On Sun, Oct 23, 2011 at 5:40 AM, RussellMc wrote: > FWIW - the eg MC6800 makes this easy. The 8080 makes it hard. The Z80 > adds icing to the 8080 cake. I presume it doesn't count if you started with assembly and hand assembled to hex? I can't be the only person to start my low level programming career with a ZX81, armed only with a manual and a hex editor. Chris --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .