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The SM-4 (CM-4) was a Polish PDP-11/40 computer clone, in the second half of the 1980s. It was very popular in science and technology. The standard configuration included 128 or 256 KB core memory, tape puncher, two RK-05 removable 2.5 MB disks and two RK-05F fixed disks, two TU-10 drives and Videoton VDT-340 terminals (VT52 non-compatible). The SM-series also included the SM-3, without floating point processing, similar to DEC's PDP 11/40 and 11/34 models. In early production, ferrite core memory was used. Operating systems commonly used, included: * RT-11 (Rafos after partial translation) * RSTS/E * RSX-11 * DSM-11 (DIAMS after partial translations) * DEMOS and MNOS Similar models included the SM-1420, with semiconductor memory, and the SM-1600, a hybrid of the SM-1420 and the M-6000(?), a system produced in Minsk. The main producer was a Kiev-based factory in Ukraine. ==See also== * SM EVM * List of Soviet computer systems 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「SM-4」の詳細全文を読む スポンサード リンク
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