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Conference 7.286::atarist

Title:Atari ST, TT, & Falcon
Notice:Please read note 1.0 and its replies before posting!
Moderator:FUNYET::ANDERSON
Created:Mon Apr 04 1988
Last Modified:Tue May 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1433
Total number of notes:10312

794.0. "Xmodem, Ymodem, UNITERM help" by COMICS::DSMMGR () Fri Mar 09 1990 07:44

    
    
    Being the new proud owner of a modem, I have been dialling into public
    bulletin boards with the wish to download some of the PD software
    available. I do this using UNITERM (great 8^)) and have had absolutely
    no problems when using KERMIT. Unfortunately, most the the BB's in my
    area don't use KERMIT, but rather Xmodem or Ymodem. Using either of
    these options from UNITERM, I have had no success. I'm sure it is
    something that I am doing wrong but I can't fathom it, and being new to
    comms etc I'd appreciate some advice. Here is what happens.
    
    I dial into the BB and select the file transfer option. After entering
    the name of the file I wish to get hold of I am asked what protocol
    I want to use. I select Xmodem (or equally Ymodem). The BB says 'ready
    to send ?' so I say yes and immediately type Alt-T to get the UNITERM
    file transfer menu. I have by the way previously set UNITERM to use the
    appropriate protocol. From the file selector I type in the receive file
    name and the box showing bytes transfered, errors etc comes up... and
    sits there. After a short time if it indicating no bytes being
    transfered, it shows a BAD COMP message (this is the usual one but some
    times it differs) and that's all that happens. When I type control-c
    and go back to terminal mode I get garbage character on the screen
    which presumeably is the file transfering and so I interrupt this.
    
    What am I doing wrong and what are the recommended settings for X and
    Ymodem. Are there any other tips ?
    
    Thank you very much for the help 
    
    Jonathan
T.RTitleUserPersonal
Name		DateLines
794.1Also, try waiting to see a 'C' before starting.SICKO::PATTERSONEngaged to a RedheadFri Mar 09 1990 11:5917
	I use uniterm all the time, and the only two parts of the setup
	that I change are the packet size and the CRC selection.
	Here is what I use:

		Type		Packet	CRC
		_______		______	_____
		XMODEM:		128	NOCRC
		XMODEM CRC:	128	CRC
		XMODEM 1K:	1024	CRC
		YMODEM:		1024	CRC

	you will notice that Xmodem 1K and Ymodem are the same, the only
	real difference is that Ymodem supports Batch sends.

	Hope this helps,

	Jim
794.2JOVE::reillyMichael ReillyFri Mar 23 1990 17:0715
Actually there is some difference between true (or real) Ymodem and Xmodem-1K.

Ymodem sends file information which Xmodem-1K does not do.  Many BBS's claim
to suppot Ymodem when they really mean Xmodem-1K (DELPHI does this, for
example).  Attempting to use true Ymodem to transfer files to/from these
systems results in failure similar to what is described in .0

I haven't used Uniterm for awhile so I don't remember if it switches into 8
bit mode when transfering or not.  [XYZ]modem require an 8-bit transparent
line (i.e., 8 bit data and no in band flow control (aka XON/XOFF)) while
kermit is happy with XON/XOFF flow control.
794.3CorrectionJOVE::reillyMichael ReillyFri Mar 23 1990 17:093
Re: my last reply.

I was hit by brain fade.  Zmodem can handle XON/XOFF.  [XY]modem cannot.
794.4the solution to .0COMICS::DSMMGRMon Apr 09 1990 12:1125
    Hi again,
    
    I just thought I'd let you know that I made some progress on the use
    of XMODEM for file transfer.
    
    I thought it must be something at my end that was causing the problem,
    but for the life of me couldn't think what. I mean after all XMODEM is
    used by so many BBS's that it MUST work !!!!
    
    To cut a long story short, I have a DECTALK interfaced between my ATARI
    and my modem and so in desperation I removed it. Hey-presto I could
    suddenly receive XMODEM files !! I had rejected this as a possibility
    before because I was able to hook up to the BBS without problem with
    the DECTALK in place.
    
    My only guess is that the DECTALK must have been doing some
    'translation' on incoming messages. I'll have to investigate further
    tonight. I got XMODEM working using XMODEM.TOS so I still have to
    try it from within UNITERM though I anticipate no problems.
    
    Anyway, for what its worth, that's where the problem lay.
    
    Thanks to those who offered help
    
    Jonathan