Yes, it was interesting. Like an engineering notebook, but filtered for what worked, removing almost every dead-end. Keeping some dead-ends to explain rationale for next decision point. I can imagine the engineering team meeting; do we need those resistors on the serial bus? Can we remove the firmware blob from the eMMC? Can we sign the firmware and have the PIC verify the signature? Can we do bounds checking on every piece of data from the outside? --=20 James Cameron http://quozl.netrek.org/ --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .