Hi all, I forgot to mention that the PIC code interacts with the Windows PC emulator. It uploads the microcode data to the PIC via the USB port to make it function as any of the listed calculators, plus it can upgrade the compiled emulator code if it needs tweeking. cheers Tony On Sat, Sep 17, 2016 at 8:28 AM, Anthony Nixon wrote: > Russell wrote: > > For interest - I didn't see it mentioned - it may have been - the T > register on an HP35 used to be corrupted by certain operations. Sin at > least and I think some other transcendental functions. Ran out of room I > guess. Does your emulator provide that "feature" ? :-). > > I didn't know that, but the first models did have the LN conversion > bug. My original microcode does not have that problem, so must be a > later version. > >> When will the 3D printed cases be available ? :-) :-) :-) :-) > > I thought of that but - man what a task, and I could never come up > with a keyboard that worked and felt as good as the originals. 40+ > years of use and still going. > > cheers > > Tony > > On Sat, Sep 17, 2016 at 7:53 AM, RussellMc wrote: >> >> On 16 September 2016 at 21:33, Anthony Nixon wrote= : >> >>> Hi all, >>> >>> Not sure if anyone is interested but I published the source code for >>> the calculator emulator for the PIC16F1519 chip. >>> >>> It has the code to emulate the following HP calculators from the 70's e= ra. >>> >>> HP21, HP22, HP25, HP27, HP29C, HP31E, HP32E, HP33E, HP37E, HP35, HP45, >>> HP55, HP65, HP67, HP70, HP80 >>> >>> www.teenix.org >> >> Thanks Tony - I'll (again) pass this on to a friend who at one stage set >> out to interface to an HP35. It was stolen part way through the process. >> >> For interest - I didn't see it mentioned - it may have been - the T >> register on an HP35 used to be corrupted by certain operations. Sin at >> least and I think some other transcendental functions. Ran out of room I >> guess. Does your emulator provide that "feature" ? :-). >> >> When will the 3D printed cases be available ? :-) :-) :-) :-) >> >> >> >> Russell >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .