# NOTICE — bcpr

SER12 bitbang, soft-DCD PLL, and HDLC framing algorithms are derived from
Linux kernel sources `baycom_ser_fdx.c` and `hdlcdrv.c` (Thomas Sailer et al.),
Linux LTS v6.1.177, SPDX GPL-2.0-or-later.

This userspace port is part of MAX25-Stack (GPL-3.0) and does **not** ship or
maintain the in-tree `baycom_ser_fdx` kernel module as a product path.

Upstream reference (plain files):
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/