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We would like to know the pinout of your C3B chip, it would be valuable add to our wiki, since all we ever knew of this bootleg MMC3 chip came from pictures and we can't tell all the connections that way (though krzysiobal did attempt). Would you please help us with that unusual pinout? You could ju...

Most NES/Famicom ROMs use a fairly consistent but non-standard pinout for their ROM chips. I am not really clear what you are asking about the adapter. Are you wanting to remove the ROM chip(s) from your cartridges, and insert the chips directly into the adapter? Or are you wanting something that yo...

Wow, that is really great info. LSI-1 is the RF5A18, sure enough with internal CPU. Interesting to see LSI-2 (RF5C66) containing "Disk Drive Interface". There have been a few things found very similar to FDS. Though I don't see the RAM or ROM necessary for FDS unless it is lurking somewhere inside t...

That's pretty funny. Back then that probably literally WAS secure to do things like that and trust your 8-bit Nintendo to your bank account and gambling addictions. Those were the days. I have been thinking more about how I saw constant activity when looking at the control signals going to the RF5A1...

Is this from a prototype FDS image or a ROM? Maybe the FDS itself has undiscovered/hidden registers.

Connect: 00 0F 00 88 30 42 30 20 36 34 32 35 36 34 36 36 36 24 ASCII: "...ˆ0B0 642564666$" Disconnect: 01 01 00 01 30 42 ASCII: "....0B" I find that this part of the connect message comes directly from the microwire EEPROM data: 0 642564666 This is either range 0x13-1C or 0x23-2C of the EEPROM, wit...

Here are more connect/disconnect sequences: Connect: 00 13 00 42 31 20 36 33 57 30 36 30 33 31 33 35 38 35 35 24 67 25 37 31 ASCII: "...B1 63W0603135855$g%71" Disconnect: 65 02 00 02 00 20 ASCII: "e.... " This one blows away the theory about the byte counts not including %'s. This one's byte count i...

I improved my register capture gizmo tonight. Before, it was totally asynchronous, so at any time the address bus was changing, there was a chance I would get triggers. To fix that, I put my output through an additional 74LS74 D-flip-flop, which will pass address matches through only on the rising e...

Looking more at the byte counts of the first 2 columns of connection data: byte counts.png The byte count of the top one is 0x13, and the bottom one is 0x20. Assuming that it is a 16-bit little-endian byte count, shown are selections of this size. The top one is for some reason 2 extra bytes and the...

Thanks for the info and the link. I am a little nervous about it still but I will see what I can come up with.

Edit:
I wonder if I can use a VoIP adapter? This is probably going to generate a North America style dial tone but maybe that's OK?? I am looking into it.

Do you know, is the idle voltage a DC voltage? And then the 400Hz tone is a small signal added on top of that? Edit: I found this with some more googling: Off-Hook: -7 to -12 Volts DC. Ringing: -48 Volts DC, plus 100 Volts RMS @ 20 Hz On Hook: -48 Volts DC I guess I didn't realize that telephone sig...

I actually have an isolated electronic AC source that can generate 400Hz at those voltages. I am a little scared though, unfortunately it isn't easy to find a confirmation of that voltage in Japan anywhere.

Does anyone know much about dial tones? I would like to simulate a Japanese dial tone and put it into my Famicom modem and see what that does. Without a phone line hooked up, right away the software detects this and aborts, before ever attempting to dial any numbers. If I could trick it to think the...

I took some more data from Super Mario Club opening a phone connection. I took this in both the normal mode where you don't enter any numbers and also in the 2nd mode where you do enter some numbers. I don't have any idea what they do, but I attached the register write sequences from different numbe...

Hi sydsydsyd, welcome. Someone might already be familiar with your board but I don't find any clone MMC3 pinout for "C3B". I think it will be a good idea to use a continuity tester and see where each pin of each chip connects. For example, clip 1 lead of your continuity tester to a pin, then brush y...