AAM - Ascii Adjust for Multiplication

	Usage:	AAM
	Modifies flags: PF SF ZF (AF,CF,OF undefined)

	Used after multiplication of two unpacked decimal numbers, this
	instruction adjusts an unpacked decimal number.  The high order
	nibble of each byte must be zeroed before using this instruction.
	This instruction is also known to have an undocumented behavior.

				 Clocks			Size
	Operands	 808x  286   386   486		Bytes

	none		  83	16    17    15		  2

	- see Instruction Timing