The 4th post includes this:

SSD4= (ssmax[34]>>4)
SSD3= (ssmax[34] & $f)
SSD2= (ssmax[23]>>4)
SSD1= (ssmax[23] & $f)

It appears that somehow this is reading the digits out of the bytes, but I have never seen the notation before.

>>

& $f

Do these somehow mean first digit and second digit?

TG