[TI-H] Re: Building your own calculator


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[TI-H] Re: Building your own calculator





I think that what you essentially should do is 
building a simple embedded system.

in basics this is composed of a microprocessor, a memory unit, a rom unit, 
keyboard input and display output.

Combining the cpu, memory and rom shouldn't be too hard, but I think designing
the keyboard input, and display output can pose a challenge.

I think your best shot would be to use something like a serial 
terminal for IO first, (would ofcourse require a serial interface chip, and the
know-how/design/time to connect it) and after that trying to build 
the interface for the keyboard (maybe a pc keyboard interface), and output,
(making a conversion to an existing display unit seems the logical thing 
to do....) 

Not that this all requires experience in designing interconnections between 
chips, and realising them, so it you don't have much practice, you might want 
to make some home projects first, like building a comparator with NANDS only, 
or an interface to make leds flash in a sequence controlled by the serial 
port...


I think that with enough time, patience, end resources it could be done..
(Although I'm not the one to try it... i'm just starting with PIC's)

--Peter-Martijn

> 
> Later,
> 
> -- 
> David Phillips <david@acz.org>
> http://david.acz.org/
> 
> 





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