1.4.3 Operating Modes

The C65 powers up in the C64 mode. if there are no conditions present which indicate that C64 mode is desired, such as the C= key depressed or a C64 cartridge signature found, then C65 mode will be automatically brought into context. Unlike the C128, "C64 mode" is escapable. Like the C128, all of the extended features of the C65 System are accessible from "C64 mode" via custom software. Whenever the system initiates C64 mode, new VIC mode is always disabled except when the DOS is required.