First impressions on Casio FX-5800P

[CR Haeger]

Wow - quite a difference. The new one has "SUPER" and "PLUS" in its name with italic font to boot. It sticks out of pockets further too.

[Manolo Sobrino]

... and is also a much better calculator overall. 30 years separate both of them and everything has changed: those were the first iPhones, they had to look good. Now they have to be cheap. Despite that, with Casio you usually get things that work and a nice bang for the buck.

The most beautifully crafted calc I've seen from Casio (and maybe the rest) is the tiny FX 78, but I never enjoyed the early algebraic entry system so it rarely comes out of its box.

Marcus, the little information I've seen about it points to something proprietary over I2C. I have no idea really. Finding that you're looking into it is good news


BTW, super-fx used to mean extended trig and fraction range. They've been selling calcs with an occasional SUPER-FX in green italics for more than 20 years. They also use PLUS regularly, now for the restyling of their scientific ones. Casio don't hype really, but they like to put feature names on the faceplate... must be a Japanese thing.

[jebem]

(06-09-2014 11:42 PM)Manolo Sobrino Wrote:  The most beautifully crafted calc I've seen from Casio (and maybe the rest) is the tiny FX 78, but I never enjoyed the early algebraic entry system so it rarely comes out of its box.

The Casio brand has a place in my heart (my first calculator was a FX-31). They know how to do nice looking machines, like the FX-5000F for instance.

And what about this current FX-4500PA model?
Nice classic looks, despite being less powerful than the FX-5800P.
FX-4500PA

[xerxes]

Hello Manolo,

I've just read your post about the FX-5800P and noticed the significant speed difference of the n-queens benchmark.
To check if your FX-5800P is really slower than normal, I've tested the speed of 3 FX-5800Ps using SIGMA(X,X,1,10000)
with following results: 58, 60 and 62 seconds.

[Thomas Radtke]

(06-17-2014 07:58 AM)jebem Wrote:  And what about this current FX-4500PA model?

Dislikes: Legends are tiny and hard to read, no root solver, steep learning curve.

I got myself one several years ago, but quickly retired it.

[david sanz]

Just bought one of these yesterday. Just a couple of thoughts.

There is something that really annoys me. The lid locking buttom is so badly placed and protrudes so much that I accidentaly unlock the lid everytime I catch the machine.

Anti-slip rubber pads on the back would have been a nice addition also.

[Ask Mait]

Hi folks, I am a new member and it is my first post.
I 've been with Scientific calcs. for over 30 years and mostly they were fx-82s. Have been using 35s since 2009 and learning to use RPN was really a challenge.
Today, I am considering getting the fx-5800P, did most of the online research I could but still have at least three questions. Hoping somebody would take his time replying to.

1) is fx-5800P the latest and the best from Casio programming ? as I also saw fx-4500, 3650 and 50 on their website?
2) Comparing the keyboard of 5800 with those of fx-82 and even HP-35s, I could not find a dedicated key for sign change (+/-). This would be important key to me, does is it take long to do without it ?
3) the last-but-one key on the bottom right (-), what is it for?

I understand my queries could be foolish, my apologies and sincere thanks in advance.

Thanks
AJ

[Dieter]

(08-18-2016 07:36 PM)Ask Mait Wrote:  1) is fx-5800P the latest and the best from Casio programming ? as I also saw fx-4500, 3650 and 50 on their website?

I'd say this depends on your definition of "the best". ;-)

(08-18-2016 07:36 PM)Ask Mait Wrote:  2) Comparing the keyboard of 5800 with those of fx-82 and even HP-35s, I could not find a dedicated key for sign change (+/-). This would be important key to me, does is it take long to do without it ?
3) the last-but-one key on the bottom right (-), what is it for?

Looking at a picture of the 5800 I'd say the latter is the sign change key. But to be sure, you may simply download the manual from the Casio website.
Et voilà: yes, the one marked (–) indeed is the +/– key.

Dieter

[Thomas Radtke]

(04-19-2014 10:28 PM)Thomas Klemm Wrote:  From Calculator Speed Benchmark using the N-Queens Problem:

Quote: - 4:17 HP-35S Keystroke / RPN
- 4:08 HP-41CL Keystroke / RPN / Turbo5 Mode x4.3
- 4:02 HP-48GX UserRPL / Ver.P
- 3:47 FX-5800P Formula / Array
- 3:28 HP-42S Keystroke / RPN / Ver.C / Turbo + Fast Mode x3.5
- 3:15 DM-15CC Keystroke / RPN
- 28.7 FX-9860G Slim Formula / Matrix / OS 2.0
- 2.3 WP-34S Keystroke / RPN / Real Mode
- 0.346 HP-Prime Formula / List
- 0.000150 HP-50G Assembly / ARM9 @ 192 MHz / Fast Mode x2.7

Casio had the fastest calculators for decades, but I guess with todays inexpensive SoCs available (to everyone) this is history now.

[david sanz]

(08-18-2016 07:36 PM)Ask Mait Wrote:  Hi folks, I am a new member and it is my first post.
I 've been with Scientific calcs. for over 30 years and mostly they were fx-82s. Have been using 35s since 2009 and learning to use RPN was really a challenge.
Today, I am considering getting the fx-5800P, did most of the online research I could but still have at least three questions. Hoping somebody would take his time replying to.

