Editing Microprocessor (section)

====Texas Instruments TMS 1802NC (1971)====
The TMS1802NC, announced September 17, 1971, was the first microcontroller and at launch implemented a four-function calculator. The TMS1802NC, despite its designation, was not part of the [[TMS 1000]] series; it was later redesignated as part of the TMS 0100 series, which was used in the TI Datamath calculator. It was marketed as a calculator-on-a-chip and also "fully programmable", but this programming had to done during manufacturing. Its chip integrated a CPU with an 11-bit instruction word, 3520 bits (320 instructions) of ROM and 182 bits of RAM.<ref name="genie" /><ref>U.S. Patent no. 4,074,351 (TMS1802NC.)</ref><ref name="shirriff" /><ref>[https://web.archive.org/web/20060218021723/http://www.ti.com/corp/docs/company/history/calcchip.shtml "STANDARD CALCULATOR ON A CHIP ANNOUNCED BY TEXAS INSTRUMENTS"], press release. TI, Sep. 19, 1971.  Originally on ti.com but now archived at archive.org.</ref>