Recent content by selu

Don't worry, your board model is complete. There are three bootleg versions of P47 (one with a single Yamaha chip, one with two Yamaha chips, and one with a Yamaha chip and an Oki chip). It is very likely that the lack of sound and the graphical errors are due to dirty or defective ROMs. I would...

Ohhh, great. So it seems we've solved the problem. I was sure it had to be a loose connection. Even so, with the arcade board powered on, try gently touching the multi-PCB (always wearing latex gloves), applying light pressure, to see if the graphical glitches reappear. That way, we can...

Are there no more graphical glitches for now?

In my opinion, it's a loose connection in one of the ROMs on the multi-board. Do you have a logic probe or oscilloscope? I would check for data flow on the Data Outputs pins of ROMs 27C322 and 27C801 (Q0-Q15 for 27C322, and Q0-Q7 for 27C801). If either of these pins shows a sustained "1" (5V) or...

Hmm... strange. We'd have to check the contact of each ROM chip with its socket on the multi-board. I'd also check the condition of the pins on the four connectors between the multi-board and the System 16 motherboard. Is the multi-board oriented correctly (see minute 5:00 of my video). Are...

Yes. That might be the problem.

Hi, metalslugaddict. The T48 works very well for this task. I did the entire installation and flashing with this programmer and had no problems. I think you should remove the 0078 security chip in position C (next to the 68k). It's a protección IC i8751. My video might help you ( View...

Yes. 100%working.

Great.

Yeah!!

A colleague from MameWorld (Robbbert) told me where to upload dumped ROMs. We should do it at "[email protected]". I'm mentioning this in case anyone else has the same question I did and needs to send their dumped ROMs to the Mame team.

Is there anyone who can modify the existing MAME core from the original P-47 arcade board (P-47: The Phantom Fighter) to run these ROMs I've dumped from bootleg pcb? This way, they could be included in a future version of MAME.

Greetings, everyone. This is my first post, and I hope I'm writing in the right place. I just dumped the ROM set for the P-47 bootleg PCB: The Freedom Fighter, and I wanted to share the documentation file for this board so it can be used to repair other PCBs like this one. As I've attached in...

The damage doesn't seem too serious. Simply joining the broken section of the trace should be enough. Soldering a small wire to both ends of the trace would suffice (or resoldering the pad with a single solder point, as I mentioned, if possible). As for desoldering the crystal, it can sometimes...