
            Some useful hints on using the v1.2 patch files.
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

                         Last Change: 18/3/94


First off, please tell me if these instructions contain any
innacuracies!

Anyway...

(before I begin, note this: running the patch file will DELETE your
old-version saved games, so back them up if you want to keep them, just
in case. Anyway...)

To use the patch, place the patch files in your Doom directory and
enter:

  patch

However, read on before you try this. You might just save yourself
a lot of trouble...


                           Before you try...
                           ^^^^^^^^^^^^^^^^^

If you are about to use the 1.2 patch, or if you have already tried but
are encountering difficulties, then the following hints may help:-

The patch wants a clean version of the v1.1 game to update with. Any
modifications made to doom.exe or doom.wad will halt the patch. If you
have problems, try re-installing the v1.1 game from scratch and running
the patch again.

If you've used the use1_94.bat file to switch to the 1.94 DOS extender,
then enter:

  use1_95

and try the patch again.

(Thanks to Chris Pollard (Xmastree@Sound.Demon.Co.UK) for the
following tip concerning FILE_ID.DIZ...)

I have been told that the patch needs the original FILE_ID.DIZ. If
you just copy the patch files from the unzipped file straight into
your Doom directory, then the original FILE_ID.DIZ will be overwritten.
Hence, try unzipping the patch zip file somewhere else, and then
renaming the FILE_ID.DIZ from the patch zip file to FILE-ID.DIZ or
something, and then copying them to the Doom directory. This way, the
patch program will find the original FILE_ID.DIZ. Then, afterwards,
rename the new DIZ file back to FILE_ID.DIZ.


If you still get an error, try entering this instead:

  patch -ignoremissing

This might work, but not always. As someone else who mailed me said:

"...The patch computes a checksum of the original files before touching
them and complains if the checksum doesn't match. Using the option
-ignoremissing is OK if an original unimportant file is missing (e.g.,
LICENSE.DOC). However, if the "bad checksum" complaint comes from one
of the important files (DOOM.EXE, DOOM.WAD), using the above option
will simply prevent the old file from being updated and the game will
still not work.".

It appears there are still some problems out there. If anyone has any
other tips on how the patch can be made more likely to work properly,
please email me so that I can update this help file.

Note to Australian players: it has been mentioned that some players
received an older version of Doom 1.1 that the patch does not work
with. If, after trying everything, the patch still does not work, then
contact your dealer/supplier. They should be able to help.


)*--------------------------------------------------------------------


This help brought to you by:

Ian Mapleson,
Department of Computer Science and Electrical Engineering,
Heriot Watt University,
Riccarton Campus,
Edinburgh,
Scotland,
United Kingdom.

email address: mapleson@cee.hw.ac.uk

Doom on! :)

