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you're right i see "gnd" at positions 13 and 32. can't remember where i read position 1 was ground, must be confusing it with something else. I wonder if it's necessary to interrupt them both...

are there multiple grounds on the rom chips?

I saw some talk on this topic in an earlier thread, but I want to get into it more.
Now I'm thinking leave rom 1 in there, solder wires from its leads to rom 2 shoved elsewhere and I'd only put a switch on their ground wires. Anyone who's actually done the soldering required for the cart slot ought ...

I would be happy if my portable had only the 12 games from radica #1 and #2, do you think it's feasable to to wire the radica to a new board with roms from both radica 1 and 2 and toggle between them with the ground (1st position on the rom if i'm correct) instead of to a cartridge slot - or maybe a ...