MVS to AES adapter
NEO TEAM Super MVS Convertor II V5B
Uses a PAL18CV8 and two LS245 transceivers for the prog board. Two corresponding footprints for SIL pull-up resistors on the MVS side are left unpopulated.
Uses a custom chip "NEO CELL KS300 8436020333002 06-03" to simulate NEO-ZMC2. An RC circuit (potentiometer) is used for CLK delay to make CMC games work correctly.
According to [these pictures], the chip would be a custom branded Altera MAX PLD. It's in fact en EPM240D and the header on the back is for JTAG.