Questions tagged [6800]

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…

I need a code listing for 6802 (or 6809) to initialize and set the 6850 ACIA into bidirectional serial I/O mode. I have two vintage boards and need to get the ports working and connected before I can do anything with them. The relevant Motorola App…

Does anyone have a quick primer to the way the 6800's compare-and-branch instructions worked internally? I'm referring to the instructions like BLS that compared a value in memory to the accumulator. I guess that it automated the process of doing an…