HP Forum Archive 15

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Recognizing HP 41 model (C, CV or CX) Message #1 Posted by Francis on 23 Sept 2005, 4:33 p.m. 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

Re: Recognizing HP 41 model (C, CV or CX) Message #2 Posted by Vieira, L.C. (Brazil) on 23 Sept 2005, 5:04 p.m., in response to message #1 by Francis 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.

Re: Recognizing HP 41 model (C, CV or CX) Message #3 Posted by Garth Wilson on 23 Sept 2005, 8:58 p.m., in response to message #2 by Vieira, L.C. (Brazil) 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).

Re: Recognizing HP 41 model (C, CV or CX) Message #4 Posted by Peter Geiser on 23 Sept 2005, 5:07 p.m., in response to message #1 by Francis 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

Oops! (was: Recognizing HP 41 model (C, CV or CX)) Message #5 Posted by Vieira, L.C. (Brazil) on 23 Sept 2005, 5:14 p.m., in response to message #4 by Peter Geiser 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)

Re: Recognizing HP 41 model (C, CV or CX) Message #6 Posted by Richard Garner on 23 Sept 2005, 5:09 p.m., in response to message #1 by Francis 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

Re: Recognizing HP 41 model (C, CV or CX) Message #7 Posted by Richard Garner on 23 Sept 2005, 5:15 p.m., in response to message #6 by Richard Garner Sorry about the misspellings. I hit the post button by mistake while trying to click on something else.

Re: Recognizing HP 41 model (C, CV or CX) Message #8 Posted by don wallace on 23 Sept 2005, 6:11 p.m., in response to message #1 by Francis 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

Re: Recognizing HP 41 model (C, CV or CX) Message #9 Posted by Randy on 23 Sept 2005, 7:59 p.m., in response to message #1 by Francis 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.

Re: Recognizing HP 41 model (C, CV or CX) Message #10 Posted by Francis on 24 Sept 2005, 6:04 a.m., in response to message #1 by Francis Many thanks to all of you guys... That's exactly what I looked for... Francis

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