Con1 is the main box connector which is subdivided into 4 separate connectors marked A-D on the board.
Con2 and 3 look like unpopulated programming ports, such as JTAG for the micro and something with a bunch of pins for an eeprom.
Also some little bitty 3- and 4-pins for Con4 and Con5, likely for some sort of program or testing power supplies.
IC1 has mitsubishi logo and is marked MH8106F 115A105 U0.
IC2 has a big mits logo and is marked E350B SC111528BAF M66E 263 QDE1124D.
Anybody interested feel free to jump in and bite off a slice--ain't gonna be easy but a whole lotta fun...
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