Texas instruments TI-86 Financial Functions

TI-86 Financial Functions

Loading and Installing Finance Features on Your TI-86...............................2

Loading the Finance Features into TI-86 Memory..............................................................................2

Installing the Finance Features for Use...............................................................................................2

Displaying the FIN (Finance) Menu..................................................................................................... 3

The FIN Menu.....................................................................................................................................3

Uninstalling the Finance Features.......................................................................................................3

Deleting the Finance Program from TI-86 Memory ............................................................................ 3

The TVM (Time-Value-of-Money) Variables................................................... 4

FIN VARS (Finance Variables) Menu...................................................................................................4

Setting the Payment Format...........................................................................4

Payment Format Editor....................................................................................................................... 4

Entering Cash Inflows and Cash Outflows..........................................................................................4

Using the TVM (Time-Value-of-Money) Solver.............................................. 5

FIN TVM Solver Menu.........................................................................................................................5

Solving for an Unknown TVM Variable (Payment Amount)................................................................5

Financing a Car...................................................................................................................................6

Computing Compound Interest........................................................................................................... 6

Using the Financial Functions.......................................................................... 7

Entering Cash Inflows and Cash Outflows..........................................................................................7

FIN FUNC (Financial Functions) Menu................................................................................................ 7

Calculating Time-Value-of-Money......................................................................................................7

Calculating Cash Flows.......................................................................................................................8

Calculating Amortization.................................................................................................................... 9

Amortization Example: Calculating an Outstanding Loan Balance................................................... 10

Calculating Interest Conversion........................................................................................................ 11

Finding Days Between Dates............................................................................................................ 11

Defining the Payment Method..........................................................................................................11

Menu Map for Financial Functions ............................................................... 12

MATH Menu (where FIN is automatically placed).............................................................................12

(MATH) FIN (Financial) Menu...........................................................................................................12

FIN TVM (Time-Value-of-Money) Solver Menu................................................................................. 12

FIN FUNC (Financial Functions) Menu.............................................................................................. 12

FIN VARS (Financial Variables) Menu...............................................................................................12

FIN FORMT (Financial Format) Menu................................................................................................12

Assembly Language Programming: Financial Functions

Loading and Installing Finance Features on Your TI-86

To load the financial features onto your TI-86, you need a computer and the TI-86 Graph Link software and cable. You also need to download the finance program file from the Internet and save it on your computer.

Loading the Finance Features into TI-86 Memory

When sending a program from your computer to the TI-86, the calculator must no be in Receive mode. The Receive mode is used when sending programs or data from one calculator to another.

The executable file associated with the assembly language program ( appears on the

menu, but you need

NAMES

not do anything with it.

finexe

PRGM

)

Start the TI-86 Graph Link on your computer.

Turn on your TI-86 and display the home screen.

Click on the Send button on the TI-86 Graph Link toolbar to display the Send dialog box.

Specify the finance program file as the file you want to send.

Send the program to the TI-86. The program and its associated executable file become items on

PRGM NAMES

the

Exit Graph Link

(WLink86.exe)

- l

finance1.86g

menu.

For assembly language programs that must be installed, up to three can be installed at a time (although the TI-86 can store as many as permitted by memory). To install a fourth, you must first uninstall (page 3) one of the others.

The variables that will be overwritten are listed on the

FIN FUNC

menus (page 12).

and

FIN VARS

Installing the Finance Features for Use

Use the assembly language program

Finance

to install the finance features directly into the TI-86’s built-in functions and menus. After installation, the finance features are available each time you turn on the calculator. You do not need to reinstall them each time. When you run assembly language programs that do not install themselves into the - Œ / menu, their features are lost when you turn off the calculator.

All examples assume that on your TI-86. The position of

Finance

FIN

is the only assembly language program installed

on the

MATH

menu may vary, depending on how

many other assembly language programs are installed.

from the

CATALOG

PRGM

Finance

- w & #

(move 4 to

Asm(

)

8 &

Financ

(select

)

Select

Asm(

from the

to paste it to a blank line on the home screen.

Select

NAMES

Financ

menu to paste

to the home screen as an argument.

Run the installation program.

Caution:

If you have values stored to variables used by the finance features, they will be overwritten. To save your values, press * to exit and then store them to different variables. Then repeat this installation.

Assembly Language Programming: Financial Functions

s n

If other assembly language programs are installed, may be in a menu cell other

- Œ /

than

FIN

Continue the installation. (Your

version number may differ from the one shown in the example.)

Display the home screen.

Displaying the FIN (Finance) Menu - Œ /

When you install the financial program on your TI-86 and activate it, the last item on the

NUM PROB ANGLE HYP MISC 4 INTER FIN

MATH

menu.

Finance Menu

The FIN Menu - Œ / '

TVM FUNC VARS FORMT Uninst

TVM Finance Uninstall Solver Variables Menu Instruction

Functions Menu Format Editor

Financial Payment

FIN

becomes

When you uninstall the finance features, the finance assembly language program

Finance

( in memory, but the is removed from the menu.

Deleting the program does not delete the variables associated with the program.

and

finexec

) remain

FIN

optio

MATH

Uninstalling the Finance Features

Uninst

FIN

menu, and then

Yes

from the

- Œ / ' *

)

FIN

Display the select

If you are sure you want to uninstall, select confirmation menu. The menu is removed and the home screen is displayed. (Your version number may differ from the one shown in the example.)

Deleting the Finance Program from TI-86 Memory

Select

DELET

from the

menu.

PRGM

Select

DELET

from the

menu.

Move the selection cursor to

Finance

, and then delete it.

Move the selection cursor to

finexec

, and then delete it.

MEM

- ™ '

/ *

(as needed)

Assembly Language Programming: Financial Functions

The TVM (Time-Value-of-Money) Variables

FIN VARS (Finance Variables) Menu - Œ / ' (

TVM FUNC VARS FORMT Uninst

I PV PMT FV

PY CY

Prompts that correspond to some TVM variables are shown in parentheses.

Number of payment periods

Interest rate (

Present value of loan or lease

Payment amount

PMT

I%=

)

Future value of loan or lease

Payments per year (

Compounding periods per year(

P/Y=

)

C/Y=

♦ When you enter a value at prompts in the payment format editor (page 4) or

the TVM Solver (page 5), the corresponding variable values are updated.

♦ When you solve for a TVM variable using the TVM Solver, the corresponding

variable value is updated.

♦ When you enter numbers as arguments for a TVM function, the corresponding

variable values are not updated.

♦ When you solve for a TVM variable using a TVM function, the corresponding

variable value is not updated.

Setting the Payment Format

Payment Format Editor - Œ / ' )

TVM FUNC VARS FORMT Uninst

)

You also can change a setting by storing a value to

or CY or by executing

PY pEnd

pBegin

(page 11).

The payment format settings define the number of payments per year ( compounding periods per year (

), the number of

P/Y

C/Y

), and whether the payments are received at the end or beginning of each period (

PMT:END BEGIN

The payment format editor to the right shows the defaults. To change payments per year or compounding periods per year, enter a new value. To change the payment due setting, move the cursor onto

END

BEGIN

and then press b.

Entering Cash Inflows and Cash Outflows

When using the financial functions, you must enter cash inflows (cash received) as positive numbers and cash outflows (cash paid) as negative numbers. The financial functions follow this convention when computing and displaying answers.

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