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Article #1462

Error-Checking Xfer Protocols

#1462
From: Chuck Forsberg
Date: Mon, 07 Mar 1988 23:03
20 lines
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>has been).  Any number of these 'new' protocols (SEAlink, Zmodem,
>etc...) are available only on Mess-DOS machines, and are a pain to
>implement, if not impossible because of memory constraints on 8-bit
>machines.  WXmodem gives significantly better performance than
>'vanilla' Xmodem, while retaining the comparative compactness of
>implementation, though it is somewhat more complex.
>
>		      ---- George Madison
>
It's not the memory requirements that stop them dead in the tracks,
it's the concurrent I/O requirement.  Zmodem provides a mechanism
for dealing with this, and you might see something along these lines
in the future.  Of course, without concurrent I/O, you won't get
all of the high throughput ZMODEM is famous for.

Chuck Forsberg WA7KGX          ...!tektronix!reed!omen!caf 
Author of YMODEM, ZMODEM, Professional-YAM, ZCOMM, and DSZ
  Omen Technology Inc    "The High Reliability Software"
17505-V NW Sauvie IS RD   Portland OR 97231   503-621-3406
TeleGodzilla BBS: 621-3746   CIS: 70007,2304    Genie: CAF
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!omen.UUCP!caf
From: caf@omen.UUCP (Chuck Forsberg)
Newsgroups: comp.sys.misc
Subject: Error-Checking Xfer Protocols
Message-ID: <KPETERSEN.12380592216.BABYL@SIMTEL20.ARPA>
Date: 7 Mar 88 23:03:00 GMT
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