I’ve got a bit of a weird issue. I mainly use a PS2 with my board and it was working fine for a while. Now my PS2 doesn’t recognize the board anymore. I’ve remade multiple cables as a test and none work. I can confirm the PS2 still recognizes other controllers and the board works with my PC, dreamcast, wii, etc.
Anyone else run into this PS2 problem?
Have you tried re-flashing the firmware? Sometimes it can ‘corrupt’.
Never heard of that one, was that ever an issue in the past?
Did you try the 2nd player port to see if it has the same issue there?
Yes, it’s happened to me and customers of mine before where the MC Cthulhu and Kitty boards would suddenly stop being recognised, though a re-flash would fix it.
That’s really odd, I wonder why it would corrupt like that? For you and your customers, was it always PS2 only? If that’s the case, that’s interesting because out of all those consoles the PS2 is one of the few supplying less than 5V. I wonder if that’s related.
I just tried that and had no luck. I used the firmware from this post Am I missing something in connecting the MC Cthulhu?
@PAS.Timothy I did, still not being recognized. I even tried on a completely different PS2.
From memory I only had and heard problems relating to the PS3 and PS2, but yeah… sometimes the firmware would just conk out and need repairing. No idea what would cause such a thing but re-flashing was a reliable fix.
Sorry it’s not working in this instance : (
You still have the USB jack on the board? Can you try connecting a USB cable to it and plug the USB into the PS2’s USB slots, in addition to the normal PS2 cable connector. I’m wondering if there is a power failure and it can’t get enough, so the USB will also supply power by adding a low voltage to it. The other consoles like the DC supply 5V and the board is working on those. With the normal controller cable and an extra USB cable you should get that 5V. If it still fails then it’s unrelated to inconsistent power and I have no idea what’s going on.
I just tested that and it didn’t work either 
Thanks for the support.
I’ll test your board once I get it in the shop and probably send out a replacement for you unless you’d prefer a refund. Let me know.
It’s too bad that there’s no support from Toodles on the MC Cthulhu anymore.
I remember him saying a long while ago that he couldn’t fit Wii Classic Controller onto it due to space restrictions; and I was ok with it back then since there was GameCube support and we could use the GameCube ports on the Wii.
Nowadays, Wii CC support would be awesome to have because of the popularity of the NES and SNES Classic consoles. I’d gladly have some of the more uncommon platforms cut out (Turbografx, 3DO) in favor of Wii CC…
Oh well, the dream. 
Well, there was the Pii Wii board for a while.
Also the way some of the TG16/PCE games are, they don’t like the MC Cthulhu.
I am here hoping for some modern TG16/PCE support in the future.
At least Brooks is making a combo Genesis/PCE adapter.
Yeah, I remember the PiiWii. Although my main point was that it was too bad Toodles couldn’t fit the PiiWii code into the MCC.
I never got any back in the day, but I wouldn’t mind a couple of PiiWiis now for my NES/SNES Classic Editions. I have a few 3P Wii CC padhacks sitting around, but you can’t beat the compact formfactor of a custom PCB.
I’m having trouble getting the RJ45 connection to work.
I soldered a cat 5 ethernet cable (t-568b) to the GABCDEFV points following this diagram:
I tested continuity between the solder points and the male RJ45 plug and everything looked good.
I created two cables: an RJ45 to USB, and an RJ45 to Dreamcast following these diagrams:
Continuity tested both cables, and again everything looked good.
I flashed the MCC board with cthulhu.2.3.1ms.hex and that seemed to work as well:
Fired up the Dreamcast to play some Soul Calibur and it didn’t work. I tried both the P1 and P2 ports and the Dreamcast was not recognizing at all.
Next I tested it on my Win 10 PC and Rasberry Pi using the RJ45 to USB cords. Again, nothing.
The board itself seems to work otherwise. When I plug it into my PC using the USB cable, it seems to recognize it just fine in the Game Controllers interface and all the buttons and joystick directions register just fine:
Any suggestions for what to try next?
On the cables, make sure you don’t have the wiring backwards on the RJ45 connectors
Am I looking at this wrong, or are these two diagrams in conflict?
The second diagram has pin 1 where the top one has 2, 2 where 4 is, 5 where 1 in, 4 where 3 is, and 5 where 1 is.
Can anyone confirm what the correct layout is? In particular, which one, if any, corresponds to this table in terms of which one is GND, which one is VCC+5v, etc.:
Thanks.
Your understanding of the DC pinout is fine.
Just watch out for your Ethernet cables.
Some standards have wires 1-8 being
Whichever standard it is doesn’t make any difference for console cable purposes, but you’ll still need the right continuity, of course.
I believe he’s asking about the two pinouts being different from each other. How is he to know which is which?
I have a DC cable around somewhere. I’ll verify try to verify which is which when I get a chance. Actually, it doesn’t matter, because if you look at how the numbers correlate to the pins on the Cat 5 they’re the same. For example, Pin 1 (top) or Pin 2 (diagram) both correspond to pin 8 on the Cat 5. If you use just the diagram by itself, you’ll be fine, or if you use the text + photo you’ll be fine. They don’t contradict each other only the naming of the pins on the DC cable.
@PAS.Timothy
My bad, I didn’t catch that part.
@7ony
You should follow the numbering that’s part of the documentation for the wiring if you’re following the RJ-45 pinout. The photograph you posted is an old one from another thread.
Bottom line is that it doesn’t matter what each contact point is labelled; what’s important is that the right connection is made: ie, in the case of the Dreamcast cables, the right-connector on the bottom with 2 connectors on the rounded side connects to pin-8 on the RJ-45; or the middle connector on the top with the 3 connectors on the flat side connecst to pin-1 on the RJ-45, etc.
Use a multimeter if you’re not sure what goes where.
You guys were right. I stuck to just using the diagram and it worked. I was able to create a functioning Dreamcast cord and a USB cord.
The next issue I’m having is with Soul Calibur 2 on the original Xbox. Has anyone got this to work? I’ve tested the MCC on several original Xbox games, including Dead or Alive 2, and it works flawlessly. Then, I load up Soul Calibur 2, and it doesn’t recognize the MCC at all.