HP Forum Archive 19

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Brain dead, need help with program Message #1 Posted by briggleman on 15 Nov 2010, 5:40 p.m. OK, how do I enter 1E2 in a program for the HP42s. Now, why do I say brain dead, because at step 25 in a program I did this entry and no problem, now at step 155 I cannot remember how I did it. Too much drinking, brain cells destroyed. Please help

Re: Brain dead, need help with program Message #2 Posted by Steve Perkins on 15 Nov 2010, 7:27 p.m., in response to message #1 by briggleman I'm not sure where your difficulty lies, but here goes: Use the 'E' key next to the +/- key to enter an exponent (power of 10), which would be the same as the 'EEX' key on an HP-41C for example. To enter 1E2 you don't even need to enter the 1 if you don't want, just hit 'E' '2'. Hope that helped.

Re: Brain dead, need help with program Message #3 Posted by briggleman on 15 Nov 2010, 8:11 p.m., in response to message #2 by Steve Perkins Remind me, DO NOT DRINK AND PROGRAM, not a good thing. Besides all that, thank you very much. After 20 years I let the batteries die on my beloved HP42s. Yes, I did have printouts of all the programs I wrote for it back when they were HP41 codes. I then translated and modified the programs for the HP42s to take advantage of its menu system and in Sept. of 2002 got the bright Idea that I should print them out if I ever lost them. Thank God for hindsight. and it is really strange after realizing you wrote this stuff 30 plus years ago and now look at it and its all a wonder to you. I feel old.

Re: Brain dead, need help with program Message #4 Posted by Mike (Stgt) on 16 Nov 2010, 4:38 a.m., in response to message #3 by briggleman The saying goes: do not drink an DERIVE. Ciao.....Mike

Re: Brain dead, need help with program Message #5 Posted by Martin Pinckney on 15 Nov 2010, 10:31 p.m., in response to message #2 by Steve Perkins Quote: I'm not sure where your difficulty lies... Answer: Quote: Too much drinking, brain cells destroyed.

Re: Brain dead, need help with program Message #6 Posted by Allen on 15 Nov 2010, 10:23 p.m., in response to message #1 by briggleman why not just type 100?

Re: Brain dead, need help with program Message #7 Posted by briggleman on 16 Nov 2010, 6:41 a.m., in response to message #6 by Allen Quote: why not just type 100? Sorry, that was too easy. You have to remember I am old school when it comes to programing a calculator..... every byte or bit of memory is valuable. So 1E2 uses less memory than 100. No, it was the point of the matter that I figure out how to get 1E2 back into the program. I was determined. Now feeling very stupid as to not seeing the E key right in front of me!!! I mean.... I search the func. menu 10 times looking for that function and did not see it. Its like, have I forgotten that much since my twenties...... evidently so. It's like cell phones... I no longer remember phone numbers, they are all programed in. I became so reliant on my old programs, I forgot how I wrote them, the formulas involved... Wow. Now I really like "DO NOT DRINK AND DERIVE" thats a hoot. Thanks guys and gals. Much appreciated putting up with me on this. Edited: 16 Nov 2010, 7:50 a.m.

Re: Brain dead, need help with program Message #8 Posted by Michael Meyer on 16 Nov 2010, 1:13 p.m., in response to message #7 by briggleman I remember picking up my HP-71b more than 10 years after putting it in a box. I couldn't believe I ever knew how to use it. But after just a couple of days, I was getting up to speed. It'll come back to you if you study a bit. Now, my HP-25.... that's permanently in my brain. Maybe that's why it'll always be my favorite, emotionally, anyway.

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