HP HP-67 Manuel utilisateur

Meet the HP-67*

Congratulations!

With your purchase of the HP-67 Programmable Pocket

Calculator, you have acquired a truly versatile and unique

calculating instrument. Using the Hewlett-Packard RPN logic

system that slices with ease through the most difficult

equations, the HP-67 is without parallel.

As a personal programmable calculator. The HP-67 is so

easy to program and use that it requires no prior programming

experience or knowledge of arcane programming languages.

Yet even the most sophisticated computer experts marvel at

the programming features of the HP-67:

Magnetic cards that record data or programs.

26 data storage registers.

224 program memory steps (expandable to 999**)

Three levels of subroutines, four flags, 20 easily-accessed

program labels.

Indirect addressing using the “I” register.

*Excerpt from the original HP manual

**Added in this emulator!

Topics

In the following pages, we will cover a few topics to get you

started with this emulation of the original HP-67 calculator:

Keyboard layout.

Manual problem solving.

Running programs.

Creating your own programs.

Printing your program listings!

Creating charts!

Instructions on using the built-in program and chart cards.

Keyboard Layout

Each key on the keyboard can have up to three sub-functions

depending on which shift-key is chosen first. The functions

are colored the same as the shift-key: !, !, or !.

For example, this key has three possible shifted functions:!

Black: 1/x, Yellow: SIN, Blue: SIN-1

Manual problem solving

To get the feel of your HP-67, try a few simple calculations.

First, make sure the slider switches at the top are as follows:

(tap them to change their current setting if needed)

To solve: 5 + 6 = 11 , press:!

!!!!

You should see 11.00 in your display. This method of

entering calculations, where the numbers are separated with

the ENTER key and the function is selected last, is called

Reverse Polish Notation (RPN), or Postfix entry. It seems a

little odd the first time, but it allows you to enter calculations

without parentheses. For example, if you wanted to divide the

above total by 4, you would simply press 4, then the divide

key:!

You should see 2.75 now in your display. Intermediate

results are stored automatically when you key in new

numbers. This is how you string calculations together.

The value currently displayed is automatically stored as X, it

is always visible. The value that was previously in X is stored

as Y. Functions such as !swap the two values. Press

this:

! ! !, You should see 4.

Now press: !!, You should see 8.00

repeat the above two key and you’ll see 4.00

Some functions, such as Y to the power of X , or !

depend on the numbers being entered as Y ENTER X, then

entering the function !!. If you find you have

entered numbers in reverse, then simply swap them using the

!function. When you select a function, the letters X

and/or Y may appear in the function label - this reminds you

how the function uses the values X and Y.

Negative Numbers

To key in a negative number, press the keys for the number,

then press CHS (change sign). The number, preceded by a

minus (–) sign, will appear in the display. Pressing CHS

again makes it positive again.

Chain Calculations

When you are solving a problem such as:!

(3 x 5) / (3 + 4)

You proceed from inside the parentheses and work your way

out left to right. Intermediate results are displayed and kept as

you go. For the above problem, proceed as follows:

3ENTER 5, then press ×- result 15.00

3ENTER 4, then press +- result 7.00

Finally, press ÷- final result 2.14

As you can see, each sub-result is “stacked” when you begin

a new “nENTER n” calculation. You can go as deep as four

levels. If you need to, you can always save intermediate

results in a register for later recall.

Display more digits after decimal

Press DSP (display), followed by the number of places you

want to see.

Try DSP 4now - if you did the above calculation, you will

now see 2.1429 in the display.

In addition to the automatic storage used during calculations,

there are registers you can store your numbers to and recall

them for later use. These registers are: 0 to 9 and A to E.

To store the displayed number in a register, press the STO

key followed by the register name. To recall a number in a

You can swap all 0-9 registers between the P(primary) and S

(secondary) banks (the STO/RCL functions only work on the

registers in the P-bank.) Use the !function under the

(F, CHS) key to swap banks. You can keep up to 20 numbers

stored this way - 10 in each bank. (See Charts below).

