Invisibles

Did you know that…

  • draining the iOS-batterie below 20% simulates a decreasing contrast of the LC-display. Charging the device sets back the full contrast.
  • the display of the iOS-device does not turn off as long as a calculator program is running. So, be careful with infinite loops!
  • the memory is limited to 999 steps for programming though, but programs which  are together larger than 999 steps, can be loaded at the same time into the memory. In that way you can for example load a program into P0 with 600 steps and then a program into P1 with 700 steps. The program counter on the right shows the overflow with — instead of 000.
    You can use programs in overloaded memory without problems.
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AirPrint, Version 2.3

IMG_3035Right at this moment version 2.3 has been finished, which now just has to pass the review-process before you can see it in the App Store.
What’s new is the AirPrint function for iPhone, iPod Touch and iPad. Number lists, calculation steps, program outputs or program listings can now be copied on paper. Therefor a new button has been created. On the iPhone it is in the printer-view right next to the green linefeed-button. On the iPad it is in the bottom left area, right next to the switch.
To say it right away: Calculator output cannot be streamt “live” on a real printer. You print just that, what has been virtually printed on the paper strip in the printer view already. In a printer dialog you can specify whether you want to print all or certain pages only.

There are some news about the clipboard also. So far you could define with a switch in the settings whether the last result shall appear in the clipboard. This switch now is called Print-out to clipboard and it causes the entire content of the virtual paper strip being copied to the clipboard. Copying is done automatically when you switch to another app, where you want to paste the content.

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Printer Simulation, Version 2.2

Finally the simulation of the printer FP-10 for the iPhone has been finished. iPad-users know it already. The next days we expect the update as version 2.2 to be available in the App Store. We are just waiting for its release.
The virtual printer prints manual calculation steps as well as running program output on continuous paper. The command sequence SAVE INV EXE prints out the last value. If this sequence follows a string with a closing “, then the string will be printed..

Example, Square numbers from 0 to 10:

MAC AC 11 MinF
LBL0 MR00 x² SAVE invEXE ISZ MR00 x=F GOTO1 GOTO0
LBL1

or

MAC AC 11 MinF
LBL0 MR00 x² “AR00 #” SAVE invEXE ISZ MR00 x=F GOTO1 GOTO0
LBL1

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Version 2.1.1

This update fixes some small defects, which might occur due to internal roundings.
Examples:

123456789 / 100 = FRAC
Result before: 0.889999999
Result now: 0.89

1 +/- FRAC
Result before: 9.992007222e-14
Result now: 0

-0.5 FRAC + 0.5
Result before: 9.992007222e-14
Result now: 0

A tiny visual change has been done for the iPad with Retina-display: The 7-segment-digits for the exponential display were not visible at all when not used. Now you can see them as transparent segments.

Thank you to those users, who found these defects and reported them.

Addendum (April, 5th)
A customer sent me a message that this version has a serious defect, which affects the iPhone 5 series only and the iPod touch with the same display: The first two rows of the keyboard are not usable.

A bugfix release of version 2.1.2 has been created and sent to Apple for review for the App Store.

I apologize for this problem and hope that you still will like this app.

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A Happy New Year

A Happy New Year to all of you. For the past year I want to say thank you to all of you, who gave me precious feedback by e-mail where I found praise and constructive criticism. You expressed wishes what to do better or what kind of functionality you miss. Most of it has been done or I put it on my list. There are only a few proposals which I cannot realize. And those are by now only very few. In such case a proposal exceeds the idea of the app by far or I couldn’t quite yet get used to the idea. Then there are still proposals, which I put to the end of the list, since they are extravagant in planning and programming or because I’m still undecided to include them into the app.
But anyway I’m very happy about a good e-mail contact to you, which motivates me and shows me, how much you are interested in my app. So, please keep going!

There is a difficult situation for me, when customers buy my app but do not contact me when they encounter a problem. Then they give a less good rating in the app store. That does not help the customer and me either. It is impossible for me to reply helpfully to the customer’s complaint directly.
Currently I’m trying to do it that way, that I repeat the customer reviews from the various app stores here and add helping comments if applicable.

The last update is now some time back already. But it is going on, and new updates are already in work. So, be patient and stay tuned!

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New iOS 7 Layout

Today the new version 2.1 of FX-602P Sim has been released in the app store with a fresh new layout of the calculator, which has been adapted to the iOS 7 design.

Classical and new layout
Classical and new layout

However, it is still possible to stay with the previous classical-designed layout. Since this software simulates an existing calculator, the option for this past look and feel should still be available for you.

You can switch back and forth at any time between both layouts, which have been made for iPhone, iPod touch and iPad.

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iOS 7 Update

Last night FX-602P Sim has been adapted for iOS 7 and is in Apple’s review process now. This update should be available in the app store very soon as version 2.0.3.
The graphical elements of the calculator haven’t been changed. And the app continues to work on older iOS-versions, which are not older than 4.3.

Addendum (September, 19th)
The version 2.0.3 has been released in the App Store surprisingly quick. That’s the good thing. The less good thing is: I realized that the switches inside the calculator’s settings are not working properly. The reason for it is a programming defect, which causes a misalignment. That means the setting for the second switch affects the meaning of the first, the third for the second and so forth.

As a workaround for the meantime I recommend not to use the calculator’s settings. Use instead the settings-app from Apple and select FX-602P Sim to set the switches as desired. That works.

I apologize for this inconvenience and thank you for your patience. A bugfix will be released as soon as possible.

September, 24th
Version 2.0.4 was released in the App Store and fixes this defect.

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The beginning

There are tons of calculator apps in the App Store now. So why to add another one to it? Well, many of them look nice and fancy, include a great variety of functions and are gorgeous apps. But very few of them are programmable, using  RPN, which is not everyone’s taste.

As an owner of a programmable calculator, which I bought 30 years ago for a lot of money and which I occasionally like to use, I was looking for such an app for the iPhone, which simulates this calculator. This calculator is extremely easy to program. You don’t have to learn a new language. The commands are short and memory efficient. With some practice you can program little tasks very quick without much efforts.

Searching the internet I found a Java-version for diverse platforms, which simulates the desired calculator. But unfortunately it was not available for iOS-devices.

In September 2011 I began to program a version for the iPhone and iPod touch myself. The calculator was developed at home during the time after daily work and on weekends and should have been finished by the end of December 2011. Finally in March 2012 after many tests the calculator was in a state, where I couldn’t find any severe defects any more. It was ready to be placed into the App Store. The calculator now was fully working.

But with the release in the App Store the project was not finished. Some customers had some feature requests or wishes already. For the iPad there wasn’t a tailored solution yet at the time. The app ran on it in the iPhone-simluation-mode only.

In the meantime a universal-app is now also available for download in the App Store. On the iPad a simulated printer has been added to the app. That needs to be done for iPhone and iPod touch as well. But that will follow after migrating the app for iOS 7.

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