Production-ready patterns for Commodore 64 development
Read joystick input from CIA#1 for player control. Simple, reliable, and cycle-efficient.
Play a single note on the SID chip with gate control. The foundation of all SID audio.
Configure a SID voice with frequency, waveform, and ADSR envelope. Foundation for all SID audio programming.
Move sprites with joystick input and screen boundary clamping. Handle the VIC-II's 9-bit X coordinate.
Simple frame-synchronised game loop using the raster register. Foundation for all C64 games.