HP 32SII Owner's Manual page 143

Arithmetic in bases 2, 8, and 16 is in 2's complement form and uses integers
only:
If a number has a fractional part, only the integer part is used for an
arithmetic calculation.
The result of an operation is always an integer (any fractional portion is
truncated).
Whereas conversions change only the displayed number and not the number
in the X–register, arithmetic does alter the number in the X–register.
If the result of an operation cannot be represented in 36 bits, the display
shows
possible.
Example:
Here are some examples of arithmetic in Hexadecimal, Octal, and Binary
modes:
Keys:
{
12F E9A
{
7760
100 5
{
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24
and then shows the largest positive or negative number
12F + E9A
16
Display:
}
7760
8
}
4326
100
5A0 + 1001100
16
} 5A0
Base Conversions and Arithmetic 10–3
Size : 17 .7 x 25.2 cm
= ?
16
Description:
Sets base 16; HEX
annunciator on.
Result.
= ?
– 4326
8
Sets base 8: OCT
annunciator on. Converts
displayed number to octal.
Result.
= ?
– 5
8 8
Integer part of result.
= ?
2
Set base 16; HEX
_