Microchip does not prominently list old versions on their main download page. However, they maintain a legacy archive. Follow these steps precisely:
Access the Downloads Archive
Locate v2.05
Download the Free Version
If you do not use MPLAB X IDE (e.g., you prefer VS Code or plain Makefiles), the XC8 compiler works perfectly from the command line. After installation, create a simple build script: mplab xc8 compiler v2 05 download free
# Build example for PIC16F877A
xc8 --chip=16F877A main.c --output=coff --summary=psect,mem
To compile with free-mode optimizations (level 1):
xc8 --chip=16F877A --opt=1 main.c -o firmware.hex
This is ideal for integrating into CI/CD pipelines or custom embedded workflows. Microchip does not prominently list old versions on
MPLAB X v6.00+ dropped direct support for XC8 v2.05 due to a change from gcc to clang backend. Solution: Use MPLAB X v5.35 (available in the archive) with XC8 v2.05. Do not try to force v2.05 into v6.x.