The Hitachi MB-6891 has an upgraded version of Basic master Level 3 which corrects some of the misses of Level 2 basic such as graphics and the inclusion of the Kanji character set.

The MB-6891 was released in 1982 and was designed for hobbyists and educational purposes. It was based on the Motorola 6809E microprocessor. The computer had 48KByte of RAM and 16KByte of VRAM and 24KByte of ROM, it featured integrated sound and graphics capabilities. It also had expansion slots which allowed users to add peripherals.

The Motorola 6809 is an 8-bit microprocessor with some 16-bit features. It was designed by Motorola's Terry Ritter and Joel Boney and introduced in 1978. Although source compatible with the earlier Motorola 6800, the 6809 offered significant improvements over it and 8-bit contemporaries like the MOS Technology 6502, including a hardware multiplication instruction, 16-bit arithmetic, system and user stack registers allowing re-entrant code, improved interrupts, position-independent code and an orthogonal instruction set architecture with a comprehensive set of addressing modes.