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Ti-84 Evo

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Re: Ti-84 Evo

#301

Post by deckar01 »

sosborn wrote: post #29
Yossarrian22 wrote: post #6

Ti really needs to stop with the artificial product differentiation. There's no reason 15 years after the Nspire CX CAS came out that everyone of their calculators can't do CAS.

CAS capabilities are prohibited in the SAT: https://satsuite.collegeboard.org/sat/what-to-bring-do/calcu...

They let you write python programs as long as it’s from memory though. I wonder what the code golf looks like for a rudimentary python CAS. If you could evaluate the equation without needing to parse it, I bet you could get a lot of mileage out of a black box gradient decent routine. The analog circuit solver I wrote for my nSpire (without CAS) was ~11kB. https://github.com/deckar01/pylacc

Re: Ti-84 Evo

#302

Post by theodric »

jasonfarnon wrote: post #203
billxreynolds wrote: post #165

Earlier quoted context omitted.

Back in the mid-90's we had a TI version of sneakernet where you would copy programs from one student on to your TI-85 via a link cable; this is how I got Tetris back in the day. I assume OP did the same.

Was it that only the 85 could connect to a com port, but then you could connect the 85 to the 82/83? I seem to remember pleading with the one kid with an 85 (who didn't even care about games).

I chopped my TI-83 link cable in half and wired it to the parallel port, like this: http://www1.inf.tu-dresden.de/~aw4/ti85.html

and this: https://web.archive.org/web/19990117001444/http://www.geocit...

Re: Ti-84 Evo

#303

Post by z2 »

BoorishBears wrote: post #164
hatsunearu wrote: post #65

Earlier quoted context omitted.

Wow, they used to be allowed back when I was in high school. It came in super clutch for SAT but much more importantly AP. Our school mandated the original CS CAS and drilled us on how to use it effectively and I got good mileage out of it through high school testing and college. I lost it at some point and got the version 2 and I would occasionally use it for work. I wish it had USB-C because who has a mini-B cable…

I vaguely remember they were banned by a proxy that stopped working after the Ti-89 came out: no QWERTY keyboards Originally that blocked the Ti-92, but then the Ti-89 and Nspire line had numeric keypads + CAS

Ah yes, I had a 89 Titanium (bought with the funds from a math prize) that felt like sanctioned cheating for College Board exams. The year I took the AP physics test, there was a surreally difficult integral or differential equation that I owed completely to the calculator. I never did as well in math competitions since getting that thing, but no regrets.

Re: Ti-84 Evo

#304

Post by jacobolus »

kstrauser wrote: post #292
Dwedit wrote: post #286

Earlier quoted context omitted.

The order was: TI-81 (1990) TI-85 (1992) TI-82 (1993) TI-80 (1995) TI-92 (1995) TI-83 (1996) TI-86 (1996) TI-73 (1998) TI-83 Plus (1999) TI-89 (1998) TI-92 Plus (1998) TI-83 Plus Silver Edition (2001) TI-84 Plus (2004) TI-84 Plus Silver Edition (2004)

Anyone here have an idea why the models jumped around like that? Like why'd the 82 come out after the 85, or the 83 after the 92?

They had different models with different capabilities. As they made minor style changes, they bumped the numbers slightly. The 81–82–83–84 were basically the same concept, as were the 85–86. The 89 and 92 were higher-end models. The 80 and 73 are simpler models intended for middle school.

All of them are basically a multi-generational scam perpetrated against the hapless parents of American high school students who were told that they needed to buy overpriced anachronistic calculators for their kids to succeed in school. In my opinion the calculators have overall caused more pedagogical harm than benefit; the students would be better served by some combination of (a) problems that can be solved without the tedious but trivial numerical calculations these calculators support, or (b) are solved using a real programming language. If someone really wants to assign simple numerical problems, give the kids slide rules.

Calculators of this type used to make sense for an engineer doing work in the field somewhere, but make no sense in the context of a classroom.

