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The '''Motorola 6809''' is an 8-bit microprocessor introduced in 1978. | The '''Motorola 6809''' is an 8-bit microprocessor introduced in 1978. | ||
The 6809 compatible to its predecessor | The 6809 is only compatible to its predecessor (the [[Motorola 6800]]) on assembler source level, not in binary programs nor electrically. | ||
Improvements over the 6800 allow position-independent and re-entrant code, 16-bit arithmetic, a hardware multiplication instruction, and a fast interrupt system. | Improvements over the 6800 allow position-independent and re-entrant code, 16-bit arithmetic, a hardware multiplication instruction, and a fast interrupt system. |