CASIO fx-4100P Scientific Calculator from 1991

[jebem]

Another small pocket programmable scientific calculator from CASIO.
This one was assembled after 1991 week 14, according to the SoC date code.




Japanese industrial design with attention to detail.
Color reverse painting labeling, like Japanese used to do on pocket transistor radios from the 60's and 70's, many of them manufactured to be sold with American branding.




Opening the case is done by undoing five small screws.
To remove the case I had to use a plastic pry tool to release the lateral latches before lifting the bottom side in order to be able to slide it down to release the top side.




Unusual CASIO choice of a SoC from Toshiba, T9949A, 9114H, Japan.
Same remark for the large back cover copper shield, absent on most of CASIO machines from these series and era.




While I prefer the independent plastic keys approach like used in the fx-3600P, this rubber membrane key set is working fine and the labeling is resistant to wear; even after a vigorous cleaning with hand dish wash detergent in warm water, it retained the full paint and color.

[Chasfield]

I have an FX7000G from Casio's rubber membrane keyboard era. I think they subsequently regretted this cost saving design rationalisation. I seem to remember Casio, and their competitors, being at pains to point out the presence of hard plastic keys in the box artwork of subsequent products.

All the same, they were well built and durable calculators.

[ElectroDuende]

(11-20-2015 06:36 PM)jebem Wrote:  Another small pocket programmable scientific calculator from CASIO.
This one was assembled after 1991 week 14, according to the SoC date code.

Those pictures brought some memories on me... so I did a new thread!

http://www.hpmuseum.org/forum/thread-5243.html

[factor]

The condition looks very good! There should be one of this model in my old home, but should long be out of order now unfortunately..

At school long time ago we were playing all day with the secret keying sequence to make this calc capable to input all 26 alphabets.. those were the days.

[wyattwong]

There is bug in Casio fx-4100P which allow input of A-Z !

[Eddie W. Shore]

The fx-4100p looks familiar to the fx-4500p (I have Radio Shack version EC-4026).

[Csaba Tizedes]

(02-12-2017 09:05 AM)wyattwong Wrote:  There is bug in Casio fx-4100P which allow input of A-Z !

That is means that you can use more than eight (8) variables in a single equation?! I have only 4200P and I can remember on 4200P you can use only eight.

Csaba

[wyattwong]

(02-18-2017 08:57 AM)Csaba Tizedes Wrote:  

(02-12-2017 09:05 AM)wyattwong Wrote:  There is bug in Casio fx-4100P which allow input of A-Z !

That is means that you can use more than eight (8) variables in a single equation?! I have only 4200P and I can remember on 4200P you can use only eight.

Csaba

No. That means after entering a specific sequences of keystrokes, you can NOT only input the alphabets A, B, C, D, E, F but also alphabets G, H, I, J, …., Z.