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HP Forum Archive 21

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I have all of the original(?) graphing calculators
Message #1 Posted by Eddie W. Shore on 25 June 2012, 3:51 p.m.

TI-81 (Texas Instruments) - this was my first graphing calculator ever, purchased in 1991 Casio fx-7000GA (second version of the fx-7000G, but same function and bouncy keyboard) HP 28C - hard to do much with 1614 free bytes, 2/3rds of the memory of the TI-81! However, the algebratic and calculus functions more than make up for it.

      
Re: I have all of the original(?) graphing calculators
Message #2 Posted by x34 on 26 June 2012, 9:44 a.m.,
in response to message #1 by Eddie W. Shore

Do you have Elektronika MK-90?

            
Re: I have all of the original(?) graphing calculators
Message #3 Posted by Eddie W. Shore on 26 June 2012, 10:34 p.m.,
in response to message #2 by x34

No, not yet.

      
Re: I have all of the original(?) graphing calculators
Message #4 Posted by Luiz C. Vieira (Brazil) on 26 June 2012, 3:19 p.m.,
in response to message #1 by Eddie W. Shore

Hi.

I have always considered the HP42S as a graphic calculator because it allows individual pixel activation, although it does not have native plotting/graphing functions (must be programmed). Would it be a semi-graphic, perhaps? Anyway, it is the only Pioneer with graphic capabilities, am I correct?

About the Casio's: I owe one of each FX-7000G and FX-7000GA - both working units - and the visible differences are:

- [DEL] & [AC] keys are orange in the 7000G and red in the 7000GA;
- basic kbd background color is flat aluminum in the 7000G while having some gray and blue/green/black shading in the 7000GA;
- bottom keypad has keys mostly in black in the 7000G - except for [DEL], [AC] & [EXE], which is colored gray - while the 7000GA has all of them in gray - except for [DEL] & [AC].
- and I guess the most important of all: LCD is black-dot in the 7000G and blue-dot in the 7000GA (yep, the new one is blue-dot).

Apart of that, some few symbols have been rearranged and some others are printed in wilder form in the 7000GA, improving readability.

And yep: both eat battery juice in great quantities even when turned off, i.e., even when just keeping constant memory contents.

Cheers.

Luiz (Brazil)

Edited: 26 June 2012, 3:20 p.m.

            
Re: I have all of the original(?) graphing calculators
Message #5 Posted by Ángel Martin on 26 June 2012, 4:03 p.m.,
in response to message #4 by Luiz C. Vieira (Brazil)

Quote:
I have always considered the HP42S as a graphic calculator because it allows individual pixel activation,

Hi Luiz, I side with you on this one - may be hard but at least in theory itīs possible. I vaguely remember some 42S program that plotted some basic functions, but canīt remember well.

Stretching that idea I guess the i41CX emulator can also be considered some of a graphic calculator, since it controls the LCD segments independently - yes I know itīs pushing it but... itīs the 41 after all :-)

Cheers, ÁM

                  
Re: I have all of the original(?) graphing calculators
Message #6 Posted by Luiz C. Vieira (Brazil) on 26 June 2012, 4:11 p.m.,
in response to message #5 by Ángel Martin

Hi, Angel.

The original HP42S Owner's Manual lists at least two programs as examples of function plotting: one using only the calculator's LDC and another one using the IR output and an 82240 printer. The final printed plotting intends to show the differences between the HP41 plotting with the HP82143A and the HP42S with the HP82240. Not a fair fight for the earlier system...

Cheers.

Luiz (Brazil)

            
Re: I have all of the original(?) graphing calculators
Message #7 Posted by Palmer O. Hanson, Jr. on 28 June 2012, 9:38 p.m.,
in response to message #4 by Luiz C. Vieira (Brazil)

Quote:
And yep: both eat battery juice in great quantities even when turned off, i.e., even when just keeping constant memory contents.
Page vi of the manual says that batteries should be changed every two years even if the unit is not used for extended periods. Page 204 of the manual says that power consumption is 0.07 watts and battery life is approximately 120 hours. I assume that is for the operating condition.

I have three fx-7000G's. None of them are power hogs when turned off so far as I can tell. Typically the batteries last a year or more with the machine off.

I also have one fx-77000GBus which is a power hog when it is off. I don't know why it is so much worse than my fx-7000G's.

      
Re: I have all of the original(?) graphing calculators
Message #8 Posted by Didier Lachieze on 26 June 2012, 4:04 p.m.,
in response to message #1 by Eddie W. Shore

No Sharp EL-5200?

            
Re: I have all of the original(?) graphing calculators
Message #9 Posted by Eddie W. Shore on 26 June 2012, 10:35 p.m.,
in response to message #8 by Didier Lachieze

Quote:
No Sharp EL-5200?

Is that the one with the stylus?

                  
Re: I have all of the original(?) graphing calculators
Message #10 Posted by Didier Lachieze on 27 June 2012, 12:14 a.m.,
in response to message #9 by Eddie W. Shore

No, it's the first Sharp graphic, before the Sharp EL-9000. You can see a picture Here .

[Link edited]

Edited: 27 June 2012, 1:59 a.m. after one or more responses were posted

                        
Re: I have all of the original(?) graphing calculators
Message #11 Posted by Luiz C. Vieira (Brazil) on 27 June 2012, 1:27 a.m.,
in response to message #10 by Didier Lachieze

Hi.

It seems that this site does not accept hotlinks... or else one needs registration.

Cheers.

Luiz (Brazil)

                              
Re: I have all of the original(?) graphing calculators
Message #12 Posted by Didier Lachieze on 27 June 2012, 1:57 a.m.,
in response to message #11 by Luiz C. Vieira (Brazil)

I don't have such limitation to view the picture but anyway here is the link to the webpage where you'll find the picture: Sharp EL-5200

      
Re: I have all of the original(?) graphing calculators
Message #13 Posted by Palmer O. Hanson, Jr. on 28 June 2012, 9:45 p.m.,
in response to message #1 by Eddie W. Shore

The fx-7000G became available in late 1985. The HP-28C became available in early 1987. Did you realize that during 1986 Casio produced many other models such as the fx-6000G, fx-6500G, fx-7200G, fx-7400G and fx-8000G based on the information in Viktor Toth's site?

So the HP-28C wasn't the second graphic, but more like the seventh graphic, or even beyond that.

A more recent release was the Durabrand 828. Do you have one of those?

Edited: 29 June 2012, 1:03 a.m.


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