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IBM 5250 was a family of block-oriented terminals originally introduced with the IBM System/34 midrange computer systems in 1977. It also connected to the later System/36, System/38, AS/400, System i, and IBM i running on Power systems. ==Components== 5250 devices could be directly attached to the host or communicate remotely using Synchronous Data Link Control (SDLC) at up to 9600bit/s. Devices could also be clustered or daisy-chained. In 1978 the 5250 system consisted of the following components: * 5251 Display Station. The monochrome text-only display could be either 960 characters, formatted as 12 lines of 80 characters, or 1920 characters as 24 lines of 80 characters. Upper and lower case was standard. Text attributes consisted of blink, high intensity, reverse video, nondisplay, underscore, and a unique ''column separator'' that caused the field to be preceded and followed by a vertical bar. 5251 and 5252 input ''format control'' attributes were optimized for data entry applications and offered significant enhancements over previous 3270 terminals. * 5252 Dual Display Station. The 5252 featured dual CRTs back to back in a single case, with separate keyboards. The 5252 was not part of the initial announcement. * 5256 printer. The 5256 was a tabletop serial dot matrix printer with three models providing speeds of 40, 60, or 120cps and a print line of 132 characters. 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 5250」の詳細全文を読む スポンサード リンク
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