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After getting into a dispute at Commodore, Jack left and purchased ailing Atari from Warner Communications. By this time the industry moved on from MOS 6502 processor to the 16/32-bit Motorola 68000.
The Atari 520ST was also known as the "Jackintosh" due to its graphical user interface. It used the Motorola 68000 and competed against Apple's Macintosh and Commodore's Amiga computers.