Vision BASIC is a high‑performance BASIC compiler for the Commodore 64 that also functions as an integrated assembler, letting you mix BASIC and machine‑language instructions directly in the source. It adds extensive graphics, sound, and sprite commands, supports user‑defined subroutines, and runs without expanded memory after compilation, though it requires at least 256 KB of REU/GeoRAM/SuperCPU RAM for development.

• https://visionbasic.net/