Subj : DOSEMU, PKZIP and DPMI
To   : All
From : Dan Clough
Date : Sat Jun 29 2019 10:08 pm

Hi all, I'm reposting the below message, with the original
author's permission, because I think it may be helpful to many
sysops...


 * Originally in: FSXnet BBS Support/Dev
 * Originally on: 06-29-19 20:40
 * Originally by: Netsurge

PKZIP and dosemu don't play very well, especially if you are using a 64bit
linux os.

There is a way to disable DPMI (which causes the issue) via command line, 
by adding -) to the command line, but that really doesn't help if the zip
and unzip routines are hardcoded into software, like interlord.

Alas, after a shit load of research I have found a work around.

First you will need pkzip 2.04g (google for pkz204g.exe or ask me to drop it
in your inbound).

Create a directory via dosemu to house pkzip and pkunzip (I created one in my
doors dir called pkzip).

Copy and run pkz204g.exe, it should uncompress all the PK stuff into
doors/pkzip.

Create a file in your pkzip dir called pkzip.cfg and add the following to
that file:

DPMI=Disabled

Next you need to set the path for your pkzip folder and disable dpmi for
pkunzip via your autoexec.bat. Edit autoexec.bat and add the following to
your path statement:

d:\doors\pkzip (where ever your created your pkzip folder)

so my path statement looks like this now:

path z:\bin;z:\gnu;z:\dosemu;d:\doors\pkzip

you also need to add the following to your autoexec.bat file right after your
last lredir statement:

SET PKUNZIP=-)

Now exit out of dosemu and head back into it so that your new autoexec.bat
takes effect.

As to why PKZIP uses a cfg file and PKUNZIP requires a variable set is beyond
me, why not use either or for both. Then again, we are talking about the
90's here/

You should now be able to run pkzip.exe and pkunzip.exe from any directory
without getting the dreaded DPMI error.

If you have any questions, there is a huge discussion on SciNet in the
gaming echo about beating dosemu into submission when it comes to running
old dos door games in linux.

|15frank |08// |15netsurge
|07disksh0p|08!|07bbs |08% |07bbs.diskshop.ca |08% |07mystic goodness 
|11SciNet |03ftn hq |08% |07https://diskshop.ca/scinet

=== Mystic BBS v1.12 A43 2019/03/02 (Linux/64)
 # Origin: % disksh0p!bbs % bbs.diskshop.ca % SciNet ftn hq % (21:4/154)
--- SBBSecho 3.07-Linux
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