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fx-9860gii-2 brief introduction
09-29-2019, 08:47 PM
Post: #1
fx-9860gii-2 brief introduction
In recent years, it has been repeatedly noted that new models of graphing calculators have
too much power consumption at a relatively slow computational speed unlike their classic predecessors from the 1990s.
https://comp.sys.hp48.narkive.com/Zq0obS...onsumption
https://www.hpmuseum.org/forum/thread-4856.html )
I purchased the fx-9860gii-2 (OS 2.09) to get to know a typical modern member of the CASIO family. It is equipped with the custom SH-4AL(SH7305) without FPU made for CASIO. The device is supplied with two cables: SB-62 and USB mini type A.
[Image: 28018037_m.jpg] [Image: 28018053_m.jpg]
http://images.vfl.ru/ii/1569786378/a9c84...018037.jpg
http://images.vfl.ru/ii/1569786412/1e9a7...018053.jpg
The Internet noticed the weaknesses of this model: in general it should be at least similar in speed (compared to older fx-9860g with SH-3), but it is not (due to a lot more bloated and badly optimized software). Also in the specification and on the back of the case stated: 0.7 W. All this I decided to check.
As for programming, interface, debugging, editing and mathematical capabilities - it brings together the best of all previous models. Some new features have been added: processing string variables, creating folders with files of different types, spreadsheet mode etc.
The unexpected surprise for me was the power consumption of this calculator (the measurements were carried out at a voltage of 5 V in the battery compartment and averaged over a time interval).
sleep mode (OFF) - I=30 µA
idle (cursor blinking) - I=1.5 mA (P~0.008W)
running program or graphing - I=19 mA (P~0.1W)
data send to/receive from flash 1.5 Mb memory - I=20 mA (P~0.1W)
scrolling text - 4 mA (P~0.02W)
scrolling list/matrix data - 8mA (P~0.04W)
The shut off point is 3.95 V.
Switching the backlight mode changes the perceived color of pixels from black to blue and adds to all measurements 7mA (P~0.04W). Summary: Pmax=0.15W.
The keyboard is made in the style of cheap financial calculators, but it does not cause complaints. These are first impressions of fx-9860gii-2.
[Image: 28018028_m.jpg] [Image: 28018034_m.jpg]
http://images.vfl.ru/ii/1569786300/19649...018028.jpg
http://images.vfl.ru/ii/1569786349/90148...018034.jpg
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09-30-2019, 05:14 AM
Post: #2
RE: fx-9860gii-2 brief introduction
Thanks for the review! I have the fx-9860GII-2 SD (includes an SD card slot) and am very happy with it.

Tom L

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09-30-2019, 09:27 AM
Post: #3
RE: fx-9860gii-2 brief introduction
I don’t know the calculator at all.
But the display seems to have a quite good contrast.

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09-30-2019, 11:31 AM
Post: #4
RE: fx-9860gii-2 brief introduction
I love the fx-9860G series. I just got a 9860GII SD last week, after finally finding a decent deal on one. I think the Slim is my favorite version, since it has the built-in help feature, is super tiny, and has just about the best rubber dome keyboard I've ever used on a calculator (the TI-85 gives it a close race).
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10-10-2019, 09:26 PM
Post: #5
RE: fx-9860gii-2 brief introduction
13 days this calculator was subjected to heavy testing. there are two minor bugs that few people will notice
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10-10-2019, 10:20 PM
Post: #6
RE: fx-9860gii-2 brief introduction
(10-10-2019 09:26 PM)Hlib Wrote:  13 days this calculator was subjected to heavy testing. there are two minor bugs that few people will notice

and those bugs are...?

Tom L

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10-10-2019, 10:25 PM
Post: #7
RE: fx-9860gii-2 brief introduction
(09-29-2019 08:47 PM)Hlib Wrote:  In recent years, it has been repeatedly noted that new models of graphing calculators have
too much power consumption at a relatively slow computational speed unlike their classic predecessors from the 1990s.
https://comp.sys.hp48.narkive.com/Zq0obS...onsumption
https://www.hpmuseum.org/forum/thread-4856.html )
I purchased the fx-9860gii-2 (OS 2.09) to get to know a typical modern member of the CASIO family. It is equipped with the custom SH-4AL(SH7305) without FPU made for CASIO. The device is supplied with two cables: SB-62 and USB mini type A.

I just bought an fx-CG50. It's Basic is very compatible with the 9860 and it also runs Micro Python. While the Basic is pretty fast, Python blows it away! The full color screen is easier on the eyes (IMHO) than the 9860. I still like my 9860 but the CG50 is my new toy. I keep discovering new things about it.

Tom L

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10-12-2019, 05:19 PM
Post: #8
RE: fx-9860gii-2 brief introduction
(10-10-2019 10:20 PM)toml_12953 Wrote:  and those bugs are...?
1) Under certain conditions, copying files 1...6 of lists from flash, the calculator sometimes ignores the command " Overwrite OK? No [F6]".
2) The program size is displayed only every 4 bytes : 4,8,12, ... 224, 228... etc
There are probably other bugs. But I`ve been using graphing calculators as interesting toys nowadays, I don`t go deep into them.
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