#include "defs.h"

Prototype BuildCheckSum(ULONG *Buffer);

BuildCheckSum(Buffer)
ULONG *Buffer;
{
ULONG B;
WORD	n;
	
	Buffer[5]=0;
	n=0;
	B=0;
	while (n<=127)
	{
		B+=Buffer[n]; 
		n++;
	}
	Buffer[5]=-B;
}