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Your dream calculator (maybe real sooner than you thought)

Started by DarkestEx, October 02, 2016, 10:15:18 pm

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DJ Omnimaga

Quote from: DarkestEx on February 05, 2017, 08:44:52 pm
Quote from: DJ Omnimaga on February 05, 2017, 08:01:02 pm
Aren't Classpad calcs prohibitively expensive, though? When I tried to build my calculator collection in 2009, the cheapest available ClassPad 300 and 300+ on Ebay were $310 in used condition without the instructions/cable/box... (three times what I paid my Clickpad Nspire with the 84+ keypad)

Bought a class pad in mint condition. Was fully working. Got it for 30€. However, the internals were all ripped out (except for the keypad PCB which is reused) to make space for the RPi and new Screen.
Ah I see. Personally I don't like destroying working calcs, but the thing is that the Classpad is so slow to do anything and banned at so many tests that it's not like many people probably want one anymore. Hopefully your project comes to fruition in the future, although if you ever decided to mass produce this calc then you would probably need to replace the Classpad case for public release.


DJ Omnimaga

They must be much faster. There aren't many of those programs, though, since the calculators were not very popular. It's the BASIC interpreter that was poorly implemented.

Krillan

Some time ago I read from a sh 4 cpu in the cp 400 which runs with about 50 or 60 mhz, switched to the half frequency that it could run.

Quote from: DJ Omnimaga on March 01, 2017, 11:20:39 pm
They must be much faster. There aren't many of those programs, though, since the calculators were not very popular. It's the BASIC interpreter that was poorly implemented.

Krillan

Hm, sorry that I say it, but... getting a cheap thing with a good dsiplay, a cpu with about some 100 mhz cycle and enough ram let's me thin at an older smartphone. Ok, building your own machine is a nice training in hard- and software, ok. But all thights I had about building a tablet with raspberry 3 or anything like this did lead me to used tablets at the bay... sorry about this sacrilegic words...

c4ooo

You should use the edit button to modify your post instead of posting twice in a row ;)

DJ Omnimaga

Quote from: Krillan on March 02, 2017, 02:49:15 am
Hm, sorry that I say it, but... getting a cheap thing with a good dsiplay, a cpu with about some 100 mhz cycle and enough ram let's me thin at an older smartphone. Ok, building your own machine is a nice training in hard- and software, ok. But all thights I had about building a tablet with raspberry 3 or anything like this did lead me to used tablets at the bay... sorry about this sacrilegic words...
I think his goal is to build an actual calculator. :P

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