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hashmash | 3 months ago

It wouldn't have happened because the 6809 wasn't binary compatible with the 6800.

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djmips|3 months ago

The 6809 was SOURCE compatible with the 6800 - you can assemble 6800 code on a 6809 assembler and it will run with perhaps very minor tweaks.

jacquesm|3 months ago

So?

hashmash|3 months ago

Because none of the existing software would work. The idea of running a Rosetta-like feature on an 8-bit CPU isn't feasible. The Apple II eventually received an upgraded processor, the 65816, which was compatible with the 6502.