TECHNICAL INFORMATION DOCUMENT

TITLE:  PTF282 - Mapchan Patch
DATE:  02OCT95
README FOR:  PTF282
PRODUCT and VERSION:

UnixWare 1.1

Installation Instructions:  

DATATYPE: datastream

1.  Download the ptf282.Z and ptf282.txt files to the /tmp directory  
    on your machine.

2.  Read the release notes contained in file and follow the instuctions 
    to add the package to your system.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

        $ su
        # uncompress /tmp/ptf282.Z
        # pkgadd -d /tmp/ptf282

ENGINEERING RELEASE NOTES
-------------------------

Title
-----

PTF282 - Mapchan Patch

Product And Version
-------------------

UnixWare 1.1.1, UnixWare 1.1.2, UnixWare 1.1.3, UnixWare 1.1.4

Abstract
--------

Allow use of mapchan for parallel printers

Symptom
--------

Mapchan does not work for parallel printers


SOLUTION SPECIFICS
------------------

General Description.
-------------------

This patch installs an updated mapchan command that allows Unix
parallel printer output to be mapped onto different character
sets.


New Features.
------------

None

Software Notes and Recommendations.
----------------------------------

This PTF is intended for UnixWare 1.1.4 through UnixWare 1.1.4
systems which have the Enhanced Application Compatibility (acp)
package installed and on which it is desired to map the parallel
port printer output onto different character sets.

Testing of the modified software contained in this package has
been conducted only to the extent necessary to confirm that it
resolves the problem(s) stated above ("Symptom").  Such testing
consists of recreating the problem conditions and verifying that 
the problem no longer occurs.  No other testing of this software 
has been done.

Hardware Notes and Recommendations.
----------------------------------

This PTF is targeted for the i386, i486 and Pentium CPU's.

Usage Information.
------------------

Because the parallel port is open only while output is actively
being printed, the mapchan command is effective only when it is
placed in the interface file for the printer device.  In
addition, because the parallel port has already been opened for
writing, additional opens are not permitted, which requires that
the "current channel" form of the command be used, that is:

	mapchan -f mapfile

(no "channel" specified on the command line)

Users wishing to implement mapchan for parallel printers should
be aware that standard printer configuration via Printer_Setup
creates interface files (in /etc/lp/interfaces) that are actually
symbolic links to a "library copy" of one of the commonly-used
interface scripts (in /usr/lib/lp/model).  Before editing an
interface file, the symbolic link should be deleted and replaced
with an actual copy of the interface script.

In most cases, the mapchan command should be inserted immediately
before the while loop that does the actual printing.  In the
provided scripts, it begins with the following line:

	while [ $i -le $copies ]

and is near the end of the script.  This will result in "mapping"
the output data, but not the banner page.  If it is desired to
"map" the banner page as well, the mapchan command must be added
earlier in the script, before printing the banner page.