More TI Graphic Calculator Teardowns
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- Опубліковано 6 вер 2024
- In this video I examine the internal changes over 3 generations of TI graphing calculators - the TI-82/TI-85, TI-89 and the modern TI-84 Plus CE. Enjoy and I'll see you all in a few weeks after my fishing trip!
I still have my ti-80 that a friend of my dad brought me from USA in the '95. Since my English was almost not existing, I wrote a an actual letter to Texas instruments using a Spanish-English dictionary and a Typewriter asking where I can get a Spanish user manual. After some time I got a package from them with the user manual in Spanish shipped to Argentina. They won my heart with that.
"I was trying to convert cups to the speed of light." The sheer insanity of that statement is beautiful.
I came here just to laugh at the beauty of that statement. I love Ben Heck no homo.
lmao so true
It's 12.3336 cups per C, BTW.
I have answers to tons of your questions! The calculator does have OTG support! You're lucky you just got OS 5.4.0 installed, although you can't install any custom OS, you can still run Assembly games without issue! OS 5.6.0 that just got released banned ASM programs from being run. It also appears you got the latest hardware revision (revision O) which is 3x-4x faster than the original TI-84 Plus CEs. TI-OS UI hasn't changed much since the TI-82. Most of the menus layout are very similar. There's no emulation on the TI-84 Plus CE, it's definitely running right off of the eZ-80 CPU (NOT just Z-80). TI likely chose eZ-80 as the CPU because they could just port tons of their old code over without much fuss.
The only TI calculators that use ARM is the Nspire CX family.
Yes, those are charging docks, not very useful if you're not in a classroom though. I ended up using them to add wireless charging to the inside of my calculator :P
TI doesn't offer any 'repair service', if the calculator is broken they just send you a new one for free or make you pay for it.
That big chip is the ASIC which houses the eZ-80 CPU, RAM, USB controller and tons of other stuff. The 00 at the end means you have a TI-84 Plus CE non-Python Edition. I believe 01 means TI-83 Premium CE. You're right, the tiny one to the right is the FLASH. The bare contact below the FLASH is where the Python co-processor would go if you got a Python Edition calculator.
You seem pretty darn knowedgeable about this stuff, if you want to learn more or just look at calculator news you can look at cemetech.net or tiplanet.org . I do a ton of calculator things myself and I'm more than happy to answer any questions you have!
The "Aw screw it, I'll just break it" is a great moment in any project.
True fact: Ben quit Element 14 because they wouldn't let him pursue his off-Broadway ambitions.
I heard there going to be a new back to the future film. And Ben may have a part.
Ben: “They are cheap.”
2006 Undergrad Me: *Cries in TI-89 Titanium that I dropped and broke.*
Love these tear down videos! Now that I have more experience with an iron and know what I’m doing, I’m going to find my old calculator and resurrect it!
I remember overclocking my TI-85. The CPU is clocked with an RC circuit! It’s so damn cheap there isn’t a crystal. Replace C9 with a smaller capacitor. You can speed these up by about 300%
Also you should consider the release dates of the calculators. It went 80 81 85 82 83 92 86 89 84 IIRC
Yeah, I think that I may have done that as well. It also drained the batteries 300% faster!!! HAHAAHA! I think I had doom on that and some z80 os...or something...
Thanks for this post. First time I've heard of RC circuits being used as a clock source and it turns out that's actually possible.
there's also 2 83's: an 83, and an 83 plus
@@chuuisinsane TI-83, 83+, and then 84+, I think when they introduced the 84 they went straight to +. Though the 2014 edition seen in this video is basically a different calculator than the 2004(-ish) original.
Actually, it went 81, 85, 82, 80/92, 92 II/86/83, 73/92 Plus/89, 83 Plus, 83 Plus SE, Voyage 200, 73 Explorer, 84 Plus/Plus SE/89 Titanium. And that's just 1990 to 2004 Model numbers are so damn confusing Also, models are grouped by year; if there are more than one model, separated with a /, that means they were all released that same year. For context, the TI-80 and TI-92 were both released in 1995, and the TI-83 Plus debuted in 1999. Edit: Ended up misgrouping one or two models.
The TI-84 Plus series of calculators are an extension of the TI-83 Plus series which is why it reminds you so much of the 82.
yeah the JB-007-00 is an ASIC which includes the eZ80 clocked at 48mhz, 24bit address bus and RAM. On the Python version of this calculator at U01E (position on the board) the addition of the chip and surrounding components, a chip ATSAMD21E18A-U from home Atmel, bringing the 32-bit coprocessor ARM Cortex-M0 + clocked in 48 MHz dedicated to Python, along with 256 KB from memory Flash as well as 32 KB from memory SRAM
wikipedia.org/wiki/Zilog_eZ80
So does the eZ80 execute code from the quad SPI EEPROM?
