uk> wrote:
: Many years ago I remember seeing a program ( 8080 ASM CP/M code) to
: bootstrap Kermit using DDT under CP/M.
:
: I'd like to locate the program again if anyone can recall it or any pointers
: to suitable source. This machine is an AMSTRAD
: 8256 with those funny 3" floppy drives. I've got a CP/M operating system
: disk and SID ( CP/M 3 replacement for DDT.) on the machine. No Basic so the
: boostrap code in the Kermit manual is no good.
:
: I've downloaded the AMSTRAD 8256 Kermit version from Columbia, but of course
: can't get it into the machine.
:
The program you're looking for is in the CP/M Kermit manual:
ftp://kermit.columbia.edu/kermit/a/cpkerm.doc <-- Plain text
ftp://kermit.columbia.edu/kermit/a/cpkerm.ps <-- PostScript
- Frank
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From: jaltman@watsun.cc.columbia.edu (Jeffrey Altman)
Subject: Re: MS-DOS Kermit, more capabalities
Date: 17 Jan 2000 16:34:19 GMT
Organization: Columbia University
Message-ID: <85vgab$6h8$1@newsmaster.cc.columbia.edu>
To: kermit.misc@columbia.edu
This is simply a brief follow up to address specific technical issues
not touched by Frank's reply. -jea
In article <011700040222not-2-disclose@the.net>,
<not-2-disclose@the.net> wrote:
: Isn't there any MS-DOS `Kermit' update in preparation
: that will offer `ZMoDem' file transfer capability?!
No.
: What about the
: suggestion from Charles Angelich that `Kermit' should be able to "share"
: the internal stack/~TelNet~ stuff with an external (`ZMoDem') protocol?!
How could this possibly work is the single tasking environment of DOS?
In 32-bit Windows, Unix, or VMS it is possible to run multiple programs
at the same time because there is a task scheduler in the operating
system. DOS does not have one.
In order for Kermit to be able to share the TCP/IP stack with an external
Zmodem process it would be necessary for the Zmodem process to be built
with internal support for the same networking features as are built into
Kermit. This supposed Zmodem implementation does not exist.
Even if you could find a Zmodem implementation that implemented a TCP/IP
stack, you would have the problem of how does Kermit transfer the state
of the TCP/IP and Telnet state machines from one process to another.
The answer is that it is not possible to use an external protocol
implementation over TCP/IP socket. The only way that Zmodem could
ever be used is if it were built into Kermit. As we have stated
previously, no one at the present time is working to implement Zmodem
in MS-DOS Kermit. If you want to implement Zmodem in MS-DOS Kermit
be our guest. The source code is available. However, as the source
code is copyright you must submit your changes back to Columbia
University for distribution. You cannot distribute the altered
software yourself.
: I discovered that i could access my ~SMTP~ server on ~IP~ port #25 but
: `Kermit' is the only program not to allow me such access if i try! Why?
Spoofing is just what you think it is. It is someone sending mail via
an e-mail address which either does not belong to them. The usual
purpose is to SPAM or commit fraud. Are there other ways to do this? Yes.
But a decision was made a long time ago that MS-DOS Kermit should not
be a tool that could be used for this purpose. Therefore, port 25 is
blocked.
Jeffrey Altman * Sr.Software Designer * Kermit-95 for Win32 and OS/2
The Kermit Project * Columbia University
612 West 115th St #716 * New York, NY * 10025
http://www.kermit-project.org/k95.html * kermit-support@kermit-project.org