Texas Instruments TI-89, TI-92

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

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

ë2,147,483,648 0h7FFFFFFF

2,147,483,647

0h0

0h1

0hFFFFFFFF

ë1