inp

raw OCR

Reads a byte from a hardware port.

Defined in header <conio.h>

Syntax

#include <conio.h>
int inp(unsigned portid);

Portability

DOS	UNIX	Windows	ANSI C	C++ only
■		■

Remarks

inp is a macro that reads a byte from the input port specified by portid.

If inp is called when conio.h has been included, it will be treated as a macro that expands to inline code. If you don't include conio.h, or if you do include conio.h and #undef the macro inp, you get the inp function.

Return value

inp returns the value read.

Example

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

int main(void)
{
   int result;
   unsigned port = 0;
   result = inp(port);
   printfC'Byte read from port %d = Ox%X\n", port, result);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/conio.h/inp/ · short form /3.1/inp/

inp