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I don't think that viewing a microprocessor as a "component in a control circuit first, a computer second" (or vice versa) makes any difference to this question. E.g., zero-page (8-bit) addressing as an adjunct to absolute (16-bit) doesn't depend at all on whether the CPU is being used to control an car or as a general purpose computer.
– cjs
Commented Apr 28 at 3:33
It would be worth extending your answer to discuss the bus compatibilities between the 6502 and the 6800. The 6502 wasn't pin-for-pin compatible, but the bus and control structure was essentially the same, was it not? Could you, with an adapter, switch a 6800 system to a 6502, or vice versa? And what would be the details of that? (Looking at the Apple 1 may help you with this.)
– cjs
Commented Apr 28 at 3:36

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