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000278_cbfalconer@worldnet.att.net_Mon Jul 16 11:14:11 EDT 2001.msg
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Article: 12610 of comp.protocols.kermit.misc
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Message-ID: <3B52EB7D.2238FE2B@my-deja.com>
From: CBFalconer <cbfalconer@my-deja.com>
Reply-To: cbfalconer@worldnet.att.net
Organization: Ched Research
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Newsgroups: comp.os.vxworks,comp.arch.embedded,comp.protocols.kermit.misc
Subject: Re: Kermit for VxWorks
References: <9ikjrq$asm@watsun.cc.columbia.edu> <slrn9l56t3.3oo.caf@omen.omen.com>
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Date: Mon, 16 Jul 2001 14:34:04 GMT
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Chuck Forsberg WA7KGX wrote:
>
> In article <9ikjrq$asm@watsun.cc.columbia.edu>, Frank da Cruz wrote:
> >
> >From time to time, we get requests for Kermit file transfer software
> >for VxWorks. I'd like to be able satisfy them.
>
> What many of these embedded applications require is a memory
> efficient implementation devoid of Unix-isms that gives
> excellent results with software the customer has already
> paid for (i.e., the Hyperterm that comes with Windows).
>
> Industrial ZMODEM has been used with chips as primitive as
> the 8-bit 8051 family. It does not need an operating
> system, just a small number of user supplied routines.
Some years ago ZMODEM was the standard file transfer protocol on
Fido and BBS systems, and quite a few other places. I don't know
what underlies FTP protocol, but I have the impression that it is
less efficient than ZMODEM.
I believe you have published the ZMODEM specifications, but have
you ever published complete sources for both receive and transmit
modules, and if so how portable are they? Can the system be
mapped into the streaming capabilities of the C file system, or do
they require char by char hardware interfaces?
--
Chuck F (cbfalconer@my-deja.com) (cbfalconer@XXXXworldnet.att.net)
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