I was wondering if anyone has seen this or played with it? http://research.microsoft.com/en-us/downloads/02e2edbf-c76c-47d5-b9c0-2c9915c63e98/default.aspx It does incorporate some SIMH components, namely the MicroVAX II stuff... I found it on some stray google query about VAX's at Microsoft back in the 1990's. Anyways, I thought I'd pass it along. Jason