PX41CX

[toml_12953]

(10-29-2022 07:58 PM)agarza Wrote:  So, I really wanted the full functionality of the HP41CX for the PX DIY calculators.
But the ATMEGA328 has very limited memory (both flash and ram). Fortunately, there is a relatively new microcontroller from Microchip. Same physical size and thru hole (28 pins) but with lots of ram and flash.

So what's the advantage over the SwissMicros DM41X? (other than cost, of course.) It seems like the DM41X is a better choice if you want to add modules without reflashing the whole thing or if you want to print to an infrared printer.
Also, the DM41X is a portrait format, more like the original calculator.

Now if yours could interface with plotters, floppy drives, printers like the original, that would give it an edge over the SM version.