On 02/07/2011 05:55, terry stewart wrote:
Well done!
Have you tried erasing and reprogramming the 27C16s that didn't quite
work before? I wonder if one or both has a stuck bit, or just wasn't
properly erased. Or maybe they require a slightly different programming
voltage to what you used. Some EPROMs need 25V or 21V, but newer types
often need 13V or 12V. And newer types typically want a shorter
programming pulse, or a series of short pulses.
--
Pete Peter Turnbull
Network Manager
University of York