Laser RF Amp Circuit (NEC PC Engine Duo) Updated Apr 18, 2026 · 16 min read · Support · 0 viewing 🔥 Most active page right now Log in or register to read the full article. Previous Laser Tuning (NEC 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 (NEC PC Engine Duo) The save states are stored in internal volatile memory, that is kept alive via a capacitor. If you g...