What do you keep on your 42S?
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10-23-2019, 03:42 PM
Post: #1
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What do you keep on your 42S?
I've had a DM42 for about 2 years now, and I finally got a "real" 42S last month. It's making me appreciate squeezing every last byte out of that little 8 KB RAM chip, and also realize how much I take the huge memory of the DM42 for granted!
Those of you with a 42S, what do you keep on there as your (semi-)permanent loadout? I've managed to cram all this into mine so far: - GCD, LCM, Floor, Ceiling, Reduce fraction - Fractional approximation (http://www.finetune.co.jp/~lyuka/technot...t-42s.html) - much smaller than QPI, and I don't need the pi or radical approximations it offers - Factor - the venerable mod 30 sieve I implement on everything - IO Record - for tracking fluid input/output during the week (my doctors make me do this), uses about 11 matrices for data storage - A couple solver programs for doing IV rate calculations - Natural logarithm of gamma - adapted from here: http://www.rskey.org/fx850p (reasonably accurate for any arguments that would overflow the built-in GAMMA) - Binomial probability distribution (uses the log gamma function to handle extremely large inputs) - Negative binomial probability distribution - Hypergeometric probability distribution - TVM solver program - Unit conversions: length, area, volume, mass, temperature, speed, pressure (each handles 4-8 different units that I use often enough to want on here); these are based on the program design in 42S Mechanical Engineering - Resistor color decoding/encoding - tweaked version of https://www.hpmuseum.org/forum/thread-6865.html, and an ohms-to-color program that I can't remember if I found somewhere or wrote myself - IP address calculator - does subnet conversion, finds broadcast addresses, calculates number of hosts in a subnet, etc. (probably coming soon to the software library forum) - Date calculations (can't remember where I found these programs) - Speed-of-sound solver program - based on formulas here: http://www.sengpielaudio.com/calculator-speedsound.htm And somehow I still have 1,457 bytes free! Right now I'm running SIZE 0030 with real REGS. I might try to fit the triangle solver from the 32S Engineering Applications book. If I can keep around 1 KB free, that should be enough for any transient data/programs I need to work with temporarily. What do other 42S users like to spend their RAM on? With as much as I paid for it, I'm not quite brave enough to crack it open and put in a 32 KB RAM chip, but if (heaven forbid) I ever have to open it up for repairs, I might try upgrading the RAM while I'm in there. |
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Messages In This Thread |
What do you keep on your 42S? - Dave Britten - 10-23-2019 03:42 PM
RE: What do you keep on your 42S? - Eddie W. Shore - 10-24-2019, 03:39 PM
RE: What do you keep on your 42S? - Dave Britten - 10-30-2019, 03:56 PM
RE: What do you keep on your 42S? - Jeff O. - 10-30-2019, 04:44 PM
RE: What do you keep on your 42S? - Dave Britten - 10-30-2019, 06:34 PM
RE: What do you keep on your 42S? - pinkman - 10-31-2019, 12:34 AM
RE: What do you keep on your 42S? - ijabbott - 10-30-2019, 11:09 PM
RE: What do you keep on your 42S? - Trond - 11-01-2019, 02:51 AM
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