Borland C++ reference
Borland C++ 3.1 › <conio.h>

outpw

raw OCR

Outputs a word to a hardware port.

Defined in header <conio.h>

Syntax

#include <conio.h>
unsigned outpw(unsigned  portid, unsigned value);

Portability

DOSUNIXWindowsANSI CC++ only
■■

Remarks

outpw is a macro that writes the 16-bit word given by value to the output port specified by portid. It writes the low byte of value to portid, and the high byte of the word to portid +1, using a single 16-bit OUT instruction.

If outpw 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 outpw, you'll get the outpw function.

Return value

outpw returns value.

See also

Example

#include <stdio.h>
iinclude <conio.h>
int main(void)
{
   unsigned value, port = 0;
   value = outpw(port, 64);
   printfi"Value %d sent to port number %d\n", value, port);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

These are search links, not yet checked by hand.

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