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FX-4000p Base-n problem


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#1 JeroenJ

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Posted 18 March 2021 - 10:22 AM

Hi! My first post here.

 

I have an issue with my recently acquired FX-4000p. It is in very nice shape, and everything seems to work well in Comp, SD, and LR modes, but not in Base-n mode.

 

When I enter a number (say 37) in decimal and subsequently switch to octal or binary view I get the expected 45 and 00100101, but hex view messes thing up -- I only get a row of eleven zeros. Switching back to dec, bin, or oct returns the proper number again.

 

After trying a little more in hex display it seems to me now that those zeros are leading zeros to the actual value, and that the 5 least significant numbers are not shown. So if I enter ABCDEFAB and press <EXE>, the display will show 00000000ABC. I cannot shift the display left or right, and calculations with the number shown give unusable results. Again, in dec, bin, oct everything works fine.

 

Is this a known bug or is the calculator simply defective? I haven't found anything mentioning this issue on line (yet).

 

Jeroen



#2 Hlib2

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Posted 18 March 2021 - 02:47 PM

@JeroenJ
If the maximum binary number in the calculator, for example, is 2^12-1 (b1111 1111 1111), then the hexadecimal number can not be greater than d4095. You may not enter hABCDEFAB.

#3 JeroenJ

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Posted 18 March 2021 - 03:22 PM

Good point! However, inputting such an unpermitted large number appears to be the only way I can get anything other than "00000000000" to appear on the display when working in hex.

 

Another example:

in hex, I enter FFFFF <EXE> (or anything lower than FFFFF)

display shows 00000000000

next, I enter 100000 <EXE>

display shows 00000000001

next, I enter 200000 <EXE>

display shows 00000000002



#4 pan.gejt

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Posted 18 March 2021 - 03:27 PM

Download user guide a see the page 43 and 44 on the document, not in pdf viewer

https://casio.ledudu...els/fx4000p.pdf

It seems you need to press "block" button + number of the block



#5 JeroenJ

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Posted 18 March 2021 - 03:35 PM

Thanks! I had already tried that, but it didn't help. The impression I get from the manual is that the block button is used for binary display only. Plus, the 'many zeros' problem does not occur in either decimal or octal display.

 

(edit: some typos)


Edited by JeroenJ, 18 March 2021 - 03:36 PM.


#6 pan.gejt

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Posted 18 March 2021 - 04:20 PM

Well, You are right, it seems it is for binary display only.






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