Fixed Point (cont).
The decimal point can actually be located anywhere in the number -- to the right, somewhere in the middle, to the right
Addition of two 8 bit numbers; different interpretations of results based on location of decimal point
xxxxxxxx.0 decimal point to right
4.25 + 7.75 -------- 12.00
xxxxxx.yy two binary fractional digits.
0.07 + 0.12 -------- 0.19
0.yyyyyyyy decimal point to left (all fractional digits)