AT&T 6300 Programmer's Manual page 631

Advanced Features
• If exp
<
>0, then the mantissa is normalized
and
number = sgn
*
.1 man
*
2
**
(exp -80h)
That is, in single precision (hex notation -
bytes low to high)
00000080
=
\.5
00008080
=
-.5
Double Precision - 56 bit mantissa
o
1 2 3 4 5
6 7
I
loman
I I
Sihiman
I
exp
B-5