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The IBM 3270 PC (IBM System Unit 5271), released in October 1983, was an IBM PC XT containing additional hardware which could emulate the behaviour of an IBM 3270 terminal. It could therefore be used both as a standalone computer, and as a terminal to a mainframe. IBM later released the ''3270 AT'' (IBM System Unit 5273), which was a similar design based on the IBM PC AT. They also released high-end graphics versions of the 3270 PC in both XT and AT variants. The XT-based versions were called 3270 PC/G and 3270 PC/GX and they used a different System Unit 5371, while their AT counterparts (PC AT/G and PC AT/GX) had System Unit 5373.〔 == Technology == The additional hardware occupied nearly all the free expansion slots in the computer. It included a video card which occupied 1-3 ISA slots (depending on what level of graphics support was required), and supported CGA and MDA video modes. The display resolution was 720×350, either on the matching 14-inch color monitor (model 5272)〔 or in monochrome on an MDA monitor. A further expansion card intercepted scancodes from the 122-key 3270 keyboard, translating them into XT scancodes which were then sent to the normal keyboard connector. This keyboard, officially called the 5271 Keyboard Element, weighed 9.3 pounds.〔 The final additional card (a 3278 emulator) provided the communication interface to the host mainframe.〔 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 3270 PC」の詳細全文を読む スポンサード リンク
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