//-------------------------------------------------------------------
//	showmsw.cpp
//
//	This program executes the unprivileged 'smsw' instruction,
//	to get the current value of the MSW (Machine Status Word),
//	and then displays that value as a string of binary digits.  
//
//	programmer: ALLAN CRUSE
//	written on: 26 JAN 2004
//-------------------------------------------------------------------

#include <stdio.h>	// for printf() 

int main( void )
{
	short	msw;			// word-size storage-location
	
	asm(" smsw %0 " : "=m" (msw) );	// in-line assembly language

	char	message[] = " MSW=xxxxxxxxxxxxxxxx ";
	for (int i = 0; i < 16; i++) 
		message[ 20-i ] = ( msw & (1<<i) ) ? '1' : '0';
	printf( "\n%s\n\n", message );	
}