Cleaning and trying out a Casio FX-850P pocket computer 

Really cool machine. I have the FX-730P, which is an earlier model but has many of the same features. I enjoy programming in BASIC, it's such a simple language that anyone can learn it quickly.

Thanks a lot for the lovely demonstration. Got my very first computer FX-880P in 1990, still working fine, and this week I was able to buy an extra FX-850P. This is an incredible machine, it was even more on its launching time, around 1987.

So envious of the lad who had a Sharp equivelant of this at school.

I bought this one 30 years ago and pass my Baccalauréat with it. A great computer, still working as at the first day, I use it practically every day.

You sir are the hackers hacker. Just taught me how to use my Casio FX880P, also reading the manual now. Thank you!

The 'Guess the number game' is one of the first programs I try on a new computer as well.

I always forget how much I enjoy Godmode. Thank you for reminding me. x

I have it when I'm in high school. But now, this machine was dead, leaked screen... I don't know how to and where to fix it ... 😣😣 I'm really want to fix it to give to my daughter...

nice, you're inspired my to do the same with my PB-770, I've just bought it and need washing. Don't know whether is still ON.

I see you have a HD62002A03 CPU which is the same as the FX-880P. I have the same model as you. So this is probably from 1990 or 1991. According to Japanese forums, there are no information available about the HD62002. Some says it is very similar to the SC62015 architecture, available for Sharp PC-E500. Hope this helps.

In 1981 my schoolmate had one like that. Basic really was basic

Around 1990 I bought an FX-850P and got an expansion card for it. I figured out how to decode the library and can get to print out in readable format. The Basic is Casio basic.on steroids. variable names have a possibility of either.16 or.256 characters all significant. They are a sequence of alpha numeric characters with does not spell our a command name. The library uses lower case variable names. All common BASIC string commands are defiled, VAL, LEN, CHR$, STR$, LEFT$, RIGHTS, MIDS and others. the are special commands: VALF - takes a string representing.a math function and returns a numeric value. Invalid strings return 0. CALC$ - Holds the contents of function memory as a string. (not documented) CALCJMP - Cal mode only. Starts a function memory. (not documented) DEFCHR$(252, 253, 254, 255)="(HEX STRING) Defines a pixel pattern for a charctor of code 251, 252, 254 or 255. If not defined the characters.print as spaces. Used extensively by the library.(Undocumented.) It is possible to use DEFSEG and PEEK commands to programmatically read the.password. Using POKE is is possible to programmatically set or clear a password. To remove the password POKE it full of zeros.

You say the libraries are gosubable, does it mean one can create a program, to for example manipulate some data and then at some point call one of the library to have some calculation done by that library, then continue the program using the results of that library? Is that described in the manual? Have you seen this, how is it done? I'm have an 880p and I'd be interested to know, because I've always thought it was a weakness of it not to be able to built around the libraries. Maybe I was wrong.

The kind of dirt on this class of devices is often not really sweat but residue from heavy smoking.

I bought it in 1991. Due to years of neglect, the LED screen blacken. Anywhere to get it repaired as I really love this model?

Im pretty sure it's no good for the device to remove all batteries at the same time. Also there's a reset button (P) under the device which you're supposed to press before you turn it on after removing/replacing the batteries. I bet one of these or both caused the crash. I have the fx880p btw, first hand, still working perfectly.

Hello, would be you able to send me a copy of the library card? I recently purchased one, but the card that came with it in Spanish.

Thank you very much!

I have a CASIO FX880P and after sometime without using it I had to change the 2+1 batteries. After this change it worked normally for a day. Later, when I tried to load some programs via computer connection using the TF850 it ended up crashing. Turn it on but always displays only the letter N. Either of the two reset holes (P and All Reset) do not solve the problem. I wonder if the firmware got damaged! Do you have any clue how I can recover the calculator that has been with me for over 30 years?

Imaginary roots! Sweet!

Mine is no longer in a working condition. Bought it 30 years ago. I believe it is no longer available in the market.

Mine has already broken.. 😭😭