wp34s - Maybe dumb question - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: wp34s - Maybe dumb question (/thread-203629.html) |
wp34s - Maybe dumb question - John Abbott (S. Africa) - 11-02-2011 I am writing a program for the 34s, and registers I, J and K store Matrix descriptors. Re: wp34s - Maybe dumb question - Paul Dale - 11-02-2011 Don't don't don't don't don't call SAVE from a program that is frequently executed. You will destroy the flash in the device :-( Flash has a limited number of write cycles and one is used each time SAVE is executed. That said, RCF can be used to recall the individual registers you want. Better would be to not use I & J in your code. Even beter would be to take the V.V routine and remove the stores to I and J:
001 ***LBL'V.V' - Pauli
Edited: 2 Nov 2011, 6:19 a.m.
Re: wp34s - Maybe dumb question - John Abbott (S. Africa) - 11-02-2011 Arrrgh... Thanks Pauli, sometimes one can't see the wood for the trees. Re: wp34s - Maybe dumb question - Paul Dale - 11-02-2011 RCF and the arithmetic versions allow you to directly access the saved registers in the backup flash region. No other use.
Re: wp34s - Maybe dumb question - Marcus von Cube, Germany - 11-02-2011 If we run out of space we may even get rid of those. I'm working on a scheme that allows to have more data in RAM and it should then be easy to just copy the backup registers over to temporary storage for easy access.
Re: wp34s - Maybe dumb question - John Abbott (S. Africa) - 11-02-2011 Thanks Marcus, that would be really useful. |