GCBASIC documentation
Compiler Preprocessor Options

Syntax:

    #option NoConfig

This option will prevent the generated assembler from generating config items.

#option NoConfig is used when using a bootloader.

Example:

    'Set chip model
    #chip 16f877a

    'Example command
    #option NoConfig          ' <<< suppressing all compiler-generated config statements

    'User Code......

Key line: #option NoConfig — with this option set, none of GCBASIC’s usual automatic CONFIG-word settings (oscillator mode, watchdog timer, MCLR, etc. - see Configuration) are written into the generated ASM; this is required when a bootloader has already configured those bits and must not have them overwritten.