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The Apollo Guidance Computer (AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo Command Module (CM) and Lunar Module (LM). The AGC provided computation and electronic interfaces for guidance, navigation, and control of the spacecraft.〔http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20090016290_2009014409.pdf Apollo Guidance, Navigation and Control Hardware Overview〕 The AGC had a 16-bit word length, with 15 data bits and one parity bit. Most of the software on the AGC was stored in a special read only memory known as core rope memory, fashioned by weaving wires through magnetic cores, though a small amount of read-write core memory was provided. Astronauts communicated with the AGC using a numeric display and keyboard called the DSKY (DiSplay&KeYboard, pronounced 'DISS-key'). The AGC and its DSKY user interface were developed in the early 1960s for the Apollo program by the MIT Instrumentation Laboratory. The AGC is notable for being one of the first integrated circuit-based computers. ==Operation== Each flight to the Moon (with the exception of Apollo 8, which did not take a Lunar Module on its lunar orbit mission) had two AGCs, one each in the Command Module and the Lunar Module. The AGC in the Command Module was at the center of that spacecraft's guidance, navigation and control (GNC) system. The AGC in the Lunar Module ran its Apollo PGNCS (Primary Guidance, Navigation and Control System), with the acronym pronounced as ''pings''. Each lunar mission had two additional computers: * The Launch Vehicle Digital Computer (LVDC) on the Saturn V booster instrumentation ring * the Abort Guidance System (AGS, acronym pronounced as 'ags') of the Lunar Module, to be used in the event of failure of the LM PGNCS. The AGS could be used to take off from the Moon, and to rendezvous with the Command Module, but not to land. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Apollo Guidance Computer」の詳細全文を読む スポンサード リンク
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