> > There was another post implying you needed a BIOS swap but you don't need that, all you need is the NTSC CIC chip installed in U10.
> What I mean is... I can get that NTSC CIC chip from a SWC DX copier and from my parodius3 (last one I won't do). But, can I get the content of that chip on the net (the dump of that NTSC CIC chip), then I could create my own chip with a eeprom saver or something like that?
The CIC chip is not an EPROM, it's a custom gate layout, so you can't just grab an EPROM and program it. If you knew the gate layout you could potentially use something like a PAL or a GAL chip to program it but the pinout would probably be different and then you'd have to rework the PCB to get it to work which I don't recommend. And, to my knowledge no one on the net today knows the design of the CIC chips. Bung and FFE obviously reverse engineered (or copied) it but they're not giving out that information.
So in light of that what I would recommend is that you either take the CIC out of your DX (if you can locate it in the DX) or buy a cheap US or SFC cart and pull the CIC out of that.