Christie Malry Ⓐ ☭Jul 20, 2023
Sarah Libman
Hey lovely Mastodon folk. I've just released an HP-35, HP-45, HP-80 simulator called HP-1973 to celebrate the 50th anniversary of the HP-45 calculator. (Free) standalone versions for Mac and WIndows (no need for any Python installation or knowledge) & Python source for Linux. It's been a coding marathon, so it'd mean a lot to me if you could boost this post, so it gets in front of the right people. Download here: https://sarahkmarr.com/retrohp1973.html Enjoy. #retrocomputing #calculators #python #coding #rpn
Jul 20, 2023 at 6:12pmWeb
Show threadSarah LibmanJul 20, 2023
Here are the various parts of the HP-1973 window. The ROM map, keyboard and list pane can all be independently hidden or shown. Download: https://sarahkmarr.com/retrohp1973.html #retrocomputing #calculators #python #coding #rpn
Show threadSarah LibmanJul 20, 2023
HP-1973 comes with an awful, awful lot of help. Like a _lot_. Really. Loads. Download: https://sarahkmarr.com/retrohp1973.html #retrocomputing #calculators #python #coding #rpn
Show threadSarah LibmanJul 20, 2023
Plus, if you don't like the default colours, HP-1973 has seven included themes. Mastodon types might like "Litmus"... Download: https://sarahkmarr.com/retrohp1973.html #retrocomputing #calculators #python #coding #rpn
Show threadDuncan MurraySep 9, 2023
@SarahKL This is fascinating. I was reading up about the Cordic algorithm recently - is it possible to see the Cordic algorithm in action with this?
Show threadSarah LibmanSep 9, 2023
@dm319 It's running the original ROM code, and that uses Cordic, so by using stepping mode and following the code/memory contents, yes, that should be possible, if a little tricky.
Show threadDuncan MurraySep 9, 2023
@SarahKL Wow, very cool. I suspect I need more understanding to figure it out, but maybe one day I will and demonstrate it with your emulator! I just put in a bid for a HP-67 - the people who made these machines are geniuses.
Show threadSarah LibmanSep 9, 2023
@dm319 They are! You can see their brilliance and their clear love for what they were doing in the hardware and software. There's a page on the web specifically about the HPs and Cordic: googling should turn it up. Good luck with the '67 bid!
Show threadDuncan MurraySep 9, 2023
@SarahKL I also find it fascinating that these processors were using decimal down to the CPU level. Sadly didn't get the HP-67 (it was for parts but still went for a lot).
Show threadSarah LibmanSep 9, 2023
@dm319 Yeah, 4-bit binary coded decimal in the registers. It's get harder and harder to get old HPs for anything affordable. (Although the Facebook group seems full of US folk finding them for 99¢ in estate sales.)
Show threadDuncan MurraySep 9, 2023
@SarahKL Ha ha, that hurts!! I really don't know at what point in my life I suddenly developed a very strong affection for those trapezoid keys. They are quite rare in the UK - have never seen an HP in the wild in use around here. Maybe HP never marketed to the UK as we were too poor!
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL Hi, my Apple silicon Mac comes up with this error, have I done something wrong?
Show threadSarah LibmanJul 20, 2023
@andyh2o Oh, that's interesting. Hmmm. What happens if you rename hp1973_prefs_normal.json to hp1973_prefs.json?
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL I tried that and it gave exactly the same error message.
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL *I copied the file and renamed it, I also renamed the 'normal' and 'short' files (prefixed with xx and the same again.)
Show threadSarah LibmanJul 20, 2023
@andyh2o I'm having the same problem (for the first time). I'll try to get to the bottom of it. Thanks for letting me know.
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL You're welcome, I just duplicated it on my 2018 Intel MB Air too. Hope you sort it soon. Cheers
Show threadSarah LibmanJul 20, 2023
@andyh2o Very odd. I've removed the Mac download whilst I sort it. I'll message you when it's fixed!
Show threadJiří Fiala Total LandscapingJul 20, 2023
@SarahKL @andyh2o Same
Show threadSarah LibmanJul 20, 2023
@stooovie @andyh2o Working on it. Was bound to happen after launching it, and not the multiple times I tried before launching, right?
Show threadJiří Fiala Total LandscapingJul 20, 2023
@SarahKL @andyh2o especially with the apple silicon transition, yeah :) it's all good
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL @stooovie It's always the way 🙂
Show threadSarah LibmanJul 20, 2023
@andyh2o @stooovie OK. I think it's fixed. Could you download and try? (If you're still getting a version with the json files visible, then you're downloading from a cache somewhere: should just be the app and a txt file.)
