Re: trying to identify a rom...

From: Francesco Messineo <*francesco.messineo_at_gmail.com*> Date: Thu, 18 May 2017 21:49:28 +0200 Message-ID: <CAESs-_w3K7W+GsdkEY_Ty=nw7fFD20mrMDzX-qYd4sW56P7aKw@mail.gmail.com> · francesco.messineo_at_gmail.com

On Thu, May 18, 2017 at 9:45 PM, Gerrit Heitsch
<gerrit@laosinh.s.bawue.de> wrote:
> On 05/18/2017 09:34 PM, didier derny wrote:
>>
>> Hi,
>>
>>
>> I tried to read it as a 2532  I get 2k of FF and 2k of real code (visibly
>> 6502 opcodes)
>>
>> but I tought it was a 4k eprom
>
>
> It could still be a 4K (EP)ROM, but it could also mean that only half of it
> is used. Unprogrammed EPROM cells read as FF.

well, of course might be a fully working 4K ROM with only half of it
programmed :)
I forgot this case :)

Frank

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