Re: UD3 ROM on a 3032

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Sun, 30 Oct 2016 18:50:45 +0100 Message-ID: <233540ce-dfc6-a0f9-8587-3c31bde11fc3@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 10/30/2016 06:20 PM, Francesco Messineo wrote:
> Hi all,
> I started working on my 3032 (2001-32), it will be a long project,
> since it's mostly a pile of dirt and rust (I've found it in this state
> 15 years ago, in a side of the street).
> I've seen the UD3 ROM socket populated, here's a picture:
>
> https://www.dropbox.com/s/xx5o8rd6ng75ac8/UD3-orig.jpg?dl=0
>
> I'll be reading the EPROM in the next days, does someone have an idea
> about what might that be anyway?

When dumping the EPROM, please dump it twice, once normal and once with 
a 1N4148 between Vcc of the EPROM and Vcc. Then compare the 2 dumps. If 
they are the same, you can consider it a successful dump. If not, the 
dump taken with the 1N4148 might be correct.

  Gerrit

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