Search results for query: *

Hello again. I just thought of something. Since a lot of those wonderful chips are sold out. Would there be a way someone like myself could have a few made by PCBway in such a manner as to protect your intellectual property and perhaps see to it you're compensated for the reproduction? I dunno...

In the process of ordering a replacement board. I found a source for the elusive GG-2 Prom at 5c from an ebay selle Im sure you all know about at hobby roms. So I'll grab one. (unless suggested otherwise) and report back. I also have some of the ram chips at.. 1a and 1b arriving soon. I'll be...

Thankyou! Incredible someone brave and knowledgeable enough is making them. Too cool!!

Interested in 51xx Galaga Any chance they are still avail?

I'll look at that tonight. Thanks

Well for now I've thrown in the towel. Of course b/c my issues arent resolved but motivated b/c I love to play at least a few hours a week and dislike the inactivity. Probably a major oversight on my part blindly believing I could put 100's if not 1000's of hours on that board and expect it to...

Understood thankyou.

I will contact you soon.

All good brother. Friend of mine has about 16 machines His favorite is Omega Race . I personally admire his star wars machine. All of that is to say. he has a LOT of respect for any and all folks who repair vector games. !!! He stated its on a whole other level of difficulty. And before Hudson...

Wow this is just wild. So lemme address the piggy backing thing. I posted that I read a blog regarding a Galaga PCB repair and the writer mentioned he "piggy backed" a chip. I Never said I would do this (admittedly at the time I was considering it as a means to test without de soldering) and it...

I absolutely did my friend. and this pic is what I found. GG-2 Prom was my staring point. I believe I mentioned this in my 1st post. Finding out what comprises this prom is where I got off the path. So I try other options in an attempt to track down the chip and any such requirements in the...

I don't understand.

Im did my best referencing the Galaga Parts list and the schematic. I've endlessly searched for the GG-2 Prom nothing comes up for me on Google etc. . There are mentions of it in the part list which I posted a link for and in the schematic list. I can show you what I saw with my own eyes if...

Sorry for posting again. Im new here and do not see a way to edit my previous post which would have been more appropriate. I found a better name for the GG-2 Prom its the 74LSI51 chip and uses the 51xx bin file. We'll be working on this as a starting point now that we have a good idea of where...

I have 3 7489 chips on the way, I'll give this a shot. As I've been told the 7489 chips at 1a and 1b often go bad causing this. We are considering reading the GG-2 prom located at 5C, copying the data and comparing it to the original. The challenge is understanding how to find an original to...

Reading the prom was part of his suggestion. Thanks for the advice about piggybacking.

I have a novice friend helping me. Again please excuse my ignorance if I get any technical terms wrong. He suggested we may be able to burn a new GG-2 Prom at 5C (which has been demonstrated to be a common solution for this problem) . I believe he has the necessary equipment and expertise to do...

Thanks for the reply. Suggestions have come from the 7489 (ram) on that side. But also the GG-2 Prom located at 5C. This was documented well in this video on youtube.

They also came out with a video that got me right in the feels. Here it is. based on a true story the writer of the song experienced as a kid.

Thankyou Heres a link to the game