Presenting your collection of non HP calculators, is anyone interested of that?

[Valentin Albillo]

.
Hi, all,

One of my favourite non-HP, non-SHARP models:





This is my CASIO fx-7500G, a most awesome scientific programmable graphic calculator released in 1989. To begin with, it's extremely small, a 140-gram version of the CASIO fx-7000G but with a foldable design which fits most any pocket and about 6 times more RAM (4 Kb), which provides for 26 fixed memories and 4,006 program steps, convertible to up to 500 additional memories for a gran total of 526 memories. Its dual keyboards house 59 keys, and it features 96x64 dot-addressable graphics displayed in a monochromatic LCD screen. It runs on 3 CR-2025 cells which provide about 2 months of typical use (0.06 W).

The function set consists of 195 functions including hyperbolics, factorial, decimal-sexagesimal conversions, binary-octal-hexadecimal conversions and arithmetic, coordinate transformations, random numbers, full statistics with means and standard deviations, linear regression with correlation coefficient and estimations, all of them computed internally with 13-digit mantissas and capable of holding up to 8 pending operands and 20 pending operations while evaluating expressions. As for the graphic capabilites, it supports 20 types of built-in function graphs plus user-generated functions and statistical graphs (bar and line graphs, normal distribution, linear regressions, etc). It can also read back the coordinates at any selected point.

To top it all, it comes with a big, excellent manual which covers about everything in comprehensive detail and includes a number of useful programs for it, including graphics ones and even blank sheets for your own programs. Finally, it's very fast, about 4x faster than the HP-71B or the HP-42S and, on the programming side, its decent programming capabilities (which includes labels, indirection, loops, 9 levels of subroutines and up to 10 program spaces with edition and debugging capabilities) and 4-line alphanumeric screen make it easy to write non-trivial programs on it, such as the 31-step Mandelbrot-rendering program you can find in the web. All in all, a real jewel.

V.