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bit-bang serial port driver; is source avalible
I'm prototyping code for an embedded processor project using DOS. I'm using
DOS because I'm not yet sure exactly what the target microprocessor will be and DOS is closer to the hardware than Windows (or Linux for that matter). I'd forgotten how much fun DOS was to use for this sort of thing. As it turns out I NEED TWO SERIAL PORTS ON A LAP TOP for the demo. I have about 10 old (IBM and a few other) laptops but none has two serial ports. I thought I'd write the code for a bit banged serial port using the COM1 handshake lines to give a second serial port, allowing the use of only connector. I've done this sort of thing with various microprocessor years ago but never with a PC. The final design will only need one serial port, but 'till then: Does anyone know where I can get the source (C or even ASM) for a bit banged serial port for a PC (preferably using the COM1 handshake lines)? Any help will be appreciated. Thanks You, Jack Subj:bit-bang serial port driver; is source avalible |
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