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The MOS Technology 6510, also known as MOS Technology / Commodore Semiconductor Group (CSG) 8500, is a microprocessor designed by MOS Technology, and is a direct successor of the very successful 6502.
The primary changes from the 6502 were the addition of clock pins, which allowed the chip to use external clocks, and the addition of I/O ports which allowed the CPU to handle simple tasks without needing the 6522 VIA. The 6510 was only widely used in the Commodore 64 home computer (and in significantly smaller numbers in the C64's portable version, the SX-64). In the C64 and SX-64 machines, the extra pins on the processor were used for switching in and out memory banks, and in the C64 for controlling the electric motor of the cassette recorder.
In 1985 MOS produced the 8500, a HMOS version of the 6510.
Variants
The 7501/8501 variant of the 6510 was used in the Commodore C16, C116 and plus/4 home computers, and the 8502 variant was used in the Commodore C128. All these CPUs are opcode compatible (including illegal opcodes).
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