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8. I/O Device Hacks > 79. Boost COM Port Performance

Boost COM Port Performance

If your PC has a COM port, tweak your state-of-the-art UAR/T chip through Windows settings.

Back in the olden days of the early PCs, getting online meant dialing in to CompuServe, Delphi, or The Source with a 300- to 1,200-baud modem, only to arrive at the legacy equivalent of Telnet—plain white characters on a green or black screen background, text menus (online servers were truly mainframes back then), and XMODEM downloads of “huge” 300 KB files. Back then, you could connect at 2,400 baud—or better yet 9,600—if your local node supported it, but this was a real challenge and a technical stress on PC serial ports. Generally, a PC built before 1990 couldn’t communicate with the outside world any faster than 9,600 bits per second (bps).


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