@@BenHeckHacks I believe so. At least that's how I understand it with my limited knowledge. let me find the link to a product spec sheet from Zilog that I was reading
@@BenHeckHacks From what i have read on the spec sheet, the eZ80 has two Universal ZiLOG Interfaces (UZI) that contain 3 serial communication controller blocks (SPI, UART, and I
2C) along with
control registers and a Baud Rate Generator
(BRG), with only one of the serial devices is active at
any time. So I am going to say that it does do as you asked. The ZiLogs are located at Pin 67 to 74. With pin 66 as a ground and Pin 75 labeled as TEST
I'm just here for the singing 👍👏👏👏👏👏
Just discovers this channel, went looking thru the videos and this channel is almost as old as youtube. So congrats on the recent success. Interesting stuff.
Your singing is so good I think it deserves its own *exclusive* channel...
"Although... not every high school class required them like they do now"
LOL... back when I was in high school, there was a debate about whether we should be allowed to use calculators in study hall, let alone the classroom. Back when my TI-33 was SOTA.
in our school we could choose between 2 Casio models and 1 TI (that nobody actually bought) - it had to be the low tier models because any equation solving, text memory and graph plotting was not allowed- so you couldn't cheat with that....in the end we didn't use the calculators that much since most of the math we did was about variables and not about numbers... I personally mostly used it to confirm that stuff like 3x3 is actually 9 because I didn't trust myself...
Hahah. . . They were so confused by my HP-48GX. RPN for the win! 😁
Mmm, Field Programmable Gatorade is my favorite flavor!
The Ti 84+ CE uses the eZ80 which is fully backwards compatible with the Z80 but has a mode to extend the registers and address bus to 24 bits with a 24 bit ALU. It can address up to 16MB of memory and has modern peripherals (I2C, SPI, UARTS, GPIO) and Z80 style IO. Its a rather interesting chip. I am building a board around it as we speak
*Whole entire world on fire, death, doom and gloom*
*Ben Heck* "BUT CALCUTORS!"
I still remember your classic line from an old TBHS episode, I think the Apple Watch teardown, anyway it was: “Apple, we invented magnetism.” 🤣🤣🤣
I keep my ti 83 plus silver edition from high school on my computer desk as my go to calculator. It got battery damage which eventually caused buttons to stop working. (Had harbor freight free batteries in it) I threw it on my electronics bench to fix which is in my shed. It sat there for a few months before I got to it but by then the battery corrosion was too much. Bought another one on ebay with a bad screen for 10 bucks shipped. Pulled the ribbon cable for lcd screen off and soldered my own wires in place. Works great, and the case was immaculate, compared to my old one which was beat up from carrying it around in school.
I have a ti 89 titanium from school that I used as my go to when my 83 was broken. Just couldn't get use to it compared to the 83.
That's the best one they ever made; ti 83 plus silver edition it's faster and came with some games on it so it makes all the other ones seem boring.
Ben, do a TI-92!!! Wide body 3D graphing at its finest
Ti 92 plus 💪
I found 2 ti calculators one broken and one still working at a garage sale $5 for both,just some of the buttons where a little sticky took it apart cleaned it and works perfect...the only problem is I have no need for them they are just cool looking lol
I still have my TI-89 from when I was in high school back in the mid 00's. There were some badass games for the 89. It would be cool to see you do some kind of custom calculator mod video. I remember daydreaming in class about having a calculator that could download games wirelessly and send text messages lol.
You mean, a cell phone??
That's the exact scenario that makes University/college professors paranoid about allowing calculators.
@@wmoecke let me know when your math professor let's you pull out your cellphone for a test
You could add a song to that mess- "Ripley- Believe it or not!"
She's Sigorney Weaver, She's kinda hot
But here in Aliens, She's Ripley, believe it or not!
Google SNL James Cameron's Laser Cats
Someone get Bob Disney on the line, Aliens: The Musical can be Disney+'s next Hamilton
Bobs Burgers already did Alien the musical.
Search UA-cam for "Alien: The Play". You will be amazed.
I would LOVE to see what's inside a HP48! This one had such a great architecture for its time!
"a fashion company disguised as an electronics company" is the best way of describing apple i've ever heard
The 84+CSE is definitely still actually a Z80. The nSpire series is ARM-based, though.
