Editing Varvara (section)

== Devices ==

Devices are external systems connected to the Uxn CPU, such as the screen, the mouse and the keyboard. Each device has 16 bytes, also called ports, of I/O memory. Vectors are ports holding an address in memory to evaluate when a device event is triggered, such as when the mouse is moved, or a key is pressed.

* 00 - System device
* 10 - Console device
* 20 - Screen device
* 30, 40, 50, 60 - Audio device
* 70 - MIDI device
* 80 - Controller
* 90 - Mouse
* a0, b0 - File
* c0 - Datetime
* d0 - Unused
* e0, f0 - Reserved

The two reserved devices can be used for implementation specific features that do not need to be part of the specs, or other Uxn/Varvara instances.