HP RPN SCIENTIFIC WP 34S Owner's Manual page 161

exponent of the number represented. The 16 digits of the significand allow for a
range from 1 to almost 10
Rewarding your patience so far, we will show you some illustrative examples of the
encoding in your WP 34S instead of telling you more theory:
Floating point Hexadecimal value stored
number
22 38 00 00 00 00 00 01
1.
A2 38 00 00 00 00 00 01
-1.
22 38 00 00 00 00 00 6F
111.
22 2C 00 00 00 01 bC 6F 06F 06F
111.111
A2 20 00 00 07 b0 00 7b 07b 000 07b
-123.000123
9.99∙10 99 23 bC 00 00 00 00 03 E7
–99
20 AC 00 00 00 00 00 01
1∙10
–383
00 3C 00 00 00 00 00 01
1∙10
The last number is the smallest that can be entered directly. Dividing it by 10
results in 1∙10
and the result will remain 1∙10
and 5, see RM). Divide it by 2 instead and the result will become zero.
Look at the other end:
77 FF E7 F9 FE 7F 78 00 9 3E7 3E7
9.999 999
999 99∙10 384
This number (featuring the digit 9 twelve times) is the greatest that can be entered
numerically. Adding 9.999∙10
1∙10 385 77 FF E7 F9 FE 7F 9F E7
... which is stored as 9.999 999 999 999 999
representable. All this follows Decimal64 floating point format, though not exactly.
Additionally, your WP 34S features three special numbers:
78 00 00 00 00 00 00 00
Infinity
F8 00 00 00 00 00 00 00
-Infinity
7C 00 00 00 00 00 00 00
not nuMmeric
These special numbers are legal results on your WP 34S if flag D is set.
WP 34S Owner's Manual
16
.
–398
, being stored as hexadecimal 1. Divide this by 1.999 999 999 99
–398
372
Bottom bits split
in groups of 10
in default rounding mode (and in RM 1, 2, 3,
3E7 3dE 000
to it will display 1∙10
9 3E7 3E7
3E7 3E7 3E7
∙10 384
Edition 3.1
Top 14 bits in binary
representation
0010 0010 0011 10
1010 0010 0011 10
0010 0010 0011 10
0010 0010 0010 11
1010 0010 0010 00
0010 0011 1011 11
0010 0000 1010 11
0000 0000 0011 11
0111 0111 1111 11
385
...
0111 0111 1111 11
This is the greatest number
.
0111 1000 0000 00
1111 1000 0000 00
0111 1100 0000 00
Page 161 of 211
Stored
expo-
nent
398
398
398
395
392
495
299
15
15
767
767
n/a
n/a
n/a