TI-81 - Texas Instruments' first graphing calculator

[@jasonfullerton7763]

i lost mine somewhere along the way, but I got it in 1991 for AP Calculus and used it to get a BS Engineering. best feature: a 3x5 index card fit perfectly inside the cover.

[@Chrls5]

wow! i've never seen this one, thanks for sharing, love your collection of calculators!

[@keyboard_g]

Would love an in-depth look at the TI-85. I read that it was more powerful and designed for engineers, but never what exactly is different.

[@CalculatorCulture]

Yeah, the TI-85/86 is on my list.

[@keyboard_g]

@@CalculatorCulture Awesome, thanks!

[@tr1p1ea]

Hardware wise it is actually pretty similar to the 81 with some key advancements, such as more memory, a larger LCD and particularly link capability.

[@chef1arjunaidi]

Good video, thanks. TI graphing calculator tech seems to be stuck in the TI-81 roots. I like the TI-89 Titanium, it is a capable CAS calculator. The new Nspire seems to be an overkill and tries too hard to be like a computer

[@laurenth7187]

In all TI calculators until the motorola CPU, the TI Basic is lacking the SUB routines and the DF FN (user defined functions)...

[@Vince-jk5my]

Can ASM programming still be done on TI calculators? Can I also program in C/C++? If so, which calculator would you recommend? I have a TI-89 Titanium, but I'm also looking into buying an old school TI calculator, like the 81, 82, 85, 86, etc. Which among those would you recommend? Thanks!

[@CalculatorCulture]

ASM isn't officially support on modern TI calculators, since Texas Instruments are worried about exam cheats. You can write ASM and C/C++ programs for TI-Nspire calculators using Ndless. As for ASM on old school TI calculators, I'd recommend getting a TI-86. There are some great resources on Z80 asm programming and game development on jgmalcolm.com/z80/, and www.ticalc.org/programming/columns/86-asm/el-helw/lesson1.html. You'll also need a link cable - see www.ticalc.org/hardware/cables/.

[@EdouardTavinor]

this was the calculator that replaced my casio fx7000g because i wanted more memory :) though i'm surprised you say that it only has 2k. maybe there were variants for different markets? unfortunately when i went to university the calculator didn't come with me :(

[@gobyg-major2057]

Parametric and functional isn’t the same thing. Functional is y(x) and parametric is x(t) and y(t).....

[@gobyg-major2057]

3 years later than 1985 would be 1988, earlier would be 1982. And 1985 is 6 years before 1991 not 5.....