Re: Ti-84 Evo

#305

Post by jedimastert »

kristopolous wrote: post #62

Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS https://www.usaofficemachines.com/csofx300ms-fx-300ms-scient... There's even knockoffs of it for $1: https://www.aliexpress.us/item/3256809744184708.html I picked one up when the 99 cent store was shutting down. It works fine. Look what you can get for $20: https://www.casio.com/intl/scientific-calculators/product.FX...…

I'm personally a fan of the ti-30xs. Still cheap and a good number of features for looking at data

Re: Ti-84 Evo

#306

Post by fsckboy »

59percentmore wrote: post #178
ziofill wrote: post #153

About 25 years ago my parents got me a Ti84 as a surprise for Christmas and they hid it in the attic so I couldn't find it in the meantime. A few months went by and a couple days before Christmas, when it was time to wrap the presents they couldn't find it anymore. My dad went out and got a Casio something as a late minute replacement, and that was the calculator I used in high school and I never knew about this stor…

Must have been closer to 20 years, 84(+) didn't come out until 2004. Gonna be pedantic/crotchety about this because I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+). Guess who's the engineer now, and who's the NEET? Your kids pay attention to what (who) you value, folks.

had to search that, NEET is India's National Eligibility cum Entrance Test.

No, I was too scared to ask.

Re: Ti-84 Evo

#307

Post by squeaky-clean »

kstrauser wrote: post #218
charcircuit wrote: post #188

Earlier quoted context omitted.

You could get that same educational value from programming things on a smartphone.

What's your favorite free programming environment for commonly used smartphones?

I like Codea for iOS, though the free version has a soft-limit at 500 lines. If a project gets bigger than 500 lines you can still run code but it'll nag you to upgrade.

Re: Ti-84 Evo

#308

Post by jordanb »

kstrauser wrote: post #292
Dwedit wrote: post #286

Earlier quoted context omitted.

The order was: TI-81 (1990) TI-85 (1992) TI-82 (1993) TI-80 (1995) TI-92 (1995) TI-83 (1996) TI-86 (1996) TI-73 (1998) TI-83 Plus (1999) TI-89 (1998) TI-92 Plus (1998) TI-83 Plus Silver Edition (2001) TI-84 Plus (2004) TI-84 Plus Silver Edition (2004)

Anyone here have an idea why the models jumped around like that? Like why'd the 82 come out after the 85, or the 83 after the 92?

A lot of it had to do with capability. The TI 92 was considerably more capable than the 83. The 89 had better software than the 92 but with a smaller form factor. The 92+ was the 92 with the 89 software.

Re: Ti-84 Evo

#309

Post by FarmerPotato »

Dwedit wrote: post #286
racl101 wrote: post #278

Earlier quoted context omitted.

They had TI-85's in late '90s? I remember there only being TI-83s.

The order was: TI-81 (1990) TI-85 (1992) TI-82 (1993) TI-80 (1995) TI-92 (1995) TI-83 (1996) TI-86 (1996) TI-73 (1998) TI-83 Plus (1999) TI-89 (1998) TI-92 Plus (1998) TI-83 Plus Silver Edition (2001) TI-84 Plus (2004) TI-84 Plus Silver Edition (2004)

The encyclopedia of TI calculators is http://www.datamath.org

Joerg Warner has been collecting them exhaustively, and peering inside for date codes and such.

Re: Ti-84 Evo

#310

Post by jacobolus »

fsckboy wrote: post #306
59percentmore wrote: post #178

Earlier quoted context omitted.

Must have been closer to 20 years, 84(+) didn't come out until 2004. Gonna be pedantic/crotchety about this because I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+). Guess who's the engineer now, and who's the NEET? Your kids pay attention to what (who) you value, folks.

had to search that, NEET is India's National Eligibility cum Entrance Test. No, I was too scared to ask.

NEET means "Not in Education, Employment, or Training". The stereotype is an unemployed young adult living with their parents and playing video games all day.
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