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IBM 3780 : ウィキペディア英語版
IBM 2780/3780
The IBM 2780〔(picture of an IBM 2780 )〕 and the IBM 3780〔(picture of an IBM 3780 )〕 were devices developed by IBM to perform Remote Job Entry (RJE) functions. They communicated with the mainframe via Binary Synchronous Communications (BSC or Bisync).
==2780==
The 2780, first shipped in 1967,〔(【引用サイトリンク】title=Rochester chronology )〕 came in four models. The Model 1 could read punched cards and transmit the data to a remote host computer, and receive and print data sent by the host. The Model 2 added the ability to punch card data received from the host, The Model 3 could only print data received from the host, but not send data. The model 4 could read and punch card data, but had no printing capabilities.
The 2780 used a dedicated communication line at speeds of 1200, 2000, 2400 or 4800 bits per second. It was a half duplex device, although full duplex lines might be used with some increase of thruput. It could communicate in ''Transcode'' (a 6-bit code), 8-bit ''EBCDIC'', or 7-bit ''ASCII''.
The card reader/punch unit, similar to an IBM 1442, could read up to 400 cards per minute(cpm) and punch up to 355 cpm. The 2780 line printer was similar to the IBM 1443〔(IBM 1443 printer description )〕 and could print up to 240 lines per minute (lpm), or 300 using an extremely restricted character set. The 2780 was capable of local (offline) card to print operation.

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「IBM 2780/3780」の詳細全文を読む



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