LDIRB
                           Version 2.1

                        September 6, 1991


LDIRB, originally written by Steven Greenberg, is a library 
directory utility that shows member files along with their create 
and modify dates, sizes, compression method, and their 
uncompressed filenames.  It will run under vanilla CP/M 2.2 and 
CP/M Plus, but offers several enhancements when run under ZCPR3.

USAGE:

     LDIRB {dir:}lbrname {afn.typ}

A DIR (named directory) or DU (drive/user) specification is 
accepted under ZCPR3.  Under vanilla CP/M only the drive is 
significant.  If an ambiguous file specification is given 
following the library name, only matching member files will be 
shown.  If no member file specification is given, all member 
files will be shown.

A final summary line shows the number of matching member files 
found.   If the wheel byte is set, the summary also shows the 
number of active files in the library, the number of deleted 
files, the number of free directory entries, and the total 
directory entries.

If a crunched file contains an embedded comment, it will be 
displayed up to 18 characters.  Otherwise, the uncrunched or 
unsqueezed filename will be shown.

The length of member files is shown in records (sectors) and in 
kilobytes, including fractional parts of a kilobyte (.00, .12, 
.25, .37, .50, .62, .75, or .87, indicating 0 to 7 additional 
records.

If no dates are found in the library directory, crunched files 
are checked to see if they contain embedded datestamps.  If so, 
they are displayed instead.

LDIRB pauses with a "[more]" prompt after each screenful until a 
key is pressed.  Entering ^K, K, k, ^X, X, x, ^C, C, or c anytime 
aborts the program.  Except at the "[more]" prompt, a ^S pauses 
the display until another key is pressed.  Typing a space at any 
time sets the line counter to one for a "line by line" advance.

For additional system security, LBR files with the SYS attribute 
set will be ignored if the wheel byte is reset.

Under ZCPR3 the program error flag is set to FFh if no matching 
member files are found, to 10 if the library file is not found, 
or to 4 if the library is corrupt.

CONFIGURATION:  LDIRB should be ready to use "as is" with  no 
configuration necessary for either RCP/M systems or individual 
use.  There are three configuration bytes, however, that may be 
changed if necessary.

Setting the byte at 10Bh to a non-zero value will force LDIRB to 
warm boot on exit.

Under ZCPR3 the number of screen lines and the wheel byte address 
are obtained from the environment descriptor.  On other systems 
the number of screen lines can be set at 10Ch.  The default is 
22.  The wheel byte address can also be installed at 10Dh-10Eh 
(low byte first).  The default address is 3Eh.

For version history, see LDIRBnn.HIS.