u/RGBeter

I bodged a CXA1645 onto a SNES and modified the original transistors to set the level properly. Extremely cursed but good results, and may be a way to replace the original Rohm parts if a PCB was made. Last photo is composite on a CRT.

Finally built one of these boards designed by StarlightK7 (sold by 1up restorations too if you're in the U.S.) and am very impressed. Used a parts NES to build it and it's AV quality is MUCH better than stock.

Managed to acquire an MV4 for relatively cheaply in a rather sorry state. Been working on this thing slowly hunting down broken traces and a dead CPU, but I've now found 2 dead pins of PRO-B0, and that horrible glitching when the slot board is connected.

My parts are primarily for later MVS systems and I don't know where to get a spare without killing another, more easily fixed MVS. If anyone here has a known working PRO-B0, or know what causes that particular kind of glitched screen (it's not calendar related I already checked) it'd help a lot.