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346 Chapter 20: Number Bases
20NUMBAS.DOC TI-89/TI-92 Plus: Number Bases (English) Susan Gullord Revised: 02/23/01 1:17 PM Printed: 02/23/01 2:19 PM Page 346 of 6
1. Press
3„
to display
Page 2 of the
MODE
screen.
2. Scroll to the
Base
mode,
press
B
, and select the
applicable setting.
3. Press
¸
to close the
MODE
screen.
The
Base
mode controls the
displayed format of integer
results only.
Fractional and floating-point
results are always shown in
decimal form.
If Base mode = HEX:
When
Base
=
HEX
or
BIN
, a
division result is displayed in
hexadecimal or binary form
only if the result is an integer.
To ensure that division always
produces an integer, use
intDiv()
instead of
e
.
If Base mode = HEX:
When
Base
=
HEX
or
BIN
, an integer result is stored internally as a
signed, 32-bit binary number, which uses the range (shown in
hexadecimal and decimal):
If a result’s magnitude is too large to be stored in a signed, 32-bit
binary form, a symmetric modulo operation brings the result into the
range. Any number greater than
0h7FFFFFFF
is affected. For
example,
0h80000000
through
0hFFFFFFFF
become negative
numbers.
Performing Math Operations with Hex or Bin Numbers
For any operation that uses an integer number, you can enter
a hexadecimal or binary number. Results are displayed
according to the Base mode. However, results are restricted to
certain size limits when Base = HEX or BIN.
Setting the Base
Mode for Displayed
Results
Note: The
Base
mode
affects output only. You
must always use the
0h
or
0b
prefix to enter a hex or
binary number.
Dividing When
Base = HEX or BIN
Size Limitations
When Base = HEX
or BIN
Press
¥
¸
to display the
result in
APPROXIMATE
form.
0h prefix in result
identifies the base.
0h80000000
ë
2,147,483,648
0h7FFFFFFF
2,147,483,647
0h0
0
0h1
1
0hFFFFFFFF
ë
1