To upgrade the KPC-3+ to 512K RAM the easiest method is to do the
following.

1. Order up a 512K RAM chip from Toshiba, part number TC554001AFT.
This is a 32-pin TSSOP package. The DigiKey order number is
TC554001AFT-70L-ND and costs about $4.50 USD. This is the 5V version
of the chip.
2. Order up a TSSOP to DIP adaptor. This is DigiKey part number
A323-ND and is priced around $11.00 USD.
3. When the parts come in, solder the Toshiba RAM to the adaptor.
4. Move the jumper for the RAM setting, J14 on the version I have.
5. Remove the old RAM, U14 on my version.
6. Install the new RAM that is on the adaptor. Watch for the pin-1
orientation.

With this done, I can easily put on the cover; the new RAM is lower
than the surrounding parts. And best of all, it end up below $15 USD,
less shipping and handling costs.

Oh, DigiKey's web site is http://www.digikey.com.

Any other questions, feel free to contact me at .

Derek
KE6JTP