Hi George, 

For the MP-1 mod, I DIDN'T USE A CUSTOM PCB. It is generic stripboard.
Of course, to put any dual-inline-pin IC onto stripboard, you have to
cut the traces, or get a stripboard which is prepared for this use
already. 

It is very simple: 

 	* There are only two resistors and a 100 uF capacitor, plus a long
jumper wire to help with the capacitor.
 	* Also: a 300 mil wide 28 pin socket for the chip, and two rows of
headers in the 600 mil width to simulate IC pins to go into the MP-1
socket.
 	* The jumper wire conveys the ground from pin 14 to an extra
strip-board trace that runs parallel to pins 1 and 28. Pin 1 is the
"VCAP" pin on the new chip: NC (not connected) on the old. 
 	* Thanks to the above jumper wire, we can nicely mount the capacitor
between VCAP and GND, since these are on adjacent strip-board traces.
_You cannot easily see the wire in my pictures because I routed it under
the IC socket!_
 	* HEADER PIN 26 IS NOT INSTALLED, SO PIN 26 OF OUR IC SOCKET DOES NOT
CONNECT TO PIN 26 OF THE MP-1'S SOCKET. This is due to the concern that
the MP-1 drives pin 26 high with too stiff a voltage source (it is
directly tied to +5V) which will overpower the Cypress chip's attempt to
pull pin 26 low during the AutoStore operation, which will cause that
operation to abort. 
 	* Instead, we connect pin 26 to +5V (obtained from pin 28) via a 10K
resistor, like in the datasheet. This means pin 26 is held high by us,
and the chip is able to easily pull it low when it needs to.
 	* Pin 27 ("WE": write enable, active low) is also connected to +5V
through a 10K resistor. This is due to a recommendation in the data
sheet, to prevent a possible situation whereby the SRAM contents become
corrupt on power up due to flakiness on the WE line. 

So you can see that the two resistors and disconnection of Pin 26 are
due to diligent adherence to the data sheet; perhaps the chip can work
without them. 

Crude diagram: