fixed-point numbers; each uses a different
 *    number of bits for the parts of the number. Choose whichever is most
 *    appropriate (for optimization). */</PRE>
<PRE><A NAME="IX_BBFixed"> </A>	/* BBFixed
	 * One byte integer, one byte fraction */
typedef struct {
    byte		BBF_frac;		/* fractional portion */
    byte		BBF_int;		/* integral portion */
} BBFixed;</PRE>
<PRE>	/* BBFixedAsWord
	 * Sometimes it is convenient to refer to a BBFixed value as type word.
	 * The BBFixedAsWord type is used for thi