Author Topic: [new_calc] New Calc project ... with cas engine /!\  (Read 45201 times)

0 Members and 1 Guest are viewing this topic.

Offline Nick

  • LV9 Veteran (Next: 1337)
  • *********
  • Posts: 1166
  • Rating: +161/-3
  • You just got omnom'd
    • View Profile
    • Nick Steen
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #165 on: February 18, 2013, 03:32:28 am »
here are some:
http://www.newhavendisplay.com/tfts-c-1.html

and more specifically this one might be interesting:
http://www.newhavendisplay.com/nhd57640480wfctxlt-nonstocked-50pc-moq-p-4304.html
5.7" of colorful iny tiny lights :)

Offline Lancelot_du_lac

  • LV3 Member (Next: 100)
  • ***
  • Posts: 53
  • Rating: +3/-0
    • View Profile
    • LI-Systems
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #166 on: February 21, 2013, 12:49:37 am »
Size: 5.7" Diagonal - 640 x 480 (8-Bit)

&

$116.00

the 7" 800x600 i found is much lower priced. ( around 30$ )

Offline _Nicco_

  • LV4 Regular (Next: 200)
  • ****
  • Posts: 173
  • Rating: +6/-0
    • View Profile
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #167 on: February 21, 2013, 01:32:51 am »
Makes no sense to have a smaller screen but a higher price.
They say that your signature is supposed to go here...

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55941
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #168 on: February 21, 2013, 04:10:02 am »
I think it's due to offer and demand. Maybe those screens are just so rare but still a bit in demand that it raises the price. Just see how expensive a factory-sealed copy of Chrono Trigger for the SNES is on Ebay.

This is why PCI cards were more expensive than PCI-E ones in their final days.
« Last Edit: February 21, 2013, 04:10:49 am by DJ_O »
Dream of Omnimaga

Offline Lancelot_du_lac

  • LV3 Member (Next: 100)
  • ***
  • Posts: 53
  • Rating: +3/-0
    • View Profile
    • LI-Systems
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #169 on: February 24, 2013, 05:13:12 am »
I'm working on basic calc engine with a no limit of precision. It's working good for moment, i can mul add sub until now without error.

Why re-write simple op like add ? Just because adder are limited by size of the physical adder. i'm writing a code that can add unlimited size of number. And the number is auto-sized to the minimal size needed.

In case of irrational number there is tips for detect and stop the size. And i'm gonna use a smarter approach.

i work mostly the wednesday morning, so next time i aim to code divide.
My basic engine aim to be able (8^3)! without bug and don't do an approx like wolfram, but do the real calc.
the code is C++, is writed for console check in visual studio 2012, all the code is able to be compiled by gcc++.
So aimed to be portable for any CPU & OS.

I'm not working for optimisation now, just working & check working with asserts and visual inspections.

My forum is down, because i did a mistake on the server so until i fix it, it's normal. And as nobody help, this is not very important that the forum come back very soon. so when i have time to install apache again.

So code is growing ...
« Last Edit: February 24, 2013, 05:14:44 am by Lancelot_du_lac »

Offline Lancelot_du_lac

  • LV3 Member (Next: 100)
  • ***
  • Posts: 53
  • Rating: +3/-0
    • View Profile
    • LI-Systems
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #170 on: March 06, 2013, 06:40:16 am »
divide is finished & working fine.

Offline Lancelot_du_lac

  • LV3 Member (Next: 100)
  • ***
  • Posts: 53
  • Rating: +3/-0
    • View Profile
    • LI-Systems
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #171 on: March 14, 2013, 01:48:33 am »
ok now the systems is working with multiples Atoms, so i've done a test on 199! and it's clearly the good answer.

now i'm gonna integrate Xint to do random asserts to be sure that truely working.


@+

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55941
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #172 on: March 14, 2013, 01:55:39 am »
Good to hear :)
Dream of Omnimaga

Offline Nosferatu Arucard 1983

  • LV2 Member (Next: 40)
  • **
  • Posts: 28
  • Rating: +6/-0
    • View Profile
Re: [new_calc] New Calc project ... with cas engine /!\
« Reply #173 on: June 02, 2013, 12:55:03 pm »
Building a CAS from scratch is a very hard task, but in my place I just port the Maxima or any well tested CAS. Afterwall I agreed in your choice to use Linux as a core operating system of your prototype, but if it will be a open calculator, then any official repository should have the Maxima as an alternative CAS engine.
One of the big mistakes in any retail calculator CAS in market is the unability to evaluate contour integrals, residues of functions or addicional special functions used in engeneering courses.
I hope will add this functions someday.