Show threadJiří Fiala Total LandscapingJul 20, 2023
@SarahKL @andyh2o working! For posterity: I'm on M1 MBP, Ventura 13.4.1
Show threadSarah LibmanJul 20, 2023
@stooovie @andyh2o Hooray! That was a tense few minutes!
Show threadAndy Horne 🇪🇺🎸Jul 20, 2023
@SarahKL @stooovie Brilliant, working, thanks!
Show threadSarah LibmanJul 20, 2023
@andyh2o @stooovie Thank you both for taking the time to message me so quickly about the problem.
Show threadThe SecretbatcaveJul 20, 2023
@SarahKL @rc2014 oh my!
Show threadEthan BlantonJul 20, 2023
@SarahKL That program is gorgeous and so are your preview shots. Thank you!
Show threadSarah LibmanJul 20, 2023
@elb Thanks so much for taking the time to let me know: it's been a solitary (if mostly enjoyable) task coding, so knowing that people are enjoying the result is fantastic.
Show threadEthan BlantonJul 20, 2023
@SarahKL I can confirm that your target audience is me. ;-)
Show threadjasegJul 20, 2023
@SarahKL Just visually that already looks amazing!
Show threadSarah LibmanJul 20, 2023
@jaseg Thanks: I was going for retro-chic. (Also, I couldn't be bothered to teach myself a more modern windowing environment, for now. Shh: don't tell anyone.)
Show threadrhempelJul 20, 2023
@SarahKL I'm glad HP calculators are getting some love - bought my first HP-21 when I was a kid. I love Free-42 for my phones and will check out your sim as well - doing what you love and sharing it makes everyone feel good!
Show threadGMate8Jul 20, 2023
@SarahKL this looks complicated and hell I LOVE it!
Show threadNeilh90Jul 20, 2023
@SarahKL that looks stunning
Show threadSarah LibmanJul 20, 2023
@Neilh90 Thank you!
Show thread🇳🇿   💉*9 RogerJul 20, 2023
@SarahKL oh wow! I bought an hp 35 back in the 70s. I just loved that machine and it helped me understand reverse polish. I went on to use the concept in several IT projects/products. I'll def give this a try.
Show threadSarah LibmanJul 20, 2023
@rogerparkinson Awesome. The emulator includes the original HP-35 ROM code (which has bugs) and the later, fixed ROM, too.
Show thread🇨🇦Jul 21, 2023
@SarahKL
More power to the calculators!
Show threadEugene WallingfordJul 21, 2023
@SarahKL Very cool. Thanks for sharing.
Show threadMagic Blue SmokeJul 21, 2023
@SarahKL absolutely in awe of this
Show threadjminorJul 21, 2023
@SarahKL so cool! Thanks for making this!
Show threadLee AnnJul 21, 2023
@SarahKL Cool! I've got an HP-01 emulator iOS and WatchOS app (Calc-01), free on the app store, Swift code here: https://github.com/lrucker1/Calc01
GitHub - lrucker1/Calc01: iOS/WatchOS calculator based on HP-01 calculator watch

iOS/WatchOS calculator based on HP-01 calculator watch - GitHub - lrucker1/Calc01: iOS/WatchOS calculator based on HP-01 calculator watch

GitHub
Show threadSarah LibmanJul 23, 2023
@jamoche That looks like it must be so cool on the Apple watch.
Show threadStuart MarksJul 21, 2023
@SarahKL Wow, looks amazing! I guess it simulates things at the ROM level and doesn’t reimplement things in a modern language. Does simulation at this level include the (not very accurate) timer function accessible on the HP-45 by holding down CHS-7-8 keys simultaneously?
Show threadSarah LibmanJul 21, 2023
@stuartmarks It absolutely simulates things at the ROM level: everything the calculator does is done using its ROM code, including any bugs in the original. And yes, the timer function's all there. It just uses '?' to generate the necessary keycode, rather than a combination of keys: then the ROM code does its thing.
Show threadStuart MarksJul 21, 2023
@SarahKL Nicely done. I’ll have to give it a try.
Show threadpandoraJul 21, 2023
@SarahKL unfortunately it is too big to fit my MacBook Air screen
Show threadSarah LibmanJul 21, 2023
@pandora Ah. If it's just too wide, have you tried shift+k to turn off the onscreen keyboard? You don't need it: all the calculator keys are mapped onto the computer keyboard.
Show threadpandoraJul 21, 2023
@SarahKL oh yes that kinda works. Thx
Show threadAlexander JanßenJul 21, 2023
@SarahKL
Woa woa woa why do I have an appointment now I must try this...
Show threadваятJul 21, 2023
@SarahKL @hpiedcoq 👀🤓