19 Feb
2006
19 Feb
'06
2:07 p.m.
There's a 27C256 on it and a 20 MHz XCO and some
assorted glue.
The largest package is a Mitsubishi MN8601ME1, 64 pin
"shrink DIP".
Next to it is a MN8611A 42 pin "shrink DIP" and a QFP MN51040MGU,
which I believe is a gate array.
Does anyone have a clue as to what the heck this is?
Some Mitsubishi MCUs have 65C02 cores in them, do you have a dump of
the EPROM yet? The contents of that are probably your best clue.
Lee.
19 Feb
19 Feb
2:45 p.m.
That's what I would have done--unfortunately, the EPROM's long gone. Sigh.
Cheers,
Chuck
On 2/19/2006 at 8:07 PM lee at geekdot.com wrote:
There's a
27C256 on it and a 20 MHz XCO and some assorted glue.
The largest package is a Mitsubishi MN8601ME1, 64
pin "shrink DIP".
Next to it is a MN8611A 42 pin "shrink DIP" and a QFP MN51040MGU,
which I believe is a gate array.
Does anyone have a clue as to what the heck this
is?
Some Mitsubishi MCUs have 65C02 cores in them, do you have a dump of
the EPROM yet? The contents of that are probably your best clue.
Lee.
3:01 p.m.
On 2/19/2006 at 8:07 PM lee at geekdot.com wrote:
Some Mitsubishi MCUs have 65C02 cores in them, do you
have a dump of
the EPROM yet? The contents of that are probably your best clue.
...and my bad--I read the logo wrong. It's a Matsushita (Panasonic) MPU.
Cheers,
Chuck
6:54 p.m.
Update: The MN8601ME1 chip appears to be Matsushita's version of a 12MHz
HD64180--at least tracing the pins for address and data on the PROM and the
clock input pin matches up with the 64180. My guess is that the MN8611A is
a largish SRAM chip--I'll see if I can find something that matches up.
File this one away in the "What is it?" file.
Cheers,
Chuck
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