这是一个完整；BCD浮点包为8051微—

控制器。它提供了8位的指数，精度

；范围从127到127。尾数是压缩BCD码，而

；指数是伪二表达的补充。一零指数

；是用来表示数为零。指数值为80H或

；大于意味着指数为正，即80h = 0，

；81h = E + 1，82H = E + 2等。如果指数7FH或更少，

；指数为负，7FH＝1，7eh = E-2，等等。

；所有的数字都被假定为归一化和所有的结果

归一化后的计算。归一化的尾数＞＝10。

；< = 99999999。

；

；在记忆数字假定要被存储，如下：

；-　This is a complete BCD floating point package for the 8051 micro-

　controller. It provides 8 digits of accuracy with exponents that

　range from+127 to-127. The mantissa is in packed BCD, while the

　exponent is expressed in pseudo-twos complement. A ZERO exponent

　is used to express the number ZERO. An exponent value of 80H or

　greater than means the exponent is positive, i.e. 80H = E 0,

　81H = E+1, 82H = E+2 and so on. If the exponent is 7FH or less,

　the exponent is negative, 7FH = E-1, 7EH = E-2, and so on.

　ALL NUMBERS ARE ASSUMED TO BE NORMALIZED and all results are

　normalized after calculation. A normalized mantissa is >=.10 and

　<=.99999999.

The numbers in memory assumed to be stored as follows: