6809 was Motorola.<p>MOS took engineers from Motorola who made the 6800 chip, cloned it and MOS 6501 was pin compatible with the 6800 and the 6502 changed two pins. Motorola sued and won over the 6501 but not the 6502.<p>The 6809 was a 16 bit chip IIRC. TRS-80 COCO used it. It was the original chip to be used on the $600 Macintosh project until Steve Jobs took it over and changed it to the 68000 CPU.<p>6800 cost $300 and 6502 cost $30, guess which ones the 8 bit video game consoles and computers wanted to use?