A B A C U S   A S   A   H E X A - D E C I M A L   C A L C U L A T O R
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The Chinese Abacus has two beads in the upper rows and five beads in
the lower rows. One upper bead is equivalent to "5" and one lower
bead is equivalent to "1". For representation of the decimals 0...9
only one "5" and four "1" beads are necessary in an Abacus ...

... BUT - The full Abacus can be used for HEXA-DECIMAL Calculations:

To enter a number shift the beads towards the inner wooden bar...

Example:    0123,4567.89AB,CDEF  in  a  16-BIT-WORD  is  represented:

          +---------------------------------+
          | o o o o o o o o o o . . . . . . |
          | o o o o o o . . . . . . . . . . |
          | . . . . . . . . . . o o o o o o |
          | . . . . . . o o o o o o o o o o |
          |=================================|
          | . o o o o o o o o o . o o o o o |
          | . . o o o o . o o o . . o o o o |
          | o . . o o o . . o o o . . o o o |
          | o o . . o o o . . o o o . . o o |
          | o o o . . o o o . o o o o . . o |
          | o o o o . . o o o . o o o o . . |
          | o o o o . . o o o . o o o o o . |
          +---------------------------------+
            0 1 2 3 4 5 6 7 8 9 A B C D E F


HOW TO USE the ABACUS for all:        Add, Subtract, Multiply, Divide
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                                      CLICK HERE ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  1st April 2009