[Techtoolslist] Eprom checksum

[Mike Coates]

If you know what version you have, you can reprogram a bit-rotting eprom 
with the same code again, just to refresh the parts that have faded (and 
save erasing the whole thing first)

On 01/04/2013 03:28, Jose Luiz Martins wrote:

> Uauuuu!!!!!!!!!!!!!!!!!!!!!!!!!  I was writing something like this to

> flippers when received your email!

>

> I'm facing exactly SAME problem with many Taito boards.

>

> Some 2716 and 2516 are even testing as blank!

>

> I did some research and the EPROM live time is guaranteed for about 10

> years, but many of my boards has between 25 and 30 years old.

>

> Called one friend today, asked him to test some boards and the result is

> the same problem.

>

> I think we should consider some plan against this suicide EPROM behavior.