Editing Sun keyboard/mouse interface

[[Sun Microsystems]]' proprietary keyboard/mouse interface was used on SPARCstation workstation and server-class computers for keyboards and mice.

==Devices==
* [[Sun Type 4]] keyboard and mouse
* [[Sun Type 5]] and 5c keyboard and mouse
* [[Sun Compact 1]] keyboard and mouse
* Some [[Sun Type 6]] keyboards and mice: those that don't have [[USB]].

==Connector and cable==
The connector is 8-bit mini-DIN, with different pins used for keyboard and mouse signals.
The mouse connects to a port on the keyboard which passes through the signals to a port on the host.

Some keyboards have a left and a right port, for attaching a mouse on either the left or right side, with the other port for plugging a cable to the host.
Others have a single mouse port on the keyboard and a captive host-cable.

==Keyboard protocol==
The keyboard protocol is specified in SPARC International Keyboards Specification 1. 
It is based on 1200 baud serial with negative logic, asynchronous with no flow control.

The protocol was also used for [[Sun Type 2]] and [[Sun Type 3]] keyboards with other connectors.

===Converters to USB===
Commercial:
* [https://www.drakware.com/shop/p/sun2usb Drakware Sun2USB]
* [https://www.vpi.us/usb-to-ps2-sun/usb-sun-adapter-1535 VPI USB to SUN Adapter]

Open source / DIY:
* '''Hasu''''s [https://github.com/tmk/tmk_keyboard/tree/master/converter/sun_usb TMK]. Uses a ATmega32u2/u4 microcontroller.
* [https://github.com/xelalexv/suniversal xelalexv's '''suniversal''' firmware] for the [[Pro Micro]].
* [http://kentie.net/article/sunmark2/ Sun keyboard to USB converter] version 2 by Brad Minch and Marijn Kentie. Uses a PIC18F2550 microcontroller.

===Converters to PS/2===
Open source:
* Ove Risberg's [http://www.buzzard.me.uk/jonathan/sunkbd.html converter], using a MC68HC11E1 microcontroller.

[[Category:Keyboard protocols and interfaces]]
[[Category:Pointing device protocols and interfaces]]