"EADGBE" wrote in message
oups.com...
On May 29, 10:56 am, (Scott Dorsey) wrote:

It may be possible to clone the firmware if you can borrow a good one
from another machine.
--scott

Scott:

Actually, a friend has a CR3a deck that has the exact same IC chip in
it. How would I clone the firmware from his chip to re-program my
faulty chip?




You would need to make a substantial investment in a Programming system -
several hundred dollars - it would be a lot cheaper to buy another used
Nakamichi.

Also, some uControllers have one time programmable Program Memory so you
would need to buy a new blank chip, some have protection systems that
prevent the code being read so you may not be able to clone it anyway (this
is an optional programming tool that can be used at will). You won't know
that til you've spent your several hundred dollars and given it a go, though
the datasheet might give you more info on whether this particular chip has
this facility, the one I found has little detailed information.





Gareth.

In rec.audio.pro Gareth Magennis wrote:

"EADGBE" wrote in message
oups.com...
On May 29, 10:56 am, (Scott Dorsey) wrote:

It may be possible to clone the firmware if you can borrow a good one
from another machine.
--scott

Scott:

Actually, a friend has a CR3a deck that has the exact same IC chip in
it. How would I clone the firmware from his chip to re-program my
faulty chip?




You would need to make a substantial investment in a Programming system -
several hundred dollars - it would be a lot cheaper to buy another used
Nakamichi.

You can buy used PROM burners cheap as all get out.

--
Aaron

wrote:

You can buy used PROM burners cheap as all get out.

Right, it's the programming pods that are the issue these days. Unless you
want to burn 2716s or something.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Scott Dorsey" wrote in message
...
wrote:

You can buy used PROM burners cheap as all get out.

Right, it's the programming pods that are the issue these days. Unless
you
want to burn 2716s or something.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."




Yes, this is not a common part like a PIC or an 8051 based device, where you
could get a programmer and maybe read and write to it. PROM burners have to
know exactly which device they are dealing with, and have the hardware and
software capable of doing so. Its a bit like saying "I've got a computer so
I should be able to connect it to my BMW and reset the mileage".



Gareth.