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Ti-84 Evo

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Re: Ti-84 Evo

#201

Post by xattt »

neuroelectron wrote: post #104
ndiddy wrote: post #86

From here: https://www.cemetech.net/news/2026/4/1062/_/ti-84-evo-calcul... > 3x Processing Power - Matching one of the speculated options, the calculator appears to use an ARM Cortex CPU, finally retiring the z80 and ez80 family of CPUs that were used in three decades of TI-83 and TI-84 Plus graphing calculators. It's running at 156MHz, compared to the 48MHz of the older calculators. It appears likely that in an unex…

Real shame since cortex has a admin TrustZone processor that is licensed to special interests only. For the educational market, this "security" is a selling point. It guarantees that a student isn't running unauthorized code or "cheating" apps. It also likely allows OTA auditing of the classroom's state.

There’s a discussion to be had on the absolutism of technology for decisions or security, and the slow erosion of a certain intangible “discretionary” element in day-to-day life.

Re: Ti-84 Evo

#202

Post by serf »

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.

My guess : the engineer got the older model

Reason : making due with more scarcity increased independence and critical thinking.

I don't know if that was your point...

Re: Ti-84 Evo

#203

Post by jasonfarnon »

billxreynolds wrote: post #165
cj wrote: post #91

Earlier quoted context omitted.

How is that possible? I wouldn’t have been able to function without it in school (20 years ago). But we also didn’t have iPhones.

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).

Re: Ti-84 Evo

#204

Post by cwel »

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.

Gonna guess you are the NEET

Re: Ti-84 Evo

#205

Post by nullsanity »

quacker wrote: post #176
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...…

Well, the TI-83/84 are called a graphing calculators for a reason: you can plot equations and datasets with them and look at them right there[1]. Looking at graphs is huge for learning, or at least it was for me, and school isn't just about plugging things in and getting an answer (or shouldn't be, at least). Doesn't mean it's not overpriced, but that's one reason and you can get a used TI-83/84 for like $30 or less.…

[dead]

Re: Ti-84 Evo

#206

Post by xbar »

aaronbrethorst wrote: post #2

$160 at Amazon: https://www.amazon.com/Texas-Instruments-TI84-TI-Calculator/... Not as bad as I would've expected. Also, apparently it includes a very simple Python environment? https://education.ti.com/en/product-resources/eguides/eguide...

It is an abysmal value. Your corner drugstore sells an AP/SAT approved calculator for $9 to $29.

I will buy one anyway because calculators remain a modest luxury that I want to indulge.

Re: Ti-84 Evo

#207

Post by ziofill »

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.

ooh good catch! it was a TI-83, got confused right there (it was before 2004)

Re: Ti-84 Evo

#208

Post by thaumasiotes »

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.

> I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+)

I had a TI-85 (maybe 86), unlike the entire rest of my school who had 83s.

There was a difference: when programming in TI-Basic, variable names on a TI-83 are limited to a single character. On the 85, you can make them longer.

But that was pretty much the only difference, and it will never come up if you're using the calculator for school-related reasons.

(For calculus, I had an 89. The differences are much more significant there.)

Re: Ti-84 Evo

#209

Post by duskwuff »

neuroelectron wrote: post #104
ndiddy wrote: post #86

From here: https://www.cemetech.net/news/2026/4/1062/_/ti-84-evo-calcul... > 3x Processing Power - Matching one of the speculated options, the calculator appears to use an ARM Cortex CPU, finally retiring the z80 and ez80 family of CPUs that were used in three decades of TI-83 and TI-84 Plus graphing calculators. It's running at 156MHz, compared to the 48MHz of the older calculators. It appears likely that in an unex…

Real shame since cortex has a admin TrustZone processor that is licensed to special interests only. For the educational market, this "security" is a selling point. It guarantees that a student isn't running unauthorized code or "cheating" apps. It also likely allows OTA auditing of the classroom's state.

> Real shame since cortex has a admin TrustZone processor that is licensed to special interests only.

This is substantially inaccurate.

1) Not all ARM Cortex series CPUs have TrustZone. It is absent on many Cortex-M microcontrollers, for example.

2) TrustZone is an operating mode of the CPU, not an "admin processor". Depending on the part, it is often made accessible to developers. (Whether that includes third-party software developers is, of course, up to the device manufacturer.)

For more information, see:

https://developer.arm.com/documentation/100690/0200/ARM-Trus...

Re: Ti-84 Evo

#210

Post by duskwuff »

j2kun wrote: post #197

Python programming with 156 MHz and 3.5 MiB of RAM? Can a Python REPL even start up with that profile?

3.5 MB is pretty generous, actually! Some older TI-84 models had MicroPython running on a secondary ATSAMD21 processor with 32 KB of RAM - that was effectively unusable.
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