Path: utzoo!attcan!uunet!cbmvax!sterling
From: sterling@cbmvax.UUCP (Rick Sterling QA)
Newsgroups: comp.sys.amiga
Subject: Re: Atalk III 1.0e
Message-ID: <5744@cbmvax.UUCP>
Date: 20 Jan 89 12:15:04 GMT
References: <5707@cbmvax.UUCP> <6842@killer.DALLAS.TX.US>
Reply-To: sterling@cbmvax.UUCP (Rick Sterling QA)
Organization: Commodore Technology, West Chester, PA
Lines: 39

In article <6842@killer.DALLAS.TX.US> elg@killer.DALLAS.TX.US (Eric Green) writes:
> in article <5707@cbmvax.UUCP>, sterling@cbmvax.UUCP (Rick Sterling QA) says:
> > In article <6818@killer.DALLAS.TX.US> elg@killer.DALLAS.TX.US (Eric Green) writes:
> >> Let's say that your file length is an exact multiple of 128 bytes.
> >> Further, let's say that your file ends with fifteen NUL characters.
> >> Xmodem will not create an extra empty padding block. Thus an
> >   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >> autochopper will chop off 15 bytes of your file.
> >> 
> >  According to my reading of the protocol it should create the extra padding
> >  block with ^Z's ... This is how I implemented it in several term progs in
> >  the past....
> 
> If I called your system (which creates the extra padding blocks) with
> my CP/M system (a Commodore 128 running MEX), and uploaded a binary
> file, then downloaded it back to myself, what I got back would be
> incorrect.
> 
> CP/M is the ultimate test of whether an Xmodem protocol is "right" or
> not. If it don't work under CP/M, it ain't Real Xmodem.
> --
> Eric Lee Green    ..!{ames,decwrl,mit-eddie,osu-cis}!killer!elg

 What's CP/M ? ;-)

 Guess I should have qualified the above by saying that this is the 
 required logic for non-CP/M systems to transfer arbitrary length files when
 the protocol does not transmit file length info. At worst it would add
 a block to a file for CP/M systems but it would never lose file data.

 - Rick -

 
 
-- 
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   Rick Sterling             COMMODORE AMIGA TEST ENGINEERING
      N2CGI                  UUCP  {allegra,rutgers}!cbmvax!sterling 
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