Chapter-19-Serial communications

Chia sẻ: Vinh Nghi | Ngày: | Loại File: PDF | Số trang:15

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Chapter-19-Serial communications

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UNIX has always had a high level of support for serial lines, but their purpose has changed dramatically. In the early 70s, the standard ‘‘terminal’’ was a Teletype KSR35, a 10-character-per-second serial printer with keyboard. Early UNIX serial line support was geared towards supporting these devices, either directly connected, or via a modem.

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