The Dragon 200 is functionally and technically the same as the Dragon 64. The difference is purely cosmetic. The Dragon computer was now owned by Eurohard, and the company decided to change the branding and the look of the Dragon line. The Dragon 200 was very popular in Spain and widely used for educational purposes.

OS-9 was a real-time, multi-user, multitasking operating system developed by Microware for Motorola 6809-based machines in the early 1980s. It was designed with modularity in mind: core functions like process management, device drivers, and file managers were structured as separately loadable modules. This meant that OS-9 could be easily adapted to a wide variety of hardware configurations, and could run in environments with very limited memory. Its architecture made it suitable not only for home computers, but also for embedded systems and industrial controllers, where deterministic response and efficient use of hardware resources were crucial.

On the Dragon 64 (and compatible Dragon 32 systems with RAM upgrades), OS-9 Level One provided a Unix-like environment within the constraints of a 64 KB address space. It supported hierarchical directories, process scheduling, and a command-line shell, features rarely seen on 8-bit home computers at that time. Unlike the single-tasking BASIC ROMs most users were familiar with, OS-9 allowed multiple processes to run concurrently, enabling tasks like background printing while editing a document. The Dragon implementation relied on the 6809’s relatively advanced instruction set and efficient interrupt handling, making it possible to deliver true multitasking in a very constrained environment.

Although its user base on the Dragon was small compared to more consumer-friendly environments like DragonDOS or Extended Color BASIC, OS-9 appealed to advanced users and developers who valued its Unix-like design and flexibility. It became a development platform for higher-level languages such as C, and for utilities that benefitted from pre-emptive multitasking. The Dragon’s OS-9 port also helped demonstrate the 6809’s capabilities, as the processor was widely regarded as one of the most sophisticated 8-bit CPUs of its era. OS-9 would later evolve into Level Two for 6809 and 68000 machines, maintaining continuity between small hobbyist systems like the Dragon and larger professional workstations.

The MC6847 is a video display generator (VDG) first introduced by Motorola and used in the following machines (this is not a full list):

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.