I have been asked many times by REMS Sysops for a xmodem routine which
uses CRC as opposed to the checksum one they have now called XMODEM1/CMD.

After hacking and testing for a solid month I have taken apart Xmodem1
and rehacked it so that it will support CRC mode. It's not a great hack
but it does work.

I don't know who wrote the Xmodem1/CMD program so I don't know who to give
credit to in the first place. I have seen a program called XMODEM3/CMD which
can use CRC OR CHECKSUM. However it resides in the wrong place in memory
for use with BASIC and secondly its plain old too big for the LOW MEM area.

XMCRC/CMD resides from 2600H to 2FFFH, you can use the SAME command line
structure you used for XMODEM1. Of course now you can give your users a
choice as to which protocol they want to use. Either CRC or CHECKSUM.
Obviously this will have to be done in your Basic program since my code nor
the XMODEM1 code checks for it. I'll leave the coding up to the individual
Sysops since I am not familiar with REMS nor Basic all that much anymore.

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This program took many more hours of hard work than even I anticipated. I am
not going to call this shareware since I didn't write it in the first place
(I don't think the author was all that proud of it anyways since it didn't
contain his name in it either), but I would ask that if you are going to
use it on your BBS, you kindly donate $15.00 to cover a small portion of the
cost involved in modifying it for CRC mode.

Send cheques or money orders to :

         Mel Patrick, 13699 70A Ave., Surrey B.C., Canada, V3W 2J8

Thanks in advance.
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If anyone needs techincal information about this program, you can write me
directly (please include .40c for return postage) or you can call my own
BBS (FastPlus II) at (604) 594-7398, 300/1200/2400, 24 hrs.

If any supporter requires the source code for whatever reason, please contact
me as to availability, format and cost.
******************************************************************************

Enjoy.

Mel
