调整方法-8086教学文档

调整方法： AF＝1或(AL)0~3＝A~F，则(AL)  (AL)  06H，AF＝1 CF＝1或(AL)4~7＝A~F，则(AL)  (AL)  60H，CF＝1 ( DAA做‘+’, DAS做‘-’ )例:tDATA SEGMENT t BCD1t DBt34H, 18H ; (1834)BCD t BCD2t DBt89H, 27H ; (2789)BCD t BCD3t DBt2 DUP (?) tDATA ENDS (1) BCD3  BCD1 + BCD2t; (4623)BCD t (2) BCD3  BCD1 - BCD2 ; (9045)BCD = -955