//-------------------------------------------------------------------
//	cmosdump.cpp
//
//	This program reads the Real-Time Clock's nonvolatile memory-
//	locations and displays their contents in hexadecimal format.
//
//	NOTE: run the 'iopl3' utility before executing this program.
//
//	programmer: ALLAN CRUSE
//	written on: 02 APR 2004
//-------------------------------------------------------------------

#include <stdio.h>	// for printf(), perror() 
#include <stdlib.h>	// for exit() 
#include <sys/io.h>	// for iopl()

int main( int argc, char **argv )
{
	// change i/o privilege-level to allow i/o-port access
	if ( iopl( 3 ) ) { perror( "iopl" ); exit(1); }

	// display contents of the 128 CMOS storage-locations
	printf( "\nCMOS Non-Volatile Memory \n" );
	for (int i = 0; i < 128; i++)
		{
		if ( ( i % 16 ) == 0 ) printf( "\n%03X: ", i );	
		outb( i, 0x70 );
		short	val = inb( 0x71 );
		printf( "%02X ", val );
		}
	printf( "\n\n" );
}