The current and fourth official release of DiscoBSD is DiscoBSD 2.3, released on August 11, 2024.
This microcontroller-focused operating system is an independent continuation of
RetroBSD,
a 2.11BSD-based OS targeting only the MIPS-based PIC32MX7.
DiscoBSD is multi-platform, as it also supports Arm Cortex-M4 STM32F4 devices.
Source code to the system is freely available under a BSD-like license.