LPT: Need help to READ and WRITE to port

Hi all,

I want to hook some instrumentation to the LPT1: port, control and read its status through this port. However, my compiler (VC++ 6.0) on a Windows XP machine does not recognize 'inportb' or 'outportb' (used in some very old instructions). Here is the basic elements of that code and what I'm attempting to do;

Code:

---

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

void main(void)
{
  int val;
  val=inportb(0x378);      //readport
  outportb(0x378,0x0F);    //write to port
  val=inportb(0x378);      //read again. should be 0F
  printf("%x \n",val);
}

---

Is there some other funciton that I should be using ?

Does someone have a snip of code I could use ?

Thanks

yes, use fopen("prn","w") to create a file pointer to the printer. You can then use all the regular file output functions like fwrite().

I'm not sure if it's possible to do that with Windows XP at all. You might wanna search the board for inportb and outportb.

Thanks Draco !

That has got me started. I was able to produce output !
Now I need to figure out the input bytes and status bytes.