anti-uv eprom labels

[Chuck Guzis]

On 13 May 2009 at 19:05, Tony Duell wrote:

> Actually, just about anything will do. Unless you're going to be
> leaving this board out in the sun all day, it's not going to get much
> UV light on it. So a paper label on its own should be easily enough.

Anything, including nothing.  I have eproms that were last programmed 
20+ years ago with no label covering the window and exposed to 
fluorescent room lighting and the contents are just fine.  There is 
probably some energy threshold that photons must exceed to effect 
erasure.    Mostly, I use labels to identify contents.

I like the idea of an upside-down eprom, Tony.   Too bad it's about 4 
decades too late!

--Chuck

P.S.  Does anyone have any updates to the software for the EZ-EP 
parallel port programmer?  I've run into some Winbond fash chips that 
the programmer doesn't handle correctly--even though it correctly 
identifies them.