Ok, after sorting this out and she is now running as she should ( just the cabinet to sort out which is nearly finished), i thought i would have a go at doing a full schematic for the MPU1 seeing as there does not appear to be one around.
I will make my excuses now........
It`s not perfect, it has probably aged my eye sight by trying to backwards engineer a pcb to a schematic ( thank god it is 70s tech and not triple layer).
MISTAKES THERE WILL BE so if anyone notices any let me know and i will check and correct them.
It is a big file, it ended up on A2 size and i still ran out of space (appologies for having to cram the rom cartridge in).
But it is a start and all being well we can crack it from here.
REV2 Bitmap further down thread.