it looks correct and complete to me, however am not a specialist at this!
it works fine for modbo so it should work fine for matrix i think.
apart from CX point on the diagram of course.
I personally will have to use another diagram since i have a GH-062-02 mobo. which is visually different than the mobo in your diagram...
I really hope the resistor fix is correct, we need conformation from Gradius or D-blood for this to be 100% sure.
*EDIT*
i got this picture from jetcat...
http://psx-scene.com/forums/attachme...7&d=1232813165
post:
http://psx-scene.com/forums/attachme...7&d=1232813165