Editing MOS Technology 6510 (section)

=== MOS 7501/8501 {{anchor|7501|8501}} ===
[[File:MOS8501R1.jpg|thumb|MOS 8501 CPU]]
The '''7501/8501''' variant of the 6510 was introduced in 1984.<ref name="auto">[http://plus4world.powweb.com/hardware/MOS_75018501 Hardware – MOS 7501/8501]</ref> Compared to the 6510, this variant extends the number of I/O port pins from 6 to 8, but omits the pins for non-maskable interrupt and clock output.<ref>[https://ist.uwaterloo.ca/~schepers/MJK/7501.html  CPU 7501 / 8501]</ref>   It is used in Commodore's [[Commodore 16|C16]], [[Commodore 16|C116]] and [[Commodore Plus/4|Plus/4]] home computers, where its I/O port controls not only the [[Commodore Datasette|Datasette]] but also the [[Commodore 1541#Interface|CBM Bus]] interface. The main difference between 7501 and 8501 CPUs is that they were manufactured with slightly different processes: 7501 was manufactured with [[HMOS|HMOS-1]] and 8501 with HMOS-2.<ref name="auto"/>