Newbie here toooooooo on the Mach3... while I have not even turned a motor shaft with it yet, I have managed to get it going on my Dell GX1. I have my Galil 1880 installed, and it is even the Rev E card with the PnP chip on it. It took just a bit to get it registered, but it did, and Mach3 appears to be talking to it, and it thinks it is sending commands to some thing.
I have a motor plate that is less than 250 lines of code, and I could cut that for 6 months before it got more complicated for FREE it seems like. However, with the support of this forum, and the emails from the Yahoo groups on this product, $160 is a steal.
Thank you Art and others involved to the development daily, and to this forum for the sharing of the development from your side.. makes a newbie coming in feel real welcome.