Hewlett Packard HP15C
Re: Hewlett Packard HP15C
Many thanks BigEd,
I'm working my way through the manual and whilst it's not an essential diagram I was interested to see it because it wasn't in the manuals I've downloaded.
I'm working my way through the manual and whilst it's not an essential diagram I was interested to see it because it wasn't in the manuals I've downloaded.
Re: Hewlett Packard HP15C
Take note, the recently franchised outfits which have taken over HP's calculator business have announced the imminent availability of a new, faster, HP15C which they have called "collector's edition" to distinguish it.
It's £100, on pre-order in the UK. (This site suggests it's a limited edition, but that's not clearly the case.)
https://www.studentcalculators.co.uk/ac ... ckard.html
See also
https://www.hpmuseum.org/forum/thread-19886.html
This new model credits a number of prominent people in the HP calculator enthusiast community and claims a number of bug fixes: it should be pretty good. (Edit: it's the fastest 15C and has more registers and program space too.)
It's £100, on pre-order in the UK. (This site suggests it's a limited edition, but that's not clearly the case.)
https://www.studentcalculators.co.uk/ac ... ckard.html
See also
https://www.hpmuseum.org/forum/thread-19886.html
This new model credits a number of prominent people in the HP calculator enthusiast community and claims a number of bug fixes: it should be pretty good. (Edit: it's the fastest 15C and has more registers and program space too.)
Re: Hewlett Packard HP15C
I understand that Atmel based HP Voyager series calculators can be flashed with HP15C firmware but require a keyboard overlay and stickers for the keys.
Re: Hewlett Packard HP15C
There are some models which can be reflashed, and there are some approaches which need stickers - I'm OK with an overlay but I don't think stickers would do it for me. (I did buy a 30b because it can be reflashed as a full-featured scientific, instead of a semi-scientific business calculator, but I never did flash it.)
Being HP's own, that emulator is 100% the same as the calculator. Others do vary... but one interesting thing is a tweaked firmware "HP15C_XE" for HP's emulator which increases the memory (forum login needed for the download.) This particular tweak may have problems with large matrix operations - see the readme within the download. Having said which, it passes this test of solving an 8x8 system of equations, which the actual 15C can't fit.
Are you sure? HP did release a free-of-charge emulator, with the usual restrictive click-through license, but I'm not aware of any source for it. You can download the Windows installer for each of several HP models here and more here. For me the HP15C emulator runs OK in WINE on Mac. I believe it's the same version as the Limited Edition.
Being HP's own, that emulator is 100% the same as the calculator. Others do vary... but one interesting thing is a tweaked firmware "HP15C_XE" for HP's emulator which increases the memory (forum login needed for the download.) This particular tweak may have problems with large matrix operations - see the readme within the download. Having said which, it passes this test of solving an 8x8 system of equations, which the actual 15C can't fit.
Nice! I was prompted by this to check out a few 15C emulators. I have two diagnostics:
- 3* (4/3 - 1) - 1 which won't be zero
- sin(3.141592653) in radians mode, which won't be zero (this is 10 typed digits of pi, not the pi button)
- -1E-9 and 5.9E-10
- ditto
- -2.220446049E-16 and 5.897932257E-10 (binary floats both!)
- -1E-9 (decimal!) and 5.897932257E-10 (binary!)
- -2.220446049E-16 and 5.897932257E-10 (binary floats both!)
Re: Hewlett Packard HP15C
I don't know where that came from, I may have misread a forum post that was wishful thinking/chagrin.
Sorry about that BigEd
Re: Hewlett Packard HP15C
I found this about 12C flashing, it seems to be JTAG dependant for copying the existing rom.BigEd wrote: ↑Mon May 15, 2023 4:20 pm There are some models which can be reflashed, and there are some approaches which need stickers - I'm OK with an overlay but I don't think stickers would do it for me. (I did buy a 30b because it can be reflashed as a full-featured scientific, instead of a semi-scientific business calculator, but I never did flash it.)
There's copyright issues involved with flashing also with 12C/16C you'd need a good memory without stickers for the keys and an overlay.
Re: Hewlett Packard HP15C
My old Windowsphone has a calculator with various functions, including a programmers calculator:
Useful if you haven't got a 16C!
Useful if you haven't got a 16C!
Re: Hewlett Packard HP15C
Left and right shifts too - very nice, and quite unusual. The HP-35s offers hex numbers but does it in quite a clumsy way. So clumsy I've never really experimented.
Re: Hewlett Packard HP15C
It does rotate right and rotate left as well.
I've not got so far with my projects that I've used it!
Re: Hewlett Packard HP15C
Subsequent to Big Ed's post with the diagram in question, I found that the picture of the registers, although not present on the inside cover where it was claimed to be, is actually on p.76 of the owner's handbook.sP1d3r wrote: ↑Mon Feb 20, 2023 12:14 pm I wonder if anyone has an original copy of the HP15C owner's manual?
There's an illustration at the back of the manual, the inside cover I believe, that doesn't appear in any of the downloadable manuals that I've found online.
It's a diagram showing registers r0 to r9, r.0 to r.9 and the index register.
If anyone has a copy of the manual and the inclination to post a photo of the diagram, I'd appreciate it.
This may not be the particular diagram referred to but it's essentially similar, BTW.