This app should receive some type of award for it absolute 100% accuracy to the legendary HP calculator which it emulates. As an advanced assembly, C, C++, Objective-C, LISP, etc., I must say that this developer has extraordinary skills.
I still have one of the original HP 97’s, and most of my magnetic program cards are still readable. Thanks to this app, I am able to read off the memory cards to the calculator and then program into the iPad and no I will never lose the hard work I put into those programs many, many years ago!
I have managed to create an (enterpriseª) that should easily plug into this app which allows reading data from the old Hewlett-Packard striped magnetic card via a credit card reader plugged into the headphone jack of the iOS device. If the developer is interested in the source code, I’ll be happy to provide it to him.
We all know memory cards, especially from the late 70s and early 80s are very volatile and, as time passes, more prone to non-recoverable memory loss. As I mentioned above, this beautifully designed app allows us to enjoy the simplicity of cutting edge at the time! It makes one appreciate how much has changed over that past 30-40 years.
While my interest in recovering the data off of the cards is mostly nostalgic, some of the programs I created are unbelievable for the time period in which they were made! It goes to show how far ahead of the curve HP was, and somewhat still is (but declining rapidly, in my humble opinion), in the field of calculator technology.
I have run some tests to compare accuracy between devices and, when running in the non-enhanced speed (e.g. the actual native operational speed of the HP), the results are within milliseconds a beach other and the calculations 100% accurate 99.9% of the time (mostly due to the emulation layer for the HP procesor -> ARM architecture, if I had to guess). Besides, we’re talking discrepancies of several inverse orders of magnitude (therefore, neglible).
Awesome job, thanks for updating to the iPad PRO resolution, you are a true hacker my friend.
ª - As both a standard Apple Developer and an Enterprise/VPP Developer, the card reader was created via my enterprise account and, thus, is not currently available on the app store. If the developer contacts me (just reply to the comment), I’ll make changes to the app to permit approval on the general app store and provide the source code for the framework to CuVee Software, free of charge under the GNU Lesser Restrictive License.
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