NES expansion port pinout: Difference between revisions
From NESdev Wiki
Jump to navigationJump to search
m (pre tags are unnecessary and undesired!) |
(→Pinout of 48-pin NES expansion port: add direction arrows and some caveats) |
||
| Line 1: | Line 1: | ||
==Pinout of 48-pin NES expansion port== | ==Pinout of 48-pin NES expansion port== | ||
+-------\ | |||
+5V |01 48| +5V | +5V -- |01 48| -- +5V | ||
Gnd |02 47| Gnd | Gnd -- |02 47| -- Gnd | ||
Audio in |03 46| NC | Audio in -> |03 46| -- NC | ||
/NMI |04 45| out 2 ($4016 write data, bit 2) | /NMI <- |04 45| -> out 2 ($4016 write data, bit 2) | ||
A15 |05 44| out 1 ($4016 write data, bit 1) | A15 <- |05 44| -> out 1 ($4016 write data, bit 1) | ||
EXP9 |06 43| out 0 ($4016 write data, bit 0, strobe on sticks) | EXP9 ?? |06 43| -> out 0 ($4016 write data, bit 0, strobe on sticks) | ||
EXP8 |07 42| EXP0 | EXP8 ?? |07 42| ?? EXP0 | ||
EXP7 |08 41| EXP1 | EXP7 ?? |08 41| ?? EXP1 | ||
EXP6 |09 40| EXP2 | EXP6 ?? |09 40| ?? EXP2 | ||
EXP5 |10 39| EXP3 | EXP5 ?? |10 39| ?? EXP3 | ||
($4017 read strobe) /OE for joypad 2 |11 38| EXP4 | ($4017 read strobe) /OE for joypad 2 <- |11 38| ?? EXP4 | ||
joypad 1 D1 |12 37| /OE for joypad 1 ($4016 read strobe) | joypad 1 D1 -> |12 37| -> /OE for joypad 1 ($4016 read strobe) | ||
joypad 1 D3 |13 36| joypad 1 D4 (before inverting buffer) | joypad 1 D3 xx |13 36| xx joypad 1 D4 (before inverting buffer) | ||
/IRQ |14 35| joypad 1 D0 (likewise) | /IRQ <> |14 35| xx joypad 1 D0 (likewise) | ||
joypad 2 D2 |15 34| duplicate of pin 37 | joypad 2 D2 -> |15 34| -> duplicate of pin 37 | ||
joypad 2 D3 |16 33| joypad 1 D2 | joypad 2 D3 xx |16 33| <- joypad 1 D2 | ||
duplicate of pin 11 |17 32| CPU D0 | duplicate of pin 11 <- |17 32| <> CPU D0 | ||
joypad 2 D4 |18 31| CPU D1 | joypad 2 D4 xx |18 31| <> CPU D1 | ||
joypad 2 D0 |19 30| CPU D2 | joypad 2 D0 xx |19 30| <> CPU D2 | ||
joypad 2 D1 |20 29| CPU D3 | joypad 2 D1 -> |20 29| <> CPU D3 | ||
Video out |21 28| CPU D4 | Video out <- |21 28| <> CPU D4 | ||
Audio 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 | ||
+-------/ | |||
===Extra notes=== | |||
* See [[Cartridge connector#Signal descriptions]] for notes about the ten EXP pins | |||
* /NMI is an output because the PPU uses a push-pull driver, not open-drain signalling | |||
* Joypad 1 and 2 D0, D3, and D4 are available as an input if no peripheral is connected to the corresponding joystick port that uses those bits: | |||
** e.g. D0 is unavailable if e.g. a [[Standard controller]] or [[Four score]] is plugged in, and | |||
** D3 and D4 are unavailable if a [[Zapper]], [[Arkanoid controller]], or [[Power Pad]] is plugged in. | |||
[[Category:Pinouts]] | [[Category:Pinouts]] | ||
Revision as of 19:54, 15 July 2016
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 xx |13 36| xx joypad 1 D4 (before inverting buffer)
/IRQ <> |14 35| xx joypad 1 D0 (likewise)
joypad 2 D2 -> |15 34| -> duplicate of pin 37
joypad 2 D3 xx |16 33| <- joypad 1 D2
duplicate of pin 11 <- |17 32| <> CPU D0
joypad 2 D4 xx |18 31| <> CPU D1
joypad 2 D0 xx |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
+-------/
Extra notes
- See Cartridge connector#Signal descriptions for notes about the ten EXP pins
- /NMI is an output because the PPU uses a push-pull driver, not open-drain signalling
- Joypad 1 and 2 D0, D3, and D4 are available as an input if no peripheral is connected to the corresponding joystick port that uses those bits:
- e.g. D0 is unavailable if e.g. a Standard controller or Four score is plugged in, and
- D3 and D4 are unavailable if a Zapper, Arkanoid controller, or Power Pad is plugged in.
