Would it be possible to integrate a 68 position PLCC socket into the design?
Like this one:https://www.mouser.c...Fiy2rc/tN2YUFFe
This would make the mod infinitely easier, just snap on and solder wires to the output connector. The NeoBIOSMasta (https://www.neogeofa...neobiosmasta-og) uses this technique.
Edit: Though this may not be possible due to components too close to the IC.
Anything is possible., I think the board as is would be the next step since it would still be technically compatible with the other 3DO revisions.
I have been too sick to update but I see now there is the same issue with sync across all these 3DO RGB kits.
That sync issue being that the image isn't centered on screen.
It can be adjusted at the TV end but that is not a great solution.
Basically H/V sync is slightly out of time with RGB (I think).
What all the boards need is a monostable multivibrator.
I think the idea is to delay H/V sync (which is already delayed) until it rolls over to being correct again. (really talking out my ass here so I dunno if that is even close to correct)
The otaku board had a solution for this and the specs are out there (in German). Whatever the solution involving the monostable multivibrator is, it should be the same for all these 3DO rgb kits, only slightly different if using the lm1881 (but I may drop that out of my design).
Ill check my notes on this and update when I have more info.
I would normally source this type of stuff but I have no clue where I got it from.
Ill scrub the Otaku board I have here to see what we can learn from it.
Edited by the_crayon_king, Sun Nov 5, 2017 3:36 AM.