Search found 499 matches

by Walter
Thu Nov 08, 2018 7:23 am
Forum: DM42
Topic: Solve Systems of Equation with Complex Coefficients
Replies: 5
Views: 204

Re: Solve Systems of Equation with Complex Coefficients

Is there a way to solve a system of equations on the DM42 with complex coefficients? i.e. A*X=B; where A contains complex numbers of the form a+jb. Any help would be appreciated. There's a very nice manual available for the HP-42S which is the mother of Free42 which is the mathematical part of the ...
by Walter
Mon Nov 05, 2018 3:15 pm
Forum: Hardware issues
Topic: Keyboard debouncing
Replies: 50
Views: 3842

Re: Keyboard debouncing

Dave Britten wrote:
Mon Nov 05, 2018 2:23 pm
My big fear is that I'm going to hit Shift-Clear, CLP or CLV, and get a bounce on that function key, nuking something I didn't want to delete. Hasn't happened so far...
Golden rule of layouting: avoid such possibilities!
by Walter
Mon Oct 29, 2018 4:49 am
Forum: Usage tips, tricks and problem reports
Topic: DM42- clock losing time
Replies: 7
Views: 571

Re: DM42- clock losing time

Since time functions are included in the DM42, a crystal would be very useful to make them accurate. Maybe there's a way to add one ourselves as there was in the HP-45. That calculator had undocumented timer and stopwatch functions but no crystal so the accuracy was terrible. Someone came up with a...
by Walter
Sun Oct 28, 2018 5:15 pm
Forum: Usage tips, tricks and problem reports
Topic: Updating from 3.3 to 3.10
Replies: 45
Views: 1547

Re: Updating from 3.3 to 3.10

Congratulations!

So at the bottom line the problem was on the PC side, not on the DM side.
by Walter
Sat Oct 27, 2018 7:56 pm
Forum: Discuss!
Topic: DM 48 .... WHY NOT ?!!!
Replies: 47
Views: 3693

Re: DM 48 .... WHY NOT ?!!!

At this stage of my life, smaller isn't necessarily better if I can't read the labels. We all have different needs -- finding the "sweet spot" of form and function for a diverse audience isn't easy, but it's impossible if that audience doesn't share its impressions. As we do. 8-) And BTW, opticians...
by Walter
Sat Oct 27, 2018 4:01 pm
Forum: Discuss!
Topic: DM 48 .... WHY NOT ?!!!
Replies: 47
Views: 3693

Re: DM 48 .... WHY NOT ?!!!

For what it's worth, you're interpretation of my opinion is slightly off -- without knowