ps2x2pico Version 2.1

This is version 2.1 running all devices in report mode and compiled with Pico-SDK 1.5.1 and TinyUSB 0.17.0.
This should fix #66 keyboards with QMK firmware and NKRO support.
Thanks @zoushiyin and @nvllsvm for reporting and testing!

ps2x2pico.uf2 uses the mouse rate set by the host PC
ps2x2pico-100hz.uf2 uses fixed 100 Hz mouse rate, ignores host request
ps2x2pico-200hz.uf2 uses fixed 200 Hz mouse rate, ignores host request

ps2x2pico Version 2.0

This is version 2.0 running all devices in report mode and compiled with Pico-SDK 1.5.1.
This should fix #35, #50, #59 and #61, please test multiple different mice.
Also #40 became active again since all devices now run in report mode and NKRO is implemented (for USB keyboards that support NKRO).

ps2x2pico.uf2 uses the mouse rate set by the host PC
ps2x2pico-100hz.uf2 uses fixed 100 Hz mouse rate, ignores host request
ps2x2pico-200hz.uf2 uses fixed 200 Hz mouse rate, ignores host request

ps2x2pico Version 1.2

Thanks to @seritools for debugging the AMI keyboard controller on 386 boards.

ps2x2pico.uf2 uses the mouse rate set by the host PC
ps2x2pico-100hz.uf2 uses fixed 100 Hz mouse rate, ignores host request
ps2x2pico-200hz.uf2 uses fixed 200 Hz mouse rate, ignores host request

ps2x2pico Version 1.1

Thanks to @bstrobel for adding support for Silicon Graphics Workstations.
Thanks to @ssokolow for debugging holding down keys while rebooting to enter BIOS setups.

ps2x2pico.uf2 uses the mouse rate set by the host PC
ps2x2pico-100hz.uf2 uses fixed 100 Hz mouse rate, ignores host request
ps2x2pico-200hz.uf2 uses fixed 200 Hz mouse rate, ignores host request

ps2x2pico Version 1.0

Thanks to everyone for helping, debugging and testing!

ps2x2pico.uf2 uses the mouse rate set by the host PC
ps2x2pico-100hz.uf2 uses fixed 100 Hz mouse rate, ignores host request
ps2x2pico-200hz.uf2 uses fixed 200 Hz mouse rate, ignores host request

Beta-0.9

This fixes two bugs regarding ghost mouse movement and key presses mentioned here: #19

Still need to implement the mouse decoupling mentioned here: #1 (comment)

PIO version finally working

Backported from PiKVM Pico HID: https://docs.pikvm.org/pico_hid/

Please note that the keyboard and mouse clock/data lines have to be swapped from now on.

HV1 is now keyboard data
HV2 is now keyboard clock
HV3 is now mouse data
HV4 is now mouse clock

more compatible ps2 mouse emulation

Thanks @serisman

Alpha-0.2

Mouse wheel is now working, code still needs massive cleanup!
Instructions: README.md