Interesting stuff about RFI:
Heresay: One of the PDA manufacturers supposedly had problems with their product locking up if a cell phone was used close by. Personal experience: In a previous job, I used to develop software for embedded controllers. These programs had to survive real-world interference such as electrical shocks and failing power supplies. The software had to continually verify that its own program was operating correctly. This included things such as repeatedly telling an input that it was an input not an output, verifying that the CPU stack has not overflowed, verifying that each parallel software task was being executed every now and then, being sure that the EEPROM memory was kept intact despite impending power-loss, and repeatedly telling attached hardware what it should do again and again in case electrical noise zapped the communications wire between parts and confused something. The consequences of not doing this right might for example involve a product which suddenly could not work any more if the power was cycled on and off with a particular timing, followed by a recall of all the products sold up to that point all over the world for reprogramming. But it had to be that particular milliseconds timing of on/off power cycling to scramble the memory... All of this is just software glitches from noise and power-loss even though the hardware continued to work. Brian http://www.bdphotographic.com
