RP2A03

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Ricoh 2A03 CPU for Famicom & NES systems. Contains a modified 6502 CPU core.

        +-----+--+-----+
AUDIO 1 |1           40| Vcc
AUDIO 2 |2           39| OUT0
 /RESET |3           38| OUT1
     A0 |4           37| OUT2
     A1 |5           36| /INP 0
     A2 |6           35| /INP 1
     A3 |7           34| R / /W
     A4 |8           33| /NMI
     A5 |9           32| /IRQ
     A6 |10          31| Φ2
     A7 |11   2A03   30| /IOE (IO ports disabled when high)
     A8 |12          29| CLK
     A9 |13          28| D0
    A10 |14          27| D1
    A11 |15          26| D2
    A12 |16          25| D3
    A13 |17          24| D4
    A14 |18          23| D5
    A15 |19          22| D6
    GND |20          21| D7
        +--------------+