Running Programs

Use the “Load Card” button to open a program book. The

book graphic emulates the way the original magnetic cards

looked when stored.

Select the program you want, then press “Open.” An

animation will play of the card loading and the sound of the

“card motor”. This is the actual sound recorded from a real

HP-67. When the card is done loading, it will be displayed in

the card holder area above the A-E keys. Note function key

notes can be stored with a program, allowing you to

remember the functions on the program. Notice some built-in

programs are available such as MOON LANDER.

Instructions for that program are in the appendices). To pause/

resume a running program, press R/S key.

Data and Chart Cards

When you see cards in the “Load Card” dialog, you will see

some built-in chart cards with “_C” extension in their names.

These are special data cards stored as charts. After you load

one of these, the “Open” label will appear over the A

function key. Pressing Awill open the chart graphic.

Data-only Card” cards will have a “_D” extension. Loading a

data card will update all the registers from data on the card

saved when it was created.

Saving Programs

Press the “Save Pgm” button to save the currently loaded

program. You will see another dialog allowing you to enter a

name and any function key note labels you might want

displayed.

More on this when we discuss writing programs.

Saving Data

Press “Save Data” to save data from your storage registers

0-9 (Both S and P banks), A-E, and I. They can be copied to a

“Data Card.” There are two types. Both can be used to save

and restore data. The “Data Card” type simply stores the

registers. The “Chart Card” stores the data but allows you to

specify a chart type to display when the card is loaded and

“Open” is run.

Creating Your Own Programs!

Creating programs is, at the most basic, simply storing the

key strokes you would use to complete a calculation and

assigning the keystrokes to a function key for later execution.

There are also advanced commands that let you loop and

branch according to conditions, pause to display output, etc.

However, to start with, you can create simple programs to

automate keystrokes and work your way up to more complex

programs. Programming can be fun! (and addictive), so be

warned.

There is much more on programming the HP-67 on a few

websites. Links will be provided in the Appendices.

Let’s create a simple program to get your started.

Key Codes

First a word about key codes. When you enter a key sequence

into the calculator while in “W/PRGM” mode, you will see

up to three 2-digit numbers in each instruction line. For

example: 31 25 11.

Each of these is a row/column code that maps to your

keyboard. “31” means row 3 column 1 - which is the “f”

shift-key, and so-forth for “25” and “11”.

The one exception is the digit keys. These will be the actual

value such as ’01’ for the 1digit, ’09’ for the 9digit. Since

there is no row “0”, this doesn’t interfere with the other key

codes, and it makes reading the program a little easier, as

numbers are simply the values you enter. However it takes

one line per digit, so try to store large numeric constants in a

Your Own Program

Now let’s try something a little more involved. To calculate

the surface area of a sphere, the formula A= πd2 can be used,

where:

•Ais the surface area of the sphere,

•dis the diameter of the sphere,

•πis the value of pi, 3.141592654.

Ganymede, one of Jupiter’s 12 moons, has a diameter of 3200

miles. You can use the HP-67 to manually compute the area

of Ganymede. Merely press the following keys in order. For a

3200 mile diameter:

3 2 0 0

X2(g-shift 9 key)

π(h-shift 2 key)

The result should be 32169908.78

You calculated the surface area of Ganymede! Now, if you

wanted the surface area of each of Jupiter’s moons, you could

repeat that procedure 67 times, using a different value for the

diameter deach time. An easier and faster method, however,

is to create a program that will calculate the surface area of a

sphere from its diameter, instead of pressing all the keys for

each moon.

Creating the Program. A program is nothing more than the

series of keystrokes you would execute to solve the same

problem manually. Two additional operations, a label and a

return are used to define the beginning and end of the

program.

Entering the Program. To load the keystrokes of the

program into the calculator:

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