Calculator test

[Johnh]

While the achievements of HP, and the way these advanced functions were included more than 40 years ago must be celebrated, let's also acknowledge TI.

By May 1977, five years before the Hp15c, you could buy a TI-58 or TI59, with its Master ROM module included. TI58 had 490 steps (960 on a TI59) and 100 registers, and with the Module, it could deal with complex arithmetic, and complex maths functions including trig and natural log. The Master library also included solve, integrate and matrix operations.

I've long-ago parted with my old TI58, but I have the RCL-58 emulator on my phone, which also emulates the ROM module. Using module program ML-05 , I ran ln(-1), and got 0 + i.Pi to 10 significant figures!

Can anyone test this on a real TI58 or 59?

(in ML-05, key in -1 + i.0 by pressing 1 +/- A 0 A and then the natural log is engaged with 'A. Press x<>t to reveal the imaginary part.)