UART bootloader for STM32 microcontroller.
Raspberry Pi Pico DIP-EEPROM Programmer
Kermit 95 (C-Kermit for Windows and OS/2) - scriptable internet and serial communications with terminal emulation
XMODEM with binary mode and 1K option and a sample YMODEM implementation.
C code for a simple state-machine based XModem implementation
EEPROM Programmer for Arduino Nano without needing other components
Arduino XYMODEM file transfer protocol
An Arduino Nano sketch and schematic for an Atmel 28cx programmer.
ARCHIVED: Transfer disk images off Commodore 64 over RS-232 via XMODEM