1) is fx-5800P the latest and the best from Casio programming ? as I also saw fx-4500, 3650 and 50 on their website?
2) Comparing the keyboard of 5800 with those of fx-82 and even HP-35s, I could not find a dedicated key for sign change (+/-). This would be important key to me, does is it take long to do without it ?
3) the last-but-one key on the bottom right (-), what is it for?

I understand my queries could be foolish, my apologies and sincere thanks in advance.

Thanks
AJ

1) I do not know if it is the best. Seems to be the last development in the 3800P, 4800P series, plus it's got some similarities with 880P but it relies heavily on menus, the programming language seems to have been simplified and it lacks communication abilities and function library


3) It is the equivalent to +/-, but it is a little bit tricky

to enter a negative number you have to press (-) before keying the value
to change sign of your last result you press (-) and then EXE, it takes two keystrokes rather than just one


edit:

I have just found a surprising "feature" of this machine. It switches on "automaticly" if you drop it from a height of 2 or 3 centimeters, or if you knock its back

Another unpleasant finding. Apparently, there is no back up battery. When changing the battery, calculation history is lost and I suspect any programs would be lost as well.

[Ask Mait]

Wondering if the cover comes off or you can only fold it back.
Thanks

[Zaphod]

Quote:Program function
Matrix calculations
Differential and integration
Recursions
Solve function
Complex number calculations
Base-n calculations
Data transmission between two fx-5800P calculators
Differential and quadratic differential calculations
26 to 2398 variables
Fraction calculations
40 scientific constants
128 built-in formulas
Multi-replay function
Statistics (List-based Statistics, Standard deviation, Regression analysis)
Integrated hard case swings back a full 360 degrees.

Does that mean my program must have at least 26 variables ........?

[Manolo Sobrino]

(06-17-2014 01:12 PM)xerxes Wrote:  Hello Manolo,

I've just read your post about the FX-5800P and noticed the significant speed difference of the n-queens benchmark.
To check if your FX-5800P is really slower than normal, I've tested the speed of 3 FX-5800Ps using SIGMA(X,X,1,10000) with following results: 58, 60 and 62 seconds.

Xerxes, sorry about this truly embarrassing delay but I missed your question from 2014 (oops...)

It's 64s for the sum. And 4m 26s for your N-Queens program*, with fresh battery. These values make it 10-15% slower than your fastest one.

*I get that Deg is a workaround for the skip in Dsz Y, it's indeed faster than the alternatives I've tried.

(04-14-2018 04:23 PM)Ask Mait Wrote:  Wondering if the cover comes off or you can only fold it back.
Thanks

You can only fold it back. (But I've read a few complaints about its tendency to come off after dropping it.)

(04-14-2018 07:42 PM)Zaphod Wrote:  Does that mean my program must have at least 26 variables ........?

I was looking for an alternative listing of Xerxes's N-Queens program and found an old post of his on a Casio forum where he explains this succinctly:

Programming Capability Of Fx-5800p

[pier4r]

Thanks for the additional info!

For speed there is also a result for the summation trig/exp/root benchmark

http://www.hpmuseum.org/forum/thread-9750.html

I did not get a 5800P at 25€ from ebay. I preferred the 9860G series for a first impression. Those are not bad, but they are also quite limited as 3298 (a user) reported in other places in this forum. For example there is no way I can name a variable. Only A-Z .
This of course, without using other programming languages than the basic one (there is luaFX and C.Basic as possible extensions).

For small formulas/programs the 9860G is pretty good, so I would believe the 5800P would be on par, being even more compact.

I guess, though, that the 5800P is not usb powered, right?

[foroplus]

(04-19-2014 07:26 PM)Dave Britten Wrote:  On a related note, I just got an fx-8500g in the mail today. It's a quite peculiar mix of their first-gen models (fx-7000g) and pocket computers. It's also got one of the strangest text editors I've seen since vi. Pretty cool overall, but it's still annoying that there's no Print/Disp command that doesn't pause program execution. (Is the fx-5800p the same in that respect?)

From some point on Casio calculators implemented LOCATE command with you can print wherever you want data on the screen.
A great addition. FX-5800P have it.

[xerxes]

(04-15-2018 10:53 AM)Manolo Sobrino Wrote:  Xerxes, sorry about this truly embarrassing delay but I missed your question from 2014 (oops...)

It's 64s for the sum. And 4m 26s for your N-Queens program*, with fresh battery. These values make it 10-15% slower than your fastest one.

*I get that Deg is a workaround for the skip in Dsz Y, it's indeed faster than the alternatives I've tried.

Also sorry, because the same happend to me. I've overlooked you post 3 weeks ago.

Yes, the Deg is used as a NOP instruction in this case.

[Artur - Brasil]

Well, a bit delayed ... but this is a great calculator! A pit it does not use RPN logic, really!
Artur

[toml_12953]

(08-19-2016 08:16 AM)Thomas Radtke Wrote:  

(04-19-2014 10:28 PM)Thomas Klemm Wrote:  From Calculator Speed Benchmark using the N-Queens Problem:

Casio had the fastest calculators for decades, but I guess with todays inexpensive SoCs available (to everyone) this is history now.

The Casio fx-CG50 running the MicroPython version of the N-Queens program prints the answer as fast as you can press RUN.