I'm going to be taking down my Williams System 3-7 web page in the next few months so I thought I'd invite anyone who wants to download the test roms to do so. I've included the source code for those who want to make their own roms. You can find them at:
System 3-6: http://www.smokingcircuit.com/system-3-6-software.html
Sytem 7: http://www.smokingcircuit.com/system-7-software.html
Thanks,
Tim