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It didn't work when I bought it
Yesterday I desoldered its PRG and CHR and took them out
I was surprised when I found out that Punch Out is a 256KB game
But as you can see in the pictures the PRG and CHR have only 28pins!
28pins EPROMs like 27C512 can only contain up to 64KB
Anyway I set my Willem EPROM programmer to 27C512 and dumped those PRG and CHR
CHR is OK to some extent and I can see the Punch Out graphic by using TLP
But PRG is severely damaged and that is why the whole cartridge didn't work
Then I noticed that there is an option for 1Mbit (128KB) EPROMs
I used two 29F040 as PRG and CHR then I tested the cartridge with a fresh Punch-Out!! (U) [!] and fortunately it worked!
You know FamiGOD demands sacrifices now and then, so here it goes, may FamiGOD accept it

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Is it possible to convert these TTLs to FPGA or CPLD?
If so which one is better to use?
And what part number should I use?
Is it possible to add some more TTLs to make MMC4?