Irem M84 partial schematics

I’ve started drawing out Irem’s M84 hardware. I’m using an R-Type II PCB so the ROM names are specific but the overall layout and functionality should be the same across the games.
I used the M81 schematics I made as the base as the hardware is very similar.

This will be updated as I get around to it or until I no longer need to carry on with it.
Available in the ‘Downloads/Schematics’ section.