grbl for Arduino Uno / Nano (Atmega328)
-------------------------------------------
All made from latest https://github.com/gnea/grbl (2019 = original)
with changes for servo-support from https://github.com/cprezzi/grbl-servo (config.h, cpu_map.h, spindle_control.c)
and servo-off position.

Pin-swap needed for Arduino-Nano CNC-shield V4 with bug

Compiled, using following options:
Config.	Options
A	original
B	original and servo
C	original and servo and servo-off inverted
D
E	pin-swap
F	pin-swap and servo
G	pin-swap and servo and servo-off inverted
H
I	COREXY
J	COREXY and servo
K	COREXY and servo and servo-off inverted

Send $I to read out uploaded version, rsponse like:
[VER:1.1h.G_240107:]
          ^
       Config G


grbl for Arduino Mega2560
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grbl-Mega-5X-v1.2d.20211118.hex
from https://github.com/fra589/grbl-Mega-5X

grbl-Mega-5X-v1.1p.20201228_end_stops.hex
compiled with hard-limits by 78Matteo78 