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C.Ret · (This post was last modified: 11-27-2022 10:43 AM by C.Ret.)

(11-26-2022 04:45 PM)Albert Chan Wrote: I hope Emu71/DOS get update to use modern hardware, instead of running in DosBox, killing its performance.

I don't quite understand the point of further accelerating an emulator that is already over 110x the speed of real hardware.

Or, the goal is to demonstrate that the HP-71B is too old and too slow to be used for serious purposes now.

I strive to use only real material and I see that the slightest attempt takes several hours while others waste only a few minutes of their free time to obtain more results than I could ever obtain.

The HP-71B is like me, old and outdated.

EDIT 2022-11-27 09:43 (UTC+1 Paris):

Meanwhile, my second timing attempt is running, and I get the following times:

LIST
10 SETTIME 0 @ DESTROY ALL @ OPTION BASE 1 @ REAL N,I,P,Q,X @ N=10000 @ INTEGER D(N)
20 D(1)=1 @ P=3 @ FOR I=2 TO N @ Q=P @ P=FPRIM(P+2) @ D(I)=P-Q @ NEXT I
30 DEF FNF(X) @ Q=-P @ FOR I=N TO 1 STEP -1 @ Q=Q*X+D(I) @ NEXT I @ Q=Q*X+2 @ FNF=Q*(1+X)^3 @ END DEF
40 DISP P;TIME$ @ DISP FNROOT(-.997,-.996,FNF(FVAR));TIME$ @ DISP FNROOT(-.9999,-.999,FNF(FVAR));TIME$

DELAY 0,0
RUN
104743 00:36:54
-.996168277368 01:48:45
-.999296380168 03:12:26

These are hours, minutes and seconds. I hope this data will help you to adjust the calibrations of your emulators. And fortuitously that they will also help you to realize the energy and the patience which it is necessary to mobilize on the real material to try to follow your fentasques simulated fentasme.

EDIT 2022-11-27 10:26 (UTC+1 Paris):

(11-26-2022 08:06 PM)Albert Chan Wrote: With 0.0007 < y < 0.004, this make horner's rule close to 15-digits precision.
We still ends up to the same roots, it just take longer.

Well this is what happens...

I barely have time to persist on my unique HP-71B. While it has not finished the first calculation, Albert Chan has already on his virtual DOS and WINDOWS development platforms had time to do many tests, research and progress...

..grrr..

I'll try his new algorithm next weekend, if I find the time.
I also stuck a post-it on the fridge's door to remind me to buy a new set of AAA batteries this Tuesday.
Albert Chan said it just took longer.