@avcrypt 5V EPROMs may be out of production, but they're superseded by 5V NOR Flash which is in production. SST39SF040 is a popular one. It's a great improvement, as the game itself can write to this memory.
I've been supplying an assembled NES cart board (GTROM) for the last 10 years, and it's was around $1.10 for that 512kB flash during most of that time. Probably costs a little more by now, but availability hasn't been a problem.
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Re: "This Cartridge Is A Tiny Time Bomb" - Limited Run Accused Of Selling Carts Which Can Damage Your NES
@avcrypt 5V EPROMs may be out of production, but they're superseded by 5V NOR Flash which is in production. SST39SF040 is a popular one. It's a great improvement, as the game itself can write to this memory.
I've been supplying an assembled NES cart board (GTROM) for the last 10 years, and it's was around $1.10 for that 512kB flash during most of that time. Probably costs a little more by now, but availability hasn't been a problem.