MOS 7501
MOS 7501 microprocessor technical specifications
Developed by: MOS Technology
Launched: 1984
ALU bits: 8
It was a variant of the MOS 6510 introduced in 1984.
It expanded the number of I/O port pins from 6 to 8, but omitted the pins for the non-maskable interrupt and the clock output.
It was used in Commodore's C16, C116, and Plus/4 home computers.
A variant called the MOS 8501 later appeared, with improved manufacturing technology that allowed for higher clock speeds.