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- Does that mean only one CPU can be active at the same time? Doesn't the question specifically mention CPUs that could be active at the same time, and so be used by the programmer?dirkt– dirkt2017-01-21 19:48:51 +00:00Commented Jan 21, 2017 at 19:48
- I'm pretty sure that the 6809 used the 6502 as a sort of I/O processor handling the keyboard, screen, IEEE-488 bus etc. I don't recall if you could add custom code to the 6502 workload though.Peter Camilleri– Peter Camilleri2017-01-21 19:52:32 +00:00Commented Jan 21, 2017 at 19:52
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