how to read/write to ports

This is a discussion on how to read/write to ports within the C Programming forums, part of the General Programming Boards category; hello i am trying to read/write a value to a port (240h for example) but whenever i use inportb() or ...

  1. #1
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    Sep 2001
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    Unhappy how to read/write to ports

    hello i am trying to read/write a value to a port (240h for example) but whenever i use inportb() or outportb() my compiler (bloodshed DEV++) flags it as a reference as an undefined function. i have included the stdio.h, conio.h and dos.h files but still nothing. my sample code is:

    #include <stdio.h>
    #include <conio.h>
    #include <dos.h>

    int main()
    {
    int inportb();
    int result;
    while(1)
    {
    result= inportb(0x240);
    printf("Result is %d",result);
    }
    rteurn 0;
    }

  2. #2
    Guest Sebastiani's Avatar
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    Don't know for sure.

    But sometimes, believe it or not, just re-ordering the #include files does the trick! I've had a similar problem solved this way.

    It's a long shot, but...



    ITSA
    Socket Library!

  3. #3
    Guest Sebastiani's Avatar
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    BTW, in my system, Win '98, Bloodshed Dev compiler, "inportb" for instance, is referenced in WAVE.h ...



    ITSA
    Socket Library!

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