The 84+ was an enhanced 83+ which in turn was a flash-based 83 which was an upgraded 82, which is why they all have OS similarities. I believe that might go back even further to the 81. I'm not sure how the 85 and 86 are related to the 81-84 series, as I never had either or hacked on them much.
According to datamath.org the only TI-8x calculators that didn't use a Z80-based CPU in some form were the TI-80 and the TI-89; Even the TI-73 used a Z80.
The Zilog eZ80 core in the TI84 Plus CE is NOT emulated, you seem to have an "M" or later hardware revision TI84+CE. The pre rev. "M" 84PCE's use parallel flash.
Ben please put a warning sign when you start to sing 😂I just felt my filling oscillate and my wine glasses broke 😂
I got so much info out of this video, thank you. Also really good singing
In high school about 18-20 years ago. My teacher had a clear ti calculator that worked on the overhead projector. I don't remember if it was a ti 81 or 82. Have you ever seen one?
My school has those too. I want to say they were TI-82s.
There was an overhead projector version of almost every calc from TI-81 on but the most widely used were used by teachers running the calculator curriculum excercises that were most often based on the 82, 83, 84, 84+, 84+CE lineage of calculators. What Ben didn’t say is that the current 84+CE keeps this ancient interface so that it remains compatible with all the teaching materials.
The clear ones were silver edition, I heard the 89's/Teacher's editions had plug-in's for projectors. Some of the clear silver editions are much faster and make the games like pac-man way harder to play.
Still have my TI-82 from 20+ years ago. You want to look at a wicked calculator? I've got a TI-NSpire. It's got a removable keypad that I assume holds the ROM package in it. You can pop in an TI-84 Plus keypad and turn it on and it works like a TI-84 (of course), and it comes with the NSpire keypad. Runs on an ARM9 processor.
Hey Ben, I have a TI N-Spire with the detachable keypads so it can swap between TI N-Spire and TI 84+ modes. It doesn't turn on anymore (Either battery corrosion killed it or it overheated in a non air conditioned house and fried something internal, or the screen is broken from a ding it has), but if you want to take a look at it and the keypads I can see about sending it your way.
At 22:20, you mention a connector, that's the viewscreen pads for the teacher version of the TI-89 which can be plugged into an overhead projector. Also, TI did make some TI-82s with mask-roms early on.
You're the Jack Black of electronics!
Hopefully I don't have to fight Dave Grohl :)
I'm pretty sure there were multiple revisions of the TI-85. The older ones have the model number printed in yellow, whereas yours has the model number in white. Its possible they cost-reduced some parts between the versions, but I don't really want to disassemble mine to find out.
Kinda pisses me off that TI’s newest calculator just threw all repairability out the window
For decades I've been wanting a TI-92 Plus, which is like a souped-up version of the TI-89 with a full QWERTY keyboard. Might be time to peruse eBay.
It can't be more than 2 decades.
I've been the proud owner of a 92 Plus for 5 years now. I still use it all the time and love it as much as the day I found it on Amazon for $40. In my final year of BSEE and it's been invaluable.
Your singing really brings tears to my eyes... 😝
11:08
Ben: "But it could be a custom gate array - um, not gatorade, gate array. This can be a gate array that..."
Transcripts: "But it could be a custom gatorade - um, not gate or raid, gate array. This can be a gatorade that..."
Hey Ben, you should have a look at the two-handed 3D graphing calculator from TI! I sadly forgot the number, though...😅😅
Very entertaining. I’m onboard for the Aliens musical. Would love to see a number about the line “who’s Snow White”
4:51 big capacitor ben. Great video. Thanks!
I have fond memories of my Ti-92+, which was basically a Ti-89 with a keyboard.
Have you seen the calculators of today? There's a French one that is open source and HP is making some good ones again.
Do you remember the 1970s TI-30 with LED display and how you could actually watch it think when it was working? My older brother had one of those, and of course I had to get one just like it when I could afford it later on.
I almost bought a TI-84 Plus CE for 25 USD at Goodwill, but someone already bought it. So I got a PS3 for 20 USD.
Most of us tore down our HP-48G's to install an extra SRAM chip & turn them into HP-48GX's. Such advanced .65mm pitch SOIC's.
Ooh TI-89... When I was in high school and college I used a TI Voyage 200 - basically a larger version of that TI-89 Titanium. (TI-89 was the downsize of TI-92 Plus, while TI-89 Titanium was the downsize of Voyage 200, and Voyage 200 is the evolution of TI-92 Plus and are actually partially binary compatible.)
Another great video Ben! It be cool to see what’s in a really old vintage TI calculator, like the ones with the VFD displays.
