NEW: HP 15C Collectors Edition

[Pekis]

(08-04-2023 03:41 PM)Gene Wrote:  Beware entering programs > 999 steps. Line numbers do not function properly when 4 digits are needed. You are on your own in that territory. :-)

Also memory is properly conserved from 15 to 15.2 mode. No problem.

From 15.2 to 15 mode, it is conserved as long as no ram was used in the area abound the 15 mode. Example, if you have a 15.2 program using 800 steps and switch to 15 mode, it will not properly conserve memory. Same with data registers.

Safest usage in 15.2 mode would then be 51 DIM (i) so that MEM becomes 51142 00-0, with 142*7=994 programming steps

[J-F Garnier]

(08-04-2023 03:41 PM)Gene Wrote:  Also memory is properly conserved from 15 to 15.2 mode. No problem.

From 15.2 to 15 mode, it is conserved as long as no ram was used in the area abound the 15 mode. Example, if you have a 15.2 program using 800 steps and switch to 15 mode, it will not properly conserve memory. Same with data registers.

It seems some are a few steps ahead of me on this topic :-) No mystery about that.
BTW, does 15.2 mean 15 with 2x the memory ? 15CII ?

But I can reproduce some funny effects on my emulator:
- in 15.2 mode create a 10x10 matrix to reduce the free registers to 74,
- switch back to 15 mode, and try MEM --> Error 10.
No crash ... Isn't it robust coding? I don't advise to stay in this situation, however.

Actually, once you are in the 15.2, 192-register mode, I see no objective reasons to go back to the nominal 96 register mode, except for tests.

J-F

[J-F Garnier]

(08-04-2023 03:56 PM)Pekis Wrote:  Safest usage in 15.2 mode would then be 51 DIM (i) so that MEM becomes 51142 00-0, with 142*7=994 programming steps

No, the main benefit of the extra memory is to be able to use more and/or larger matrices, for instance you have room for two 8x8 matrices.

J-F

[Gene]

The other benefit is to have programs up to 999 steps rather than merely (haha) ~660 or so.

And keep in mind this is a freebie fun thing to play with :-)

[Cococollector]

#1009, first prime number w/ 4 digits.
In Roman numerals its MIX, very speaking after the discovery of hidden features...

A 16C overlay would be a great addition!

[Voldemar]

(08-04-2023 03:20 PM)Pekis Wrote:  Mine had 94 99 00-0 as initial MEM in 15.2 mode.

Indeed
Changing mode from 15C to 15.2C do not change data storage memory pool. After reseting memory in 15.2C mode ([ON]/[-]) MEM is 94 99 00-0. Back to 15C and MEM is 94 03 00-0, after memory reset in 15C mode 19 78 00-0

[Voldemar]

(08-04-2023 04:04 PM)J-F Garnier Wrote:  Actually, once you are in the 15.2, 192-register mode, I see no objective reasons to go back to the nominal 96 register mode, except for tests.

We stay at 15.2C

[Valentin Albillo]

.
Hi, J-F,

(08-04-2023 04:07 PM)J-F Garnier Wrote:  the main benefit of the extra memory is to be able to use more and/or larger matrices, for instance you have room for two 8x8 matrices

Actually three, so you can at long last multiply two 8x8 matrices.

Regards.
V.

[Raymond Del Tondo]

(08-04-2023 04:12 PM)Gene Wrote:  The other benefit is to have programs up to 999 steps rather than merely (haha) ~660 or so.

And keep in mind this is a freebie fun thing to play with :-)

Are there any 15C programs (or combination thereof) consisting of more than 600 steps?

[Gene]

Probably not yet ! :-)

[etn]

Hi All,

First post here, although I have been reading this forum for many years. I have an HP-11C, 12C, 16C, 35S, 42S, 48GX, DM42, and a 15C CE on order (delayed delivery due to DPD, the worst carrier ever ) I work as a product line manager in the semiconductor industry.

Just want to also use the occasion to thank everyone involved in the development of the 15C CE! What a surprise when I discovered it here (at the beginning of this thread), I had to order one on the spot.

(08-04-2023 05:47 PM)Raymond Del Tondo Wrote:  Are there any 15C programs (or combination thereof) consisting of more than 600 steps?

Feel free to call me unimaginative here, but is there a point in having programs of that size without any I/O possibility other than the keyboard, 20 labels and no alphanumeric one (like in the 41/42S, where you could use them for separate programs) ?

[Voldemar]

Looked at the 16C mode. Nice.
Warning!
In 16C mode no [ON]/[...] combination works, when the calculator is off, pressing and holding [ON] will turn the calculator on immediately. If you try to press and hold [-], then [ON], the calculator hangs and you will have to press the reset button under the battery cover. So in 16C mode you can't get a comma as a decimal separator, reset memory.
The other [ON]/[...] combinations described in the original 16C manual - [ON]/[÷], [ON]/[×], [ON]/[+], will also cause the calculator to hang.

