Laser RF Amp Circuit (PC Engine Duo) Updated Mar 15, 2026 · 16 min read · Support · 0 viewing 🔥 Most active page right now Log in or register to read the full article. Previous Laser Tuning (PC Engine Duo) The PC Engine Duo can be tuned with many potentiometers. Setting them strategically and in order i... Next 📄 Internal Memory Backup RAM (PC Engine Duo) The save states are stored in internal volatile memory, that is kept alive via a capacitor. If you g...