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PORT IO

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by tungtran75 1 view

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I now writing a program in Visual Basic to control an I/O device. I want to make a activeX control like mscomm of Microsoft. It has address of H'300. So how can I do it.

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by wimton

There is a devicedriver called DirectIO. (at least for NT, I do not know about other OS's). After opening the device, one can directly read and write to IO ports with IOCTL instructions.
Not very secure, but it saves writing a custom devicedriver.

Wim

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