110-in-1 (110 games cartridge)

(sorry if I posted this in wrong section or something)

Bought a few carts from a friend just recently and found this. It did not work despite a good cleaning, so I took it apart.
Maybe someone is interested in this?

Can you read the markings on the top-right-most IC? The rest are easy: GD74LS273, CU444, ET445, ET446, ET442, MC74HC273, SN74LS139.

I assume all four large ICs (xx44x) are ROMs (and not, say, RAM, or a mapper IC)?

Might you be willing to post a picture of the back of the board? (Is there another 32-pin DIP on the back?)

GoodNES seems to think there is a dump of 110-in-1 with 2MB PRG / 1MB CHR, and that it's mapper 225, but mapper 225 only goes up to 1MB/512KiB.

It is a PAL16L8ACN ic.
On the back there are CU447 and ET443

I have a "Supervision 110 in 1 cart" ROM file with mapper #255 according to fceux.

That's... weird. The source for FCEUX doesn't seem to support mapper 255, and the only SuperVision anything it mentions is the same 16-in-1 that GoodNES has.

I always enjoy reverse engineering cartridges... Unfortunately, the next step involves figuring out what pins of what ICs are connected to what else, which is only easily done with a multimeter or a depopulated PCB.

I can't run the ROM file.. and I am too lazy to download an emulator that supports it right now.

The adapter part has 3 resistors, 2x10kOhms and one 100kOhm. 2x9013 npn and a tiny tantal cap (guessing 4.7uF).
It doesn't look like the typical "hack n slash" job (well, except for the rubber tape holding everything in place) from stressed out hand solders.

That's a standard CIC stun circuit (producing negative voltage)

Well at least it isn't a huge blob of hot glue