HP -22S Owner's Manual page 55

Switching base mode has these effects:
• The number in the display is converted to the new base. If you
were in the middle of a calculation (for example, you had keyed in
4
G
5
0
3), all the numbers in the expression are converted to the
new base.
• When you switch
from
decimal to another base, the
integer part
of
the number is displayed in the new base. Internally, the 12-digit
representation of the decimal number is preserved. When you
switch back to decimal base, the full decimal number is displayed,
rounded to the current display format. Numbers are
truncated
to
integers internally only when they are used in an arithmetic opera-
tion in hexadecimal, octal, or binary base.
• Hexadecimal, octal, and binary numbers are right-justified in the
display-that is, they are displayed as far to the right as possible.
• In hexadecimal, octal, and binary base, certain keys are deactivated.
For example, the [[] and [[] keys do not function in octal base; keys
[]] through [[] do not function in binary base. In addition, many of
the HP-22S functions cannot be accessed.
Example: Converting Between Bases. The following keystrokes
do a series of base conversions.
Convert 125
10
to binary, octal, and hexadecimal numbers.
Keys:
125.1
BASE
I
{BN}
.1
BASE
I
{OC}
.1
BASE
I
{HX}
• 1
BASE
I
{DEC}
Display: Description:
1 1111 0 1
Switches to binary
mode; 125
10 =
1111101
2 ,
1 75
Switches to octal
mode; 1111101
2
=
175
8 ,
70
Sets HEX base; 175
8
=
7D
16 ·
125.0000
Restores decimal base .
4: Base Conversions and Base Arithmetic 55