According to Wikipedia, The Motorola 6800 was released in 1974. Between that and the release of the 6809 in 1979 (or 1978?) there was at least one other 6800-series CPU released, the 6802 microcontroller with the same registers and instruction set as the 6800. The 6801/6803 microcontrollers, which added some additional instructions, were apparently released in 1978 or 1979, but I don't know if this was before or after the 6809.
I'd like a list of all 6800-like processors and microcontrollers released by Motorola up to the time the 6809 became available for purchase in non-sample quantities, along with notes on programming model changes (such as additional instructions or registers). I don't need details about changes, on-chip or not, that are not directly part of the CPU, such as on-board memory or I/O.
I'm mainly interested in availability dates, by which I mean the date any random person or company could walk in off the street and buy them in quantities of a thousand or more. But feel free to provide announcement dates, too, so long as the announcement covers the final details of the processor programming model.