These number representations are used for CDC 6000 and 7000 series computers.
Floating point numbers are represented by one bit for the sign (S), 11
bits for the exponent, and 48 bits for the fraction. The exponent
is to the base 2, and has a bias of 97510 (!). Negative
numbers are in one's complement.
SINGLE PRECISION is shown below:
| CDC 48-Bit Floating Point Format | |||||||||||||||||||||||||||||||||||||||||||||||
| S | Exponent | Fraction | |||||||||||||||||||||||||||||||||||||||||||||
| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
32 |
33 |
34 |
35 |
36 |
37 |
38 |
39 |
40 |
41 |
42 |
43 |
44 |
45 |
46 |
47 |
48 |
DOUBLE PRECISION ?
INTEGER numbers are 60 bits long (with a range of -574,460,752,303,423,440 to +574,460,752,303,423,440 [!]), and are in one's complement.