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Chapter 8 Xmodem Protocol Overview
X/YMODEM Protocol Reference 10-27-87 27
9. MORE INFORMATION
Please contact Omen Technology for troff source files and typeset copies
of this document.
9.1 TeleGodzilla Bulletin Board
More information may be obtained by calling TeleGodzilla at 503-621-3746.
Speed detection is automatic for 1200, 2400 and 19200(Telebit PEP) bps.
TrailBlazer modem users may issue the TeleGodzilla trailblazer command to
swith to 19200 bps once they have logged in.
Interesting files include RZSZ.ZOO (C source code), YZMODEM.ZOO (Official
XMODEM, YMODEM, and ZMODEM protocol descriptions), ZCOMMEXE.ARC,
ZCOMMDOC.ARC, and ZCOMMHLP.ARC (PC-DOS shareware comm program with XMODEM,
True YMODEM(TM), ZMODEM, Kermit Sliding Windows, Telink, MODEM7 Batch,
script language, etc.).
9.2 Unix UUCP Access
UUCP sites can obtain the current version of this file with
uucp omen!/u/caf/public/ymodem.doc /tmp
A continually updated list of available files is stored in
/usr/spool/uucppublic/FILES. When retrieving these files with uucp,
remember that the destination directory on your system must be writeable
by anyone, or the UUCP transfer will fail.
The following L.sys line calls TeleGodzilla (Pro-YAM in host operation).
TeleGodzilla determines the incoming speed automatically.
In response to "Name Please:" uucico gives the Pro-YAM "link" command as a
user name. The password (Giznoid) controls access to the Xenix system
connected to the IBM PC's other serial port. Communications between
Pro-YAM and Xenix use 9600 bps; YAM converts this to the caller's speed.
Finally, the calling uucico logs in as uucp.
omen Any ACU 2400 1-503-621-3746 se:--se: link ord: Giznoid in:--in: uucp
10. REVISIONS
10-27-87 Optional fields added for number of files remaining to be sent
and total number of bytes remaining to be sent.
10-18-87 Flow control discussion added to 1024 byte block descritpion,
minor revisions for clarity per user comments.
8-03-87 Revised for clarity.
5-31-1987 emphasizes minimum requirements for YMODEM, and updates
Chapter 10 Xmodem Protocol Overview
X/YMODEM Protocol Reference 10-27-87 28
information on accessing files.
9-11-1986 clarifies nomenclature and some minor points.
The April 15 1986 edition clarifies some points concerning CRC
calculations and spaces in the header.
11. YMODEM Programs
ZCOMM, A shareware little brother to Professional-YAM, is available as
ZCOMMEXE.ARC on TeleGodzilla and other bulletin board systems. ZCOMM may
be used to test YMODEM amd ZMODEM implementations.