Is there a good description of the various forms of ROM/PROM/EPROM bit rot phenomena on the web somewhere? Or could someone provide a good description? I know in the case of EPROMs the charge will eventually "leak". And with masked ROMs and PROMs the "fuse" can actual re-grow and turn a 0 into a 1. We've discussed it briefly before. More detailed information would be appreciated. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]