Professional !!exclusive!! - Codevision Avr 2.05.0
// Global interrupt enable #asm("sei")
While modern Electron-based IDEs consume 2GB of RAM, CodeVision 2.05.0 Professional installs in under 50MB and launches instantly. It has no cloud dependencies, no forced updates, and no telemetry. CodeVision AVR 2.05.0 Professional
He needed the old magic .
// Alias declarations #define LED PORTA.0 no forced updates
From the IDE, click Tools -> CodeWizardAVR . click Tools ->