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I have the opportunity to buy a 41 but the buyer as a doubt about the version. The front plate clearly shows 41CX but he’s not able to find any time functionalities.
So, what could be a ‘simple test’ to check the version?
Please keep in mind that I have to explain this to him without having a 41 myself !!!
The serial number of the calculator is 2350S40219.
Regards,
Francis
Posts: 4,027
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Hi;
one of the simplest tests to recognize the existence of the timer module is by pressing [SHIFT][ON] after having the calculator turnned on ([SHIFT] is the golden key, that activates the SHIFT indicator in the display). If it simply turns itself off after the [SHIFT][ON], then it is surely not an HP41CX or it has a bad time module. Also, try [SHIFT][CAT][2]. You should see:
[TIME FCN 2_ ] (the underscore represents the version indicator)
[CX TIME FCN ]
[EXT FCN 2_ ]
[CX EXT FCN ]
Any other HP41 (C or CV) will do nothing after CAT 2, unless it has a ROM module plugged in or, if hacked, an internally connected extra ROM.
Hope this helps.
Luiz (Brazil)
Edited: 23 Sept 2005, 5:05 p.m.
Posts: 53
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Catalog 2 (yellow shift - Enter - 2) will show the list of available functions. My CX displays:
-TIME 2C
-CX TIME
-EXT FCN 2D
-CX EXT FCN
Best regards
Peter
Posts: 237
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Hi Francis,
One way to find out if the 41 is a CX version is to do a catalog 2.
Shit Key (Gold Key)
Enter Key
2
This will run the system catalog for plugged in modules/devices. The CX funtions will show up as
-CX Time
-CX EXT Fcn
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Hi, Peter;
you are right. I don´t have my CX in hands right now, and the [TIME 2_ ] plus [CX TIME ] are the correct output messages.
Thanks.
Luiz (Brazil)
Posts: 237
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Joined: Mar 2006
Sorry about the misspellings. I hit the post button by mistake while trying to click on something else.
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Hi Francis.
You can try to view the CLOCK:
[ON]
[SHIFT] [ON]
Or try to display the current time:
[XEQ][ALPHA]t i m e [ALPHA]
DW
Posts: 883
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Joined: Feb 2006
You could have him clear the unit back to factory defaults with a simple proceedure.
- Turn the unit off
- Press and hold the backspace[clx a]
- Press and release ON
- Release the backspace
- MEMORY LOST appears
- Turn off and back on again to clear message
- Press PRGM
A CX will display 219 free registers, a C or CV will display 46 free. Not a conclusive test but sometimes worthwhile.
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There must be many ways to tell a cx from a cv with modules in it, but one extra-quick one should be to try the catalogs above catalog 3. The cx adds catalog 4 for files in extended memory, catalog 5 for alarms, and catalog 6 for key assignments. I think that if you try these on a c or cv, you'll just get catalog 3 (like you do if you try "catalog 7" on a cx).
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Many thanks to all of you guys...
That's exactly what I looked for...
Francis