Settings — Adapting RPN-67 to your needs

Settings are accessed by tapping the cog-wheel in the upper left corner. Tap "Save" to apply your changes, "Cancel" to exit without changing any setting.

Turning this setting to anything but Off adds several improvements to the basic HP-67:

In normal use, this setting should be left on Max. The main reason for the other settings is to let RPN-67 run programs which take advantag of the limited precision of the HP-67. For example, adding 100,000 to π, then subtracting 100,000 again results in 3.141600000 on an HP-67.


Turning this setting to ON lets the simulation run much faster than a real HP-67.
Pause lengths, blinking times and so on are, of course, not affected.


On the HP-67, single-stepping a program treats subroutines as a single instruction,
making it difficult to debug subroutines.
Turning this setting to ON allows you to single-step into subroutines.


RPN-67 allows you to set up to 10 breakpoints, each with its own counter.
Breakpoint commands are shown after tapping GTO, STO, or RCL, followed by the
Info button in the lower-left corner.
Turning this setting to ON enables the breakpoint feature.


The maximum number of steps an HP-67 can hold is 224. You may double the size to 448,
making it possible to run programs which previously required two cards. The default size is 999.
Note that program cards only store as many steps as required.
The unusual program shown at right (taken from the HP-67 Owner's Handbook, page 248) works only if placed in program memory as shown, with "Number of Program Steps" set to 224.


Set the volume of the keyclick sound to your liking.


The HP-67's default pause length of one second may be doubled, or even set to five seconds.
Tapping a key while pausing will start another pause interval.


Turn this setting on if you find the black keyfronts are hard to read. You may restrict
the revealing of the texts to the lower-half part of the keyboard.


If you find the HP-67's LED digits hard to read, try this setting.


Every time you try to load a program which is different from the currently loaded one,
you'll be warned. (There is no warning if the program memory is empty.)
You can turn these warnings off with this setting.


Select your favorite background pattern here. To load your own background image:

Note that images with dimensions larger than 1024x768 are ignored.
Smaller images are repeated as necessary to fill the entire background area.
To remove a user image, simply install a 1x1 pixel image. Download


These two buttons select predefined RPN-67 settings.

Vintage HP-67: This setting most closely simulates a real HP-67.
Default Settings: This setting is recommended for most users.


Fibonacci Numbers

001:  33 00       STO 0
002:  34 00       RCL 0
003:  34 01       RCL 1
004:  61          +
005:  31 84       -x-
006:  33 01       STO 1
007:  22 24       GTO (i)
008:  35 22       RTN
009:  84          R/S
010:  84          R/S


211:  31 25 11    LBL A
212:  01          1
213:  00          0
214:  42          CHS
215:  35 33       ST I
216:  00          0
217:  33 00       STO 0
218:  01          1
219:  33 01       STO 1
220:  31 84       -x-
221:  34 00       RCL 0
222:  34 01       RCL 1
223:  61          +
224:  31 84       -x-

(This program will only run correctly if "Number of Program Steps" is set to 224.)


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