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The NASA Standard Spacecraft Computer-1 (NSSC-1) was a computer developed as a standard component for the MultiMission Modular Spacecraft at the Goddard Space Flight Center (GSFC) in 1974. The basic spacecraft was built of standardized components and modules, for cost reduction. The computer had 18 bits of core memory or plated wire memory; up to 64 k. 18 bits was chosen because it gave more accuracy (x4) for data over a 16 bit machine. Floating point was not supported. == Usage == The NSSC-1 was used on the * Solar Maximum Mission * Space Telescope * Landsat-D Missions and other missions that were mostly limited to the solar system. The hardware was developed by Westinghouse and GSFC. The machine used diode-transistor logic, the lowest power parts available at the time on the preferred parts list; initially fabricated from 1700 SSI (NOR gate) packages, it was later moved to 69 MSI (medium-scale integration) chips. 〔 Trevathan, Charles E., Taylor, Thomas D., Hartenstein, Raymond G., Merwarth, Ann C., and Stewart, William N. "Development and Application of NASA’s First Standard Spacecraft Computer," CACM V27 n9, Sept 1984, pp. 902–913 〕 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「NSSC-1」の詳細全文を読む スポンサード リンク
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