All the wiring is fortunately very easy. In the earlier boards, you are working with DIP chips (74HC273s and one 74LS06). The only "tricky" wires are the
digital CSYNC signal (before it is brought to the JAMMA edge) and the 12MHz clock (easiest to take from CPU).
Xian Xi, and anyone else familiar with the MVS/AES system boards - if you can help me locate these signals on different Neo-Geo boards, it would be great so I can make diagrams for where to find them on all of them. So far I've found it on MV-1C and my MV-1FZ at home. I have an MV-4F I can play with too. I need these mapped out:
Red 0-4 (Near edge '273s)
Green 0-4 (Near edge '273s)
Blue 0-4 (Near edge '273s)
Blanking (Near edge '273s - the /CLEAR pin)
/DAK (one of the inputs to the 74LS06)
/SHAD (one of the inputs to the 74LS06)
CSYNC (I found it on one trace going towards the JAMMA edge)
12MHz clock (I pulled it form the 68000)
Those are all of the signals needed for NeoVGA (and for the HDMI project, mind you).
I've fixed a few mistakes, added more caps, and some grounding. I also changed the hatch pattern and added a shiny rim to make the board dead sexy. Here's Rev. 2.0: