Rev.C is not tested! So far only Rev.B has been tested with an 8Mb game on a 29F800 in a 32-pin socket, and it was found to work. It should work fine with a 29F160 since the only difference is one additional address pin.

This adapter installs on the backside of a SNES mask ROM. You must cut or isolate the /OE pin on the mask ROM and tie it to Vcc.

This adapter is made to work on both 32-pin and 36-pin mask ROM sockets. If using on a 32-pin socket, you will most likely have to cut off the 4 pins for clearance. You could score both sides with a utility knife or X-Acto blade and then snap it off, or use small flush cutters.

If you are using a 29F160 on a 32-pin socket, you will have to use a jumper wire for A20.

J1 connects /OE from the mask ROM socket to the TSOP chip. If you are only using a single TSOP chip, then you must close J1. If you leave J1 open, then you can use the /OE solder pad on this adapter to connect the /OE pin of the TSOP to where ever you need it.

J1 is a new jumper pad footprint that has not been tested yet, but hopefully works fine.

C1 is for an 0603 0.1µF decoupling capacitor.

Don’t forget to isolate the bottom of the adapter to prevent shorts.

Revision History:

Rev.C 1. Changed J1 from 0603 to new (untested) jumper pad (updated tolerance) 2. Cleaned up some traces and various tolerances 3. Enlarged silkscreen indicators from 32 to 40 4. Added Vcc via to C1 pad, removed extra vias 5. Moved /OE solder pad, more clearance from surrounding vias.

Rev.B 1. Widened cutouts around pins 1, 2, 35, 36 2. Added more ground and Vcc plane area 3. Changed DIP socket to round holes with larger drill size . 4. Added silkscreen identifiers for DIP pins on read side.