TI has been charging basically the same amount for their calculators since the 90's. LGR has made a video about how their hardware has gotten much cheaper to make yet their prices haven't gone down much if not at all.
the TI-80 while it may seem first from the name, it came out in 1995 as a cheaper lower cost calulator. it is the slowest TI graphing calculator and the only one with a proprietary ASIC that wansn't z80, 68k, or arm based. The original ti 89 is a traditional form factor version of the ti 92 series, and is allowed on more tests because it doesn't have a qwerty keyboard. The 89 Titanium is to the voyage 200 as the 89 is to the 92 series.
so thankful to be able to skip the singing bits... my ears will never recover
am i the only person who had a TI-92 with the full qwerty keyboard? My friend had the plus version too.
Came here for the TI tear-downs, stayed for the broadway music talent
it would be cool to put a Raspberry Pi or similar single board computer in one of these and find a way to interface with the keys.
I ended up gutting mine and stuffing a gameboy color into it and wiring the controls into the calculator keys duplicating the control the buttons for both left handed and right handed layouts.
The TI-84 CE is basically a color version of the TI-84 which is a faster and bigger memory version than the TI-83/83+/83+SE. The TI-85/86 should be thought of as a different subset if you wanna make more sense of the device family.
Ti-85, my calculator for my engineering degrees, still going strong.
The TI-89 is my favorite for programming using the editor built in and the TI-83 (not plus) is my 2nd fav due to nostalgia. I remember spending days and weeks making an intro for a Tetris game with pieces that fell into place to spell TETRIS. I had a different model TI-83 than the normal looking one. It had the same functionality but the screen was a greenish color over white instead of the black over white and the link port was on the side instead of the bottom. It also didn't have the smooth and shiny border around the screen. I bought it at Radio Shack for $89 in 2001 when I was 15 in the 9th grade.
always it's the "day X of quarantine"-meme... but i really think that ben would have lost his mind anyway :D
The Mac SE/30 (my fav of the all in one 80's macintosh line) got the 30 from the 68030.
Arm emulating z80 code? Maybe, but I wouldn't be surprised to find they used a Z80 to ARM source translator to produce ARM native code. Intel did that for the 8080-8086, and DEC even had an x86 to Alpha translator that worked directly on BINARY code!
TI's naming scheme is wonky but it makes more sense when you consider that the 82, 83, and 84 are all continuations of the original 81. The 85 was an upmarket calculator introduced between the 81 and 82, and the 86 was a refreshed version of the 85. At some point they must have figured out it made more sense to just keep rehashing the 81/82/83/84 series over and over again, because I distinctly remember textbooks being written with instructions for that series of calculator. Anyone with an 85/86/89 (or, god forbid, a Casio) had to figure it out on their own.
89s do unit conversions and symbolic algebra, so they are tools of the Devil as far as most math teachers were concerned, and the 85/86 and 89 cost more than the 82, so they weren’t popular with high school parents.
That chip on the first one that says T84C00 on it is the Z80. the Z80A is technically known as the Z8400.
Z8400 is the NMOS version, The Z84C00 is the low CMOS version which supports a low power sleep mode and static clock input. The T84C00 is Toshiba’s Z84C00 clone.
It was disappointing that a US company touting American made would use a Japanese version CPU. This was probably done because of the smaller SOIC packaging (and lower cost). These days Zilog is owned by Littelfuse Inc.
@@PebblesChan Maybe TI fabricated them for Toshiba? Stranger things have happened.
Toshiba have been making Z80 clones for decades. The Z84C15 IPC derivative sold by Zilog was designed by Toshiba.
That Aliens musical.... if you're ever on Second Life, stop by our Karaoke night and sing it, I think you'll blow a lot of people's minds.
I don't like the newer TI graphing calculators because it's very hard if not impossible to load your own assembly code. For me it's either the 89 or the 83/83+. Not too mention those are very cheap to buy second hand and are very durable.
I used to have a a few TI-84s I used in school. I made a program that solved equations for me, single variable. Teacher found out about it and made me delete it, said I would not learn anything with it.
You should disassemble the ti nspire cx ii. It has a 396 mhz arm m7, 64mb ram, and 90mb flash.
Regrettable acting's younger cousin, regrettable singing :)
Ti has their stelaris and TM4c series, the stelaris is what the Beaglebone black uses.
I love all these TI calculator video's.
Ben collects calculators
me I collect watches, I have 104 of them.......oopsie.
This is a very weird question, but I noticed you got a Pixel (2? right?). And so, I'm curious if you're still using a Google Pixel, new or old?
Make Doom run on the TI84 CE plus in colors, please
Normally I hate musicals, but if "Aliens" the musical came out, I would probably go watch it
The ti 82.... the hardware that launched so many variations and upgrades which is funny when you consider just how much more sophisticated the ti 85 and 92 were
Bought my Ti-85 for 110 US$ back when I needed it for my classes. In classroom we had school supplied Ti-82 so I went to Wallmart and saw both of them side by side. 85 was advertised on spot as better and faster of the two so I bought it instead the school standard Ti-82.
Fast forward 2 days later and I was returning the 85 because the pc-link port was not working (small 2.5mm stereo jack on bottom) And it was not "working" because I was trying to connect it and transfer school assignments from 82 to 85 and the two were not compatible at all. Not only you could not link those two with a supplied cable but even TI-basic programs were not compatible even if you retyped them from one calc to another by hand.
I figured this all out when I got my replacement Ti-85 the same day. Ooops. 0.o
Anyways, had that Ti-85 for a looong time after and I am pleasently surprised that the www.ticalc.org site is up and running and looking the same way it did in nineteens.
Ben, I would like to send you a working TI-nspire cx if you want it... thats if you don't already have one!! Lol
TI blast: My favorite flavor of Gatorade.
Is that a USB-Mini port? Looks like a proprietary port, which is completely expected for Texas Instruments.
Can't believe you didn't get a Ti83!
I only have the old TI-84+ which which was just a TI-83 upgrade model. :(
Life forms, you happy little life forms
I find it interesting that you can still get Ti 80 series calculators in America. All my friends here in Australia either used a Ti CAS series or a Casio Classpad in highschool (I used a CAS CX). I remember in a Year 10 Intro to Methods (Maths) class, my teacher started to bang a Ti CAS against the table because it wasn't working, bringing the calculator back to life again c:
TI has had “kickback” deals with school districts and standardized testing companies in the USA for decades now. They’ve managed to keep most things that aren’t TI-8x series calculators banned from testing and curricula.
Also, US teachers are so paranoid about cheating that the CAS calculators are seen as Satanic.
It's like I'm living inside a warped version of India Jones
I am trying to learn how to build things like the masks u made and in general learn how to work with circuits circuit boards and coding. How and where did you start? How do you recommend to start out and learn those things?
Yeah I hate the vanity hole on apple cases I prefer a solid case or a completely clear one.
Could you read the contents from the ROM of the TI-84 Plus CE? That would probably reveal what for what type of architecture the code was written.
Also, the singing was...well...intense :-)
0:54
"And then of course they'll never count past 10"
Well, that didn't age well ben
Thank you so much for this video 👍🏻👌🏻✌🏻
I think the 92 was the only other one with a 68000.. That's a weird and interesting one
TI hasnt made ARM chips in a while, the last one I remember was in the Galaxy Nexus in like 2011
Ben, I feel an intervention may be in order of you keep this up.
P.S. keep up the good work!
It be cool to see you take a TG16 mini amd make it portable
Most impressive thing I would like to see happen is :: Desolder a "Z80" and a few RAM chips, perhaps a display driver, etc., from these various vintages calculators, and design a brand NEW BOARD, preferably socketed, that creates a new calculating machine! Not sure of legality of re-using their ROM-routines; but I am certain something could be designed that would crunch numbres in some fashion. several different z80 chips receiving programs from different sources, allowed to run, and present their combined answer directly on a display, or something that could be sent to a Lprinter, PC, etc. That is truly the ultimate way to show your skill as an electronics engineer, CS nerd, etc. You have 6 months. Begin.
my ti 84 plus ce has this “rattling” sound after i dropped it . i don’t know what it is
"Nuke it from orbit" could probably have been produced by Sigue Sigue Sputnik". Martin Deville is still going... Ben, I think you have a chance at completing your Aliens musical!!
Lol @SLURM.
Country of Texas is an accurate statement
I believe there is a high school which had an Alien musical. I think Tested mentioned it when show Adam savage was showing costume he has that was used in it.
My og TI-82 decided to break right before a certification final test, had to rush to a store and buy a ng TI-82 stats, 65$! Ergonomics are so much worse, screen is flat and reflects the ceiling, it moves around the desk etc. Best guess its the ribbon cable of my og that is bad, going to replace it with single leads.
Apple is a jewelry company disguised as a tech company"
So true!
TI is able to keep this up because they give schools free stuff to build their curriculum around. Then the schools recommend the calculators that the curriculum is built around, so the students have to buy them. Also why they can say it is the #1 teacher recommended brand. Smart marketing but it is crappy for the consumer, especially when everyone has a device in their pocket that can do all the same stuff. That *does* make it a good time to colllect graphing calculators though.