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HP Forum Archive 08

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Does the memory of my HP-41CV break?
Message #1 Posted by Hiroshi Ito on 14 June 2002, 10:59 p.m.

Teach, please. Does the memory of my HP-41CV break? I have HP-41CV and HP-41CX. #1 I push a "[<-] + [on]" key at the same time. #2 A calculator indicates "MEMORY LOST". #3 I push a [PROG] key. #4 "HP-41CX" is indicated with "00 REG 219". #5 "HP-41CV" is indicated with "00 REG 46". I don't know why the indication of "HP-41CX" and "HP-41CV" is different. Does the memory of "HP-41CV" break? Or, is the default value of "HP-41CX" and "HP-41CV" only just different, and may I be relieved?

      
Re: Does the memory of my HP-41CV break?
Message #2 Posted by db(martinez,california) on 15 June 2002, 12:46 a.m.,
in response to message #1 by Hiroshi Ito

kom bam wa.

46 is what the cv is supposed to say upon waking up from a memory lost. it's because of the default "size". the cx has a default size of 100. so i guess the default size of the cv is about 272? your cx has a "size?" function but the cv doesn't.

o ya so me (sorry about the spelling)

            
Re: Does the memory of my HP-41CV break?
Message #3 Posted by thibaut.be on 15 June 2002, 4:16 a.m.,
in response to message #2 by db(martinez,california)

Actually the "size" function exists on the C, CV and CX series. This function allows a manual repartition between program lines and registers, and this is needed even on the C.

The default size of the CX is different than on the CV (don't remember by heart, I'll have a look at the manual), but the total memory size is exactly the same. Additional memory can be added to the CX with the X-Memory module, but this is another story. The result shown by Hiroshi are theefore absolutely normal.

            
Re: Does the memory of my HP-41CV break?
Message #4 Posted by Hiroshi Ito on 15 June 2002, 10:37 a.m.,
in response to message #2 by db(martinez,california)

understood it. It was a cause that default value with CV and CX was different. Thank you. # HP-41CV OWNERS MANUAL p34 default:R0-R273 + 46 common pool # HP-41CX OWNERS MANUAL p36 default:R0-R99 + 219 common pool

      
Re: Does the memory of my HP-41CV break?
Message #5 Posted by Ellis Easley on 15 June 2002, 7:28 a.m.,
in response to message #1 by Hiroshi Ito

Both CV and CX have function "SIZE" to set memory partition but only CX has function "SIZE?" to get current memory partition. Execute "SIZE" on CV, then enter 100, and it will have the same partition as the CX default partition.

            
Re: Does the memory of my HP-41CV break?
Message #6 Posted by CJ on 15 June 2002, 2:39 p.m.,
in response to message #5 by Ellis Easley

only CX has function "SIZE?" to get current memory partition.

"You are correct sir". That command is part of the X-Functions. So.... if you have a 82180A module, your C or CV will have that function, also the PPC Rom has a routine for that function.

Christopher


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