Hi,
I'm confused about that second calculation....
My captured range of values for BD[2] is $21 -$34 and for BD[3] it's again $00-$7F
Ignoring the first digit of BD [2] gives a range of values that seems to work.
If you just look at the "right hand" digit of BD[2] your formula will return the same result when BD[2]=$21 and $31 and so on. Let's say BD[2] is $22 and BD[3] is $10 then your formula would be 2*128+16=272. Now lets say BD[2] is $32 and BD[3] is $10, your formula returns 2*128+16= 272 - is that really correct?

/Henrik.