[Coco] EPROM question
devries.bob at gmail.com
Wed Feb 6 16:30:11 EST 2008
I don't have a Videotex terminal, but I do have my disk controller from
circa 1983 which is fitted with an EPROM. That controller still works fine.
Here's an excerpt from the 27128 datasheet regarding erasure:
Research shows that constant exposure to room level fluorescent lighting
could erase a typical M27128A in about 3 years, while it would take
approximately 1 week to cause erasure when exposed to direct sunlight.
Regards, Bob Devries, Dalby, Queensland, Australia
Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.
my blog: http://bdevries.invigorated.org/
----- Original Message -----
From: "Joef6809" <joef6809 at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, February 07, 2008 7:09 AM
Subject: [Coco] EPROM question
> Does anyone know how long an EPROM can retain its memory. I remember from
> the data sheets that the stored data will degrade over time but I don't
> remember how long it is. I'm asking as I just bought a Radioshack Videotex
> terminal from Ebay and oddly enough it has an EPROM instead of the mask
> rom I had expected. BTW does anyone else on the list have one and does it
> also have an EPROM?
>>From Hell's heart I STore Accumulator B at thee!
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