Hi Guys:

I'm working on a "tractor performance monitor" from a farm tractor. It
uses an 6803U4 micro and I gather that the main program is stored on a
TC5518 static ram which is battery backed up. The problem came about
when the lithium cell went dead and the static ram lost it's contents.
I do have another working monitor, but does anyone know a way to read
it while it's still on the board? The board was manufactured in 1988.

I was thinking about soldering a 3 volt source to the ground and Vcc
leads, and then use my pocket programmer (II) to read the good one?
This static ram chip is pin for pin compatible with a 2716 eprom!

Can anyone suggest any other means of extracting the data, and
reburning it onto the original 5518?

If you could, also send me a reply to "tedd at ve3tjd dot com".

Thanks for any assistance.

Tedd, VE3TJD