Re: 2764 -> 2364/68764 adapter

From: Francesco Messineo <>
Date: Tue, 12 Jul 2016 19:13:09 +0200
Message-ID: <>
On Tue, Jul 12, 2016 at 6:59 PM,  <> wrote:
>> On 2016-07-12, at 18:49, Francesco Messineo <> wrote:
> Hi Francesco! :-)
>>> There are various adapters for replacing 2364 mask ROM with a JEDEC compatible EPROM. What about the other way around adapters? Has anyone got something for putting the 2364/68764 into a 2764 EPROM socket?
>> Why anyway would you [want] that?
> a) for testing existing ones in circuits that are made for the JEDEC chips
> b) for dumping existing ones with devices/programmers, which are not pin compatible

of course I didn't think about that since I have a couple of
programmers that can read
the old 2364-compatible pinout.
One is an "original-clone" of the Promenade-C1 by the way :-)
A friend of mine made some clones back in the '80s because we couldn't
in general afford
original hardware down here. The first defective clone was mine for
free if I could fix it. And I did fix it.
Another programmer I have (Data I/O 21A) can read and program the
MCM6876x (and the ricoh cmos, but not the 27HC641)  but I think the
programming algorithm for them is buggy. I'm in touch with the person
who has all the old Data I/O documentation to try to make a fix for
The Promenade still rocks with those old EPROMs :-)


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Received on 2016-07-12 18:00:02

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