vMultiple- Precision Binary NumbersúSingle – precision  --   one- byte unsigned          numbers ( range: 0-255)úDouble – precision --   two- byte unsigned           numbers (range: 0-65 535)úTriple – precision –  three- byte unsigned             numbers (range: 0-16 777 215)

vZero Flag

    - shows that the last operation produced a result of 0. Unusual feature of the zero flag:

  - Contains a 1 when result is 0 and the flag is 0 when the result is anything other  than 0.

    - 0 says that something is false or has not occurred. 0 says, “No, this number was not the number zero”.

  - 1 says that something is true or has occurred. 1 says, “Yes, the number is the number zero”.

vSubtraction-with-Carry (Borrow)

  - tells us that to produce the answer (difference) the microprocessor had to borrow a 1 from a 9th bit. This occurs when the top number (minuend) is smaller than the bottom number (subtrahend).

v Multiplication and Division

  - there are several software algorithms for both multiplication and division which work well with the 8 bit microprocessors.