Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!sunybcs!boulder!pikes!bscott From: bscott@pikes.Colorado.EDU (Ben M Scott) Newsgroups: comp.sys.amiga Subject: Re: XPRZmodem Summary: JModem isn't the greatest Keywords: ZModem JModem Message-ID: <3423@pikes.Colorado.EDU> Date: 19 Mar 90 06:41:34 GMT References: <90031706131933@masnet.uucp> Reply-To: bscott@pikes.Colorado.EDU (Ben M Scott) Organization: University of Colorado, Denver Lines: 25 > there is a protocol FASTER than Zmodem, called > JModem...Its on IBM bbs's sometimes, Jmodem is potentially faster than ZModem, but it does not have many of the 'modern conveniences' that I think many of us have grown accustomed to...like sending the filename for downloads, or Batch/Resume, nor is it a streaming protocol like Zmodem as it has to acknowledge each block sent, thus decreasing throughput. Also, it only has a 16-bit CRC, and Xon/Xoff characters are not escaped. Still, the file compression done is guaranteed not to increase block size and under good conditions it can use up to 8K blocks (which is why it's often called JModem 8K). The author of the protocol until recently ran a BBS in my area which I called from time to time. Just a little while back I came upon an Amiga port of JModem implemented as an external protocol a'la DSZ. I have not tried it yet due to the previously listed shortcomings, but it does exist. I don't know where you can get it, though; I've forgotten where I got it myself. . <<<>>> -- _______________________________________________________________________________ | | | Someday, I'm going to make up a clever .sig file like everyone else has... | |_____________________________________________________________________________|