I really should have know that regarding the TRS-80 and Dragon 32, but the Dragon computers were not that great and didn't sell too well so I was never really that interested in them at the time.
Reading on Wikipedia it states that both systems were based on a Motorola data sheet design, so instead of being one based on the other, they were more both based on a common computer design. Bit of a shame it wasn't a better common design.
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