NES expansion port pinout: Difference between revisions

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m (→‎Pinout of 48-pin NES expansion port: fixed pin 4, since wookie pointed this out in the forum a year ago)
m (→‎Pinout of 48-pin NES expansion port: Fixed pinout per http://nesdev.parodius.com/bbs/viewtopic.php?p=83456#83456 (sorry, beat you to it))
Line 22: Line 22:
                           joypad 2 D0 |19  30| CPU D2
                           joypad 2 D0 |19  30| CPU D2
                           joypad 2 D1 |20  29| CPU D3
                           joypad 2 D1 |20  29| CPU D3
                             Audio out |21  28| CPU D4
                             Video out |21  28| CPU D4
                             Video out |22  27| CPU D5
                             Audio out |22  27| CPU D5
         unregulated power adapter vdd |23  26| CPU D6
         unregulated power adapter vdd |23  26| CPU D6
                       4.00MHz CIC CLK |24  25| CPU D7
                       4.00MHz CIC CLK |24  25| CPU D7
                                       +-------/
                                       +-------/

Revision as of 17:12, 7 September 2011

Pinout of 48-pin NES expansion port

                                     +-------\
                                 +5V |01   48| +5V
                                 Gnd |02   47| Gnd
                            Audio in |03   46| NC
                                /NMI |04   45| out 2 ($4016 write data, bit 2)
                                 A15 |05   44| out 1 ($4016 write data, bit 1)
                                EXP9 |06   43| out 0 ($4016 write data, bit 0, strobe on sticks)
                                EXP8 |07   42| EXP0
                                EXP7 |08   41| EXP1
                                EXP6 |09   40| EXP2
                                EXP5 |10   39| EXP3
($4017 read strobe) /OE for joypad 2 |11   38| EXP4
                         joypad 1 D1 |12   37| /OE for joypad 1 ($4016 read strobe)
                         joypad 1 D3 |13   36| joypad 1 D4 (before inverting buffer)
                                /IRQ |14   35| joypad 1 D0 (likewise)
                         joypad 2 D2 |15   34| duplicate of pin 37
                         joypad 2 D3 |16   33| joypad 1 D2
                 duplicate of pin 11 |17   32| CPU D0
                         joypad 2 D4 |18   31| CPU D1
                         joypad 2 D0 |19   30| CPU D2
                         joypad 2 D1 |20   29| CPU D3
                           Video out |21   28| CPU D4
                           Audio out |22   27| CPU D5
       unregulated power adapter vdd |23   26| CPU D6
                     4.00MHz CIC CLK |24   25| CPU D7
                                     +-------/