[A83] Re: lcd driver


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[A83] Re: lcd driver




Besides the size, do you really think it's that much cheaper?  I seem to
remember the 86 being around $120, and the 83 being $80 (when they first
came out), but there's got to be a lot more to it than the LCD.  I wouldn't
think the difference in price would be more than about $0.50 per unit.  Now,
I do realize that every penny you save on hardware amounts to a lot when you
are selling hundreds of thousands or millions of units, but I don't see it
being directly proportional to the increased price of the calc.

> An lcd driver is always used if you have an lcd. The difference is only
> how 
> you communicate with it.
> On the 83 you have to go via two dataports, on more expensive calcs, with 
> more advanced lcd drivers (85, 86, 89, 92) you can write to a special 
> memory segment that is dedicated to the lcd driver, where it automagically
> reads the image data.
> The difference is most probably only price. the 83 is supposed to be a 
> cheap calc, that most people can afford, and thus they choosed a simpler 
> cheaper lcd driver.
> the simpler lcd driver in the 83 also allows for a more simple hardware 
> design, making the design cost slightly lower too.




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