Default horizontal and vertical screen offsets are adjusted to center the image on European TV sets.
Technical Overview: The Commodore VIC-20 (Europe) BIOS The "BIOS" for the refers to the set of Kernal and character ROMs specifically designed for the PAL (Phase Alternating Line) television standard used in Europe. Unlike modern PCs, the VIC-20’s operating system and programming environment (BASIC) were hard-coded into physical Read-Only Memory (ROM) chips. Core ROM Components Download [BIOS] Commodore VIC-20 (Europe)
Most downloads provide these as .bin or .rom files, often named by their Commodore part numbers (e.g., 901486-07.bin ). Default horizontal and vertical screen offsets are adjusted