Another Panasonic HHC

Right, so it's not the (3rd party) unit that I now have. Let me ask a few questions about the SNAP development box : What sort of EPROMs are used (how big, etc) ? What else is in the unit? My investigations of the logic board have shown that there are a number of chip select lines brought out on the expansion connecotr, but there's no sane way to put 4 EPROMs directly on that connector. I would guess at least there's a 2-4 line decoder. And probably some transsitors to swich the Vcc to the EPROMs to save battery power (the HHC itself does that trick). These components may well be SMD on the back side of the board, BTW. I am wondering if it would be possible to make a clone of this unit, using, say, one 16K or 32K EPROM suitable connected. Are the EPROMs a rare type? Or could you get new ones and burn the images into them. -tony