Below are simple instructions for installing the MSDOS version of the emulator and running Erwin.

Instructions for Installing Erwin on a PC

1. Download the Erwin.zip file and unzip using Winzip. Remember in which directory you unzipped the file .

2. download the MS-DOS version (not the win95 or win 98 version) of the Mac Emulator from www.ardi.com. NOTE: Srini updated this step with the following in August 2001:

I looked at the www.ardi.com website; while the fully functional version costs $65, it appears that students can still download a demo version of the program (Executor for MSDOS) for free. The demo version lacks some of the perks of the full version - the main drawback is that it is valid for only 30 days. However, this didn't prove to be a problem for me last year, as the Erwin unit was shorter than 30 days. The company appears to have changed its website since last year, and the MSDOS version of Executor is no longer available for download directly from the website. However, I was able to find it on the company's FTP server at the following URL: ftp://ftp.ardi.com/pub/Executor_DOS/ The name of the file to be downloaded is "e21bdemo.zip." I just tried to download and run this file to make sure it worked. While the program started up correctly, I was told that my demo trial period had expired (apparantly, it still remembers that I had downloaded the program last year). However, for students downloading this file for the first time, I don't think there should be a problem.

3. Install the MS-Dos version of the emulator. Remember in which directory you installed this software.

4. Next you will need a Mouse Driver specifically for DOS. Some of you may already have one, but many of you probably won't. I found a driver that worked for my mouse at:

http://www.canada.cnet.com/downloads/0-10112-101-900552.html. This probably works for any standard Microsoft mouse. Download the .Exe file and run it through windows. It will guide you through a simple installation process. Again, remember in which directory the mouse driver has been installed.

5. Now you're ready to put all these three pieces (the emulator, the mouse driver, and the program - Erwin) together.

The following are Josh's instructions for rebooting the computer with a minimal amt. Of drivers.

6. Boot to dos loading the minimal amount of drivers possible. This means, you restart your computer and press F8 immediately (pressing it over and over helps).

7. If you hit F8 quick enough, you'll get a menu of boot options. Choose "step-by-step confirmation." From then on, windows will ask you a bunch of questions, that look kind of like the following (syntax might be slightly different), not necessarily in the following order:

Load windows registry? <--- choose no.

device=c:\windows\system\ifshlp.sys? <--- choose no

device=c:\windows\system\dblbuff.sys

Load startup files? <-- choose yes

Load himem.sys? <-- choose yes

device=c:\windows\system\emm386.exe? <-- choose no

Process autoexec.bat? <--- choose no

load windows graphical environment? <--- chose no

There will probably be more questions, relating to cdrom devices and such. you can choose no for most of those. if you have time, toy around and find which ones you need and don't need. if you don't absolutely need it, you don't want to load it. you do need to load the file himem.sys, and that is a must. oh, and don't worry, when you choose yes and no to these questions, you're not making any change to the configuration of your computer, you're just deciding how it boots on that one single time.

8. So after all of this is done, you'll come to a dos prompt. Change to the directory where you installed the mouse driver. You change directories in DOS by typing "cd" and then the directory name. For example. If I start at C:\> and I want to go to the MSMOUSE directory, I would type: "cd msmouse"

9. Once you're in the directory, type the executable file for your mouse driver. For mine, it was msmouse.exe (you only need to type msmouse, not the .exe part). This will bring up a screen that says "Mouse driver successfully installed" and some other information.

10. Now your mouse should be working. Go to the directory where you installed the emulator and run it.

11. Now you can follow the instructions on the Chem 125 website to get Erwin running ˆ use stuffit expander to expand the Erwin file at which point you'll get a nice looking program icon.

12. Click on that program icon and the program should start. You're finished!

P.S. if you find the emulator starting , but your mouse pointer stuck at the top left corner of the screen (as I did) this probably means you don't have the right mouse driver. You can find plenty of them on the internet for free, so just try a few and find one that works