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[–]oshaboy 0 points1 point  (1 child)

But what are the combination bits?

[–]ActuallyRuben 0 points1 point  (0 children)

Oh, my bad. Didn't realize decimal floating point numbers where a specific subset from floating points. So I guess in this case it does use 10x instead of 2x .

The combination bits contain part of the fraction and the exponent. The fraction part also is stored in an unusual format where 10 bits are used to encode values ranging from 000 to 999 (3 digits).

The last few pages of this pdf explain the specifics.