OSR2FIX
	This is a program written by someone else that tweaks Dos 7.1 so you can run Windows 3.1x. This page is an attempt to tell you how to do it and what to expect when you do. I take no responsibility for anything. Except good stuff.

First of all, you need a copy of OSR2FIX. It originally comes from http://win95.winware.org, and I have a copy here. It's a Dos self-extracting RAR archive, so if you don't have a RAR program then put it in a folder of its own and run it.
Next, look inside the newly-created Win3x.bug folder. You'll see four files:
- File_id.diz - a description of what it is
- Msdossys.inf - a Win9x "Setup information" file that sets "bootgui=0" and "logo=0" in msdos.sys. As you probably know, this will make Win9x boot to the c:\ prompt and not show the startup logo - just like Dos 6.
- W3xstart.doc - Not a Word document, I've changed mine to .txt. This is the documentation for the program, which is...
- W3xstart.exe
I'd recommend that you read w3xstart.doc, or, even better, print it out. It contains lots of DOS lines so it looks odd in Notepad and right in Edit. It's fairly heavy going, which is why I've made this.
Right, now we get started. However, it would be a very bad idea to actually do it before reading the whole of this page.
Reboot with your Windows 9x startup disk.
Go to where you put w3xstart.exe and run it.
You'll see this:
1. Go on, modify IO.SYS 2. Something went wrong, restore ! 3. Abort

Choose option 1. It'll backup c:\io.sys, and patch it.
Reboot without the startup disk. You want to boot to the command line - hold Ctrl while booting in Win98, and I think you have to press F4 or F8 at a certain time when booting in 95. If that doesn't work, shutdown and "restart in MS-DOS mode" from the 9x desktop.
Now it's time to install Windows 3.1x. It is incredibly important that you don't let it install over Win9x or modify autoexec.bat and config.sys. To do this, choose "custom setup" when you run setup.exe from disk 1, and when it offers to make the changes to the startup files, choose the last option, saying you'll manually change them later.

Right, you've got Win31x installed. Now you need to make a batch file to prepare a Win9x-set up Dos for Windows 3.1x. It needs to be of the form:

path c:\win31\windows;c:\windows\command smartdrv c: cd\ win31\windows\win.com path c:\windows;c:\windows\command Set path for Win31 - c:\windows\command is equivalent to c:\dos on Dos 6. Win31 needs this - Win9x has it built in. \ You need to run it from c:\ to | avoid the spurious FAT errors / (which are not true). Change path back to what it was for Win9x.

You can embellish this with things like choice.com. It's also important to make sure your CD-ROM device drivers are loaded, as well as mscdex.exe - the driver loading has to happen in config.sys and the best place for mscdex is in c:\windows\dosstart.bat (which is run when you "restart in MS-DOS mode") - add a line like "call c:\windows\dosstart.bat" to your Win31 batch for when you boot straight to Dos. Phew, that was a long sentence!
Here is my win31.bat:

@echo off
choice /n Do you really want to start Windows 3.1?
if errorlevel 2 goto no
if errorlevel 1 goto yes

:yes
path c:\win31\win31;c:\windows\command;c:\dosutils
call c:\windows\dosstart.bat
smartdrv
c:
cd\
win31\win31\win.com
path c:\windows;c:\windows\command;c:\dosutils

:no

Now you're pretty much done. Put the batch file somewhere in your path and give it a suitable name, like "win31.bat".
To get straight to Win31, boot to Dos and type "win31" (or whatever). From Win9x, Shut Down... -> Restart in MS-DOS mode, then type "win31".
You will, of course, now have to spend ages setting up Win31 with Calmira, All3D, sound card and graphics drivers...

Running Win 3.1x from an icon

You can set up an icon in Windows 9x (mine's on my desktop) so you can just double-click and go to Windows 3.1x. You will need ExitExec, a tiny program that calls Windows' ExitWindowsExec function. You can get it from calmira.org/downloads (opens in a new window). You then need to create a shortcut, and possibly another batch file. The second batch file is needed if you have things in the first (like choice and/or pause lines) that you don't want when you enter Win31 from the icon.

The shortcut should point to exitexec.exe; the complete commandline (the "Target" edit box in the shortcut properties dialogue) should be like this:

"C:\Program Files\Win31 starter\EXITEXEC.EXE" c:\windows\command.com /c C:\PROGRA~1\WIN31S~1\WIN31.BAT

ie. Exitexec needs to be passed "command.com /c batchfile.bat". It's also important to put the short filename path to the batch, because when it comes to be run, the computer will be in Dos and without LFN support.

All being well, if you open this shortcut, your computer will exit to Dos, run Windows 3.1x, then when you exit Win 3.1x it will probably reboot. Oh, and here's an icon for your shortcut - it's shown on the right.


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