ARM is a lovely core to work with, but check: 1) Does the controller kit come with software development tools? Last time I looked, ARM were charging around £5K per user... 2) Be careful which ARM processor you decide on: I have chosen one (SAMSUNG) in the past only for it to go out of production after a total life on six months. OK for a one off, but a PITA for production. 3) If you talk to the importers, processor samples can be available. (A box of chocolates can help here!) Since I normally figure that something is going to go catastrophically wrong with the first built sample, I like to have three or more of every device handy. Normally it doesn't, but I've been burnt by only having one device before. Literally, as it happens... :laugh: 4) JTAG is definitely a goodie. If nothing else, it defines a way to get the data into the in-circuit programmable devices! Good luck! Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.