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

// declare function as extern because it will be resolved during link-time
extern void cpuid_query(unsigned long, unsigned long far *); 

void main()
{
int i = 0;
// our output buffer, 4x4 = 16 bytes long
unsigned long far * theptr = (unsigned long far *)malloc(4 * sizeof(long)); 


// define initial values of this array because I want to show that the ASM routine will 
// overwrite these numbers
theptr[0] = 10;
theptr[1] = 20;
theptr[2] = 30;
theptr[3] = 40;
printf("Original theptr array: ");
for(i = 0; i < 4; i++)
	printf("%d ", theptr[i]);

// Just to demonstrate the difference between a straight C pointer and a seg:offset combo
printf( "\nThe ptr in C %lX", theptr );
printf( "\nPTR seg and offset %X %X\n", FP_SEG(theptr), FP_OFF(theptr) );



// Check out Intel docs for the list of valid function IDs that can be passed to the CPUID 
// instruction. The values used below are some function IDs that I know my CPU supports.
// These values are also probably meaningless if you don't look it up in the Intel docs.
cpuid_query((unsigned long)0x00, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x01, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");


cpuid_query((unsigned long)0x02, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x03, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x04, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x05, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000000, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000001, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000002, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000003, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000004, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

cpuid_query((unsigned long)0x80000006, theptr);
for(i = 0; i < 4; i++)
	printf("%08lX ", theptr[i]);
printf("\n");

}