DM-15L Swissmicros 2-line firmware V33

[@peternelson9259]

A test, to see if the DM15 honors Euler's Identity: e^𝒾π = -1 ??? [0] [ENTER] [g] [π] [f] [I] [e^x] ... yields -1, as expected, hurray! That's uppercase I (above the TAN key). The [f][I] stroke converts the y register value of 0 and the x register value of π into the complex number 0+π𝒾, and puts the calculator into complex mode, activating the (c) annunciator. Pressing [e^x] then computes e^𝒾π, which correctly returns -1. Press [g] [cf] [8] to exit complex mode.

[@dm319-j5y]

Yes, it's remarkable how broadly they implemented the complex handling on this calculator. The intersection of calculators that can do ln(-1) as well as cos(acos(π)) is pretty much just this calculator (ok, and some descendants).