I had to fix Turkey Shoot and Joust 2 years ago without this information. it was pretty abysmal. mostly what inspired me to get out of fixing those completely.
Yeah, having a tough time with this one myself.
Thanks Brad, but these are the ones I'm working off of. The CPU #2 is completely unreadable. Inferno is the closest match to Joust 2 so certainly the best option. I have to work off the Turkey Shoot schematics for now just for legibility. They are close, but there are differences. When it comes to the video board, they used 2 50+ pin custom chips. The Turkey Shoot and Mystic Marathon doesn't have those chips and the Inferno schematics that I have, I can't read what the I/O lines are labeled or what some of the pin numbers are. That's where the ole' DMM comes in the to check continuity. Just going to take a while.
Even though the board is slightly different from Joust 2/Turkey Shoot, here's a link to the Mystic Marathon schematics:
https://arcarc.xmission.com/PDF_Arc...hon_Drawing_Set_(16-3008-103)_May_15_1984.pdf
Wow, these are fantastic scans. I should be able to get through the CPU board with these schematics. At least these are legible. There are some differences, but this will take care of 90% of the CPU board. Thanks. The video board is going to be the challenge. They replaced some of the chips with 50+ pin customs... (See above) LOL
@64B1T: Thank you for your efforts. Despite them not panning out, every bit of help is greatly appreciated.
Thank you all for trying and helping out. Unfortunately, I have to use KiCad to do this and I'm not familiar with all the functions. I usually use DipTrace, although I only have the hobbyist license and that limits me to 500 pins. It's a lot easier to use, looks better and I like the interface more. It does have some library limitations. But, in order to recreate these schematics, I've found I have to make my own part symbols anyways to match the symbols they originally used. KiCad is easy enough to figure out the basics. I'm having trouble understanding how they do nets and I don't like the way it does the labels. I'm only interested in making the schematics and exporting them as PDFs, so I don't care about the nets. Not like I'm going to have a PCB manufactured. When I'm done and someone wants to edit the nets and have fully linked nets or want PCBs made, by all means, I'd share the KiCad files.
P.S. The image I supplied in an earlier post is certainly not the high resolution of what I'm working with. That was just a quick screen shot for display purposes only.
