Curious, I tried the other one I had and it didn't work with the 2716 module either. But when I tried it with the 2708 Gang module that it came wih it worked fine. Suspecting a bad module, I tried the 2708 Gang module in the first one but it didn't work with that either. So not only the 1st M900 I have is bad but so is the 2716 module that came with it. Doubly weird. The manual has a very good troubleshooting section. When I have some time I'll try to find out what the problem is. In the meantime, I sure wish I could get this Apple ][ Copman EPROM Writer card I've got working. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]