A moderated community dedicated to all things reverse engineering.
C and ASM kernel hijack:
https://gitlab.com/UrsusArcTech/psx-kernel-module-hijack/-/tree/6_byte_request_header?ref_type=heads
Mario 64 USB comms in C:
https://github.com/Carl-Llewellyn/sm64_n64x_usb
Pi Pico firmware in C: