procedure sub64(VAR value1:clunk_type;
		VAR value2:clunk_type;
		VAR result:clunk_type;
		VAR ids:integer); NONPASCAL;

{ LAST EDIT: 25-OCT-1987 18:54:25 

  This is the external declaration for the Pascal callable routine to return 
  the result of the subtraction of two clunk values. This external
  declaration expects that the file 'CLUNK.TYP' has been included at some 
  point before this. Note that a clunk value is represented from [LSW..MSW].

  How it works:
  You need supply two clunk values and it will subtract value2 from value1 
  and return the result. The values stored in value1 and value2 are preserved.

  Two valid "ids" statuses are possible:
   1 = success
  -3 = underflow
}