Key repetition routine

[fredrikr]

It would be nice to have a ROM routine for turning key repetition on/off, and maybe read current status.

Turning on key repetition should be doable by sending command $f3 to the keyboard.

[djehuti]

My comment from that one:

IIUC (from a Discord thread) the key repeat can be controlled by sending commands to the SMC.
It would be nice for the user to be able to adjust key repeat on/off, rate, etc., from the system without writing code.

This could take the form of a BASIC extension command, or a system menu preference to go in nvram like the keyboard mapping (my favorite option), and/or a program that loads from disk but is distributed on the sd card.

If I get time, I'll try to contribute it.

[mooinglemur]

Closed via #316 and #317
Docs via X16Community/x16-docs#177 and X16Community/x16-docs#178

[mooinglemur]

Option is in the MENU, can be saved to NVRAM. It isn't included in the AUTOBOOT.X16 export though.