On Sat, Jan 14, 2006 at 10:20:08PM -0500, andrew kelley wrote: > Why wouldnt they use PROM's or OTP's? Wouldn't those tend to have > longer lifetimes? Voyager at least seems to use magnetic tape of all things, according to http://voyager.jpl.nasa.gov/science/thirty.html I couldn't find any mention of any sort of ROM, maybe the magnetic tape is all there is? My guess is there is a very tiny hardcoded ROM in there, perhaps even hand-wired considering the age of those probes, and then the tape does everything else. They are very simple computers after all. -- pete@petertodd.ca http://www.petertodd.ca -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist