Review: TI66

09262019, 11:43 AM
Post: #1




Review: TI66
http://edspi31415.blogspot.com/2019/09/r...ti66.html
Company: Texas Instruments Years in Production: 1982 to 1985 Original Price: I estimate the original price to be from $70 to $100 Battery: 2 x LR44 or 2 x AR76 Type: Scientific, Keystroke Programmable Operating System: AOS Number of Digits: 10 Memory: 512 steps, which can be allocated to a maximum of 64 memory registers Accessories: Carrying Case, PC200 Printer The TI66 was slated to be the next generation of the TI58C of 1978. Virtually the keyboard design and commands of the TI58C are present in the TI66, but there are some differences: * The TI66 is an landscape form with a gray keyboard, where as the TI58C (and the related TI58 and TI59 has a black keyboard). * The TI66 lacks a card reader. * The TI66 also lacked a slot for modules. * However, the TI66 runs on coin batteries (AR76 or LR44), which can be found easily. The TI58C family had rechargeable battery packs, which cannot be easily purchased (few vendors sell them online). * In learn mode, when a step is registered, the TI66 displays the key you just pressed with its mnemonic. 

09262019, 02:18 PM
Post: #2




RE: Review: TI66
Thanks for the review, Eddie.
As a collector point of view, this is one of my preferred Texas machines. It may be slow, but it saves energy and the battery last for many years. My take centered on the hardware side of things: https://www.hpmuseum.org/forum/thread28...l#pid24536 Jose Mesquita RadioMuseum.org member 

09292019, 07:03 AM
Post: #3




RE: Review: TI66
This reminded me of the TI65 "Technical Analyst" (amazing name for a calculator, I think). One of TI's programmables which came with lots of features geared toward STEM work. I found the selection of physical constants interesting.
Curiously, it lacked hyperbolic functions so I tried programming in some using the exponential function. Took the machine couple seconds to chug them out, haha. 

09292019, 03:36 PM
Post: #4




RE: Review: TI66
Jebem,
I enjoy your tear down posts of calculators. Benjer, I don't know why TI only had 100 steps for the TI65, it could have been the successor in the TI58 family. I love the 65's carrying case. Eddie 

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