[Pekis]

(08-04-2023 05:47 PM)Raymond Del Tondo Wrote:  

(08-04-2023 04:12 PM)Gene Wrote:  The other benefit is to have programs up to 999 steps rather than merely (haha) ~660 or so.

And keep in mind this is a freebie fun thing to play with :-)

Are there any 15C programs (or combination thereof) consisting of more than 600 steps?

sorry, but it might be well suited to long computations like geographic coordinates conversions ...

[Michael de Estrada]

(07-27-2023 11:08 PM)rprosperi Wrote:  The keys for the 15c CE are definitely not exactly the same as the LE as that was made in China and the 15c CE made by a different company in Philippines. The newest 12Cs also come from Philippines and the 2 units I have from there have been perfect with no missed or repeated strikes.

Also, more often these days than in classic "HP times", there is dust/dirt and oils on the material surfaces which can and do interfere with precise key clicks. Most often pressing a troublesome key 20-50 times "cleans" the dirt/oil/etc. and the key settles down and behaves more consistently as expected. I have no idea at all if this is the case here (I don't have a CE yet) but it is advice well worth trying, as it may clear the problem and will do no harm if that's not the cause.

Unfortunately, my HP 15c CE has a period (.) key that does not register w/o an extra hard press. No amount of repeated pressing has fixed this problem. The remaining keys seem to work properly, and so far I've not experienced any repeating.

[Michael de Estrada]

(08-04-2023 04:12 PM)Gene Wrote:  The other benefit is to have programs up to 999 steps rather than merely (haha) ~660 or so.

And keep in mind this is a freebie fun thing to play with :-)

Also, there is no point in having more than 99 allocated registers, since AFAIK register numbers consist of only two digits. Please correct me if I'm wrong about this.

[Gene]

Data registers - correct. An Error 10 results if you try 100 DIM (i).

However, the 15C CE can hold several large matrices using that data space just not “data memories”

[rprosperi]

(08-04-2023 05:47 PM)Raymond Del Tondo Wrote:  

(08-04-2023 04:12 PM)Gene Wrote:  The other benefit is to have programs up to 999 steps rather than merely (haha) ~660 or so.

And keep in mind this is a freebie fun thing to play with :-)

Are there any 15C programs (or combination thereof) consisting of more than 600 steps?

The only thing that has come to mind is to write something like a manual matrix inversion the long way, and without using loops, just linear code. Or, to say it another way... no.

Or at least, not yet... someone will come up with something spectacular no doubt, as can you recall any machine that had larger memory than needed by anyone, forever?

But OTOH, even if someone does a Herculean job and makes one, how many other people are willing to key in that many lines, and without mnemonic op codes?

The DM15 has had this for several years, and it even has a serial port and connection to Torsten Manz's superb HP-15C Simulator on the PC, and still I haven't seen any programs near this size.

Still, it's nice having the extra space... it feels... good.

[Divasson]

(08-05-2023 02:07 AM)rprosperi Wrote:  

(08-04-2023 05:47 PM)Raymond Del Tondo Wrote:  Are there any 15C programs (or combination thereof) consisting of more than 600 steps?

The only thing that has come to mind is to write something like a manual matrix inversion the long way, and without using loops, just linear code. Or, to say it another way... no.

Or at least, not yet... someone will come up with something spectacular no doubt, as can you recall any machine that had larger memory than needed by anyone, forever?

But OTOH, even if someone does a Herculean job and makes one, how many other people are willing to key in that many lines, and without mnemonic op codes?

The DM15 has had this for several years, and it even has a serial port and connection to Torsten Manz's superb HP-15C Simulator on the PC, and still I haven't seen any programs near this size.

Still, it's nice having the extra space... it feels... good.

I have put many programs together, and the limit definitely is the number of labels, not the program lines. (not to mention the rewriting of programs to use different labels from the ones already used). Now, if you want to use big matrices and programs, then you may need all the space. Any stupid circuit analysis using complex matrices becomes big in a second - and that can be a real concern (that is, in the strange world where you don't have a computer at your fingertip all the time)

[ctrclckws]

A few simple questions:

Is the CPU in the 15C Collectors Edition the same as the CPU in current 12C models?

Is it the same as the earlier Limited Edition models?

Has anyone checked the known bugs list from the Limited Edition? Are they resolved, hopefully, without introducing new ones?

[Thomas Radtke]

PSE works. Not so important to me, but still the second thing I have tried. Right now testing brownout detection. By using, of course .