This ngpc circuit is correct？

[Thomas]

What do you want to test?  Are you making your own cartridge?

I had download one ngpc SDK, there are some samples and tools, On base that, I can do some small game on ngpc, and I hope it can run well on real console.
I saw the original cartridge is so simple， just one chip on it.  I dont know if it is only one mask-rom, or decode+flash.（I don't know what storage format is）
I had drawn one pcba according to this circuit, and burn the demo program， But it not work.
The FPGA cartridge is too complex and expensive.