From: Gabriele Bozzi (mabuse68_at_gmail.com)
Date: 2006-07-16 18:28:20
Oh dear... Once I tried, really, but one week later I went down to town to buy my eprom eraser!! Eproms are one of the most fabled ant FUDded item of electronics, I found a no-nonsense guide to Eproms at this address: http://www.xtronics.com/memory/how_EPROM-works.htm It is really well written and, as far as my knowledge on the matter goes, fairly accurate. Anyway your answer is: depends on the weather, altitude, latitude, season and humidity, just some short calculations (which do not pretend to be assertive, do not flame me): - A common eprom eraser like mine takes 5 minutes to bring all 1s to surface. - A mid-summer Northern emisphere location at Sea level, 60% humidity, sunny exposure (75% of total sunlight): ~ 15 days But you could be particularly lucky and live on top of the Matterhorn (or, in your case the Kebnekajse I suppose), as I said: your mileage may vary by mean of a lot of parameters. ;-) Gabriele On 16 Jul 2006, at 17:56, Spiro Trikaliotis wrote: > Hello, > > I just successfully programmed some EPROMs of mine (27C256). > > Ok, this is not very interesting in itself. Anyway, now, I wanted to > clear them again. Thus, yesterday, I put them in the sun (the whole > day). I hope them to be empty, but they are not. Both still contain > very > many of the programmed bytes. > > Does anyone here have experience how long I need to put them in the > sun > to completely erase them? > > Regards, > Spiro. > > -- > Spiro R. Trikaliotis > http://www.trikaliotis.net/ > http://opencbm.sf.net/ > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing list
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