Main Page | See live article | Alphabetical index The 6501 is an eight-bit microprocessor, the first sold by MOS Technologies. The 6501 is pin-compatible with the Motorola 6800 and is the first member of the 650x series of microprocessors. The 6502 is a 6501 with the pins re-arranged following a lawsuit by Motorola over the 6501's pin arrangement. The 6502 also added a two-phase clock generator, so it only needed a single phase clock input, simplifying system design. See the 6502 article for further details. This article (or an earlier version of it) contains or contained material from FOLDOC, used with permission. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.