Date   : Wed, 18 May 1983 12:04:00 EDT
From   : Eliot Scott Ramey <ELIOT@mit-dms.arpa>
Subject: XM74LBR.PAT

                           XM74LBR.PAT
                         by Eliot Ramey
                           (05/18/83)

       I have found in not only neccassary, but very convienient to
library many files on my RCP/M disks.  Many people do not always recognize
certain files as being in a package due to non-standard naming conventions,
so a library groups the files and people can easily tell that all the files
are related.  Also, by librarying files I can save directory space which
is limited to 64 entries on my system.  The side effect of librarying files
is very large files which could take hours to download at 300 baud.  The
solution is to only allow members of the libraries to be downloaded, and
not the whole library.  One prevents a file from being downloaded by
"tagging" the high bit on the first byte of the file name, and xmodem
will not send that file.  The way XMODEM74 has been written, it will not
allow this file to be accessed by any means.  I wanted XMODEM74 to access
this file IF the user was using the "L" option in xmodem.  The following
patch will allow xmodem to send members from a library file, but will not
allow sending of the entire .LBR file.

OPENOT:
       lda     optsav
       cpi     'L'
       jz      openok2

Find the label OPENOT: in XMODEM74.ASM and insert directly after the
label the three lines shown in lower case.

                                       Happy downloading,
                                       Eliot S. Ramey
                                       Arlington RCP/M
                                       (703)536-3769 (300-710 baud)