SwissMicros Calculator Forum

So far so good! Two-key rollover response feels much improved compared to 3.14. But I have another small bug report: you forgot to give this minor firmware update version number 3.142. ;) Surely it should be 3.141, so the next minor update can append a 9? This reminds me of the version numbering of...

Also, when rounding to an integer, the program adds 0.5 and takes the integer part. That's okay for positive values, but is incorrect for negative values. (IP truncates towards zero, not towards negative infinity.) Is it well known that ENTER FP + IP correctly rounds to the nearest integer, even fo...

Hard cases for storing portable 2.5 inch hard drives / SSDs are quite good, such as these ones by Inateck: https://www.amazon.co.uk/dp/B00L35UID0 https://images-na.ssl-images-amazon.com/images/I/717ouMlSEhL._SL1000_.jpg (I'm sure very similar cases are available with different brands.) The main down...

Also, when rounding to an integer, the program adds 0.5 and takes the integer part. That's okay for positive values, but is incorrect for negative values. (IP truncates towards zero, not towards negative infinity.)

I think the rtccalib.cfg value shown by the program possibly needs to be negated, or possibly the drift needs to be negated. I'm not sure which! On 2019-03-31 (beginning of EU summer time), I set the calculator to the correct time. On 2019-07-17 (108 days later), I noted my calculator had gained abo...

It's probably technically feasible on the DM42 from a hardware point of view (using the STM32's RTC alarm capabilities), but probably a lot of effort from a software point of view.

More WP43S emulator testing: On the current emulator version, 1. Complex entry comment: [RESET] 5 [CC] 1 [ENTER] does work and produces 5+i*1 [RESET] 5 [ENTER] 1 [CC] does not work. I would have expected the [CC] to take the X register while in entry mode. This would be convenient. [RESET] 5 [ENTER...

The encoder/decoder isn’t accepting my text files for encoding - only *.raw files for decoding. It doesn't support uploading program listings in text files, so you have to select and copy the text (e.g. from a text editor) and paste it into the "DM42 Listing" text box of the decoder/encod...

With something like a solver, the algorithm is everything. Whether you code it in assembly language, SysRPL, or C, is just an implementation detail. I bet the HP Solve algorithm has evolved since the 34C. It would be interesting to see the commented source code for the various implementations over ...

The solver and integrator are probably implemented in some pre-HP48 version of System RPL (SysRPL), or possibly Saturn assembly language for speed. ... I assume the basic procedures are older since they were implemented on HP-34C and -15C before the rise of RPL already. I don't think HP did redesig...