What about the dynamic MOS shift registers in the video? When I had to do Apple I repairs in the early 80's these were "out of production" parts, but I could always start tearing apart some early-to-mid-70's video terminals and find some in there. If you like the Apple I architecture, sure, it's a fine thing for you to do. I'd put my own efforts into other architectures (the TIMSAI is one obvious example), but I readily admit that the choice is obviously up to the whims of the builder and nothing else! Tim.