BMC64 is a C64 emulator optimized for the Raspberry Pi 3. It offers smooth scrolling, low latency, and other features that make it perfect for creating your own C64 replica machine. The latest version, v3.9-stable, includes the addition of REU to the cartridge menu. It has a quick boot time of 4.1 seconds, supports real joysticks and a keyboard, and allows for embedding a Pi inside a C64 shell. The emulator can be installed by formatting an SD card or flashing an image. ROM files are required for the emulator to run. Various latency measurements are provided comparing the emulator to other systems.
https://accentual.com/bmc64/