  Decimal-to-binary conversion is important to modern binary computers. The
classical method to solve this problem is based on division operation. In this
paper, we investigate a decimal-to-binary conversion method based on addition
operation. The method is very easily implemented by software. The cost analysis
shows that the latter is more preferable than the classical method. Thus the
current Input/Output translation hardware to convert between the internal digit
pairs and the external standard BCD codes can be reasonably removed.
