Input devices: Difference between revisions

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m (Add relinks for the last peripherals. As far as I can tell, all the other devices mentioned in bootgod's db just function identically to one of the other peripherals.)
m (skip redirect)
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* [[Family basic keyboard]]
* [[Family basic keyboard]]
* [[Four score]]
* [[Four score]]
* [[Power pad]]
* [[Power Pad]]
* [[Standard controller]]
* [[Standard controller]]
* [[Zapper]]
* [[Zapper]]

Revision as of 18:35, 23 August 2012

The NES and Famicom have a set of I/O ports used for controllers and other peripherals, consisting of the following:

  • One output port, 3 bits wide, accessible by writing the bottom 3 bits of $4016.
  • Two input ports, each 5 bits wide, accessible by reading the bottom 5 bits of $4016 and $4017.

The NES has two general-purpose controller ports on the front of the console, as well as a (rarely used) 48-pin expansion port underneath.

The Famicom's standard controllers are hardwired to the front of the unit, and a special 15-pin expansion port is commonly used for third-party controllers. The AV Famicom, however, features detachable controllers using the same ports as the NES.


Programmer's reference

Hardware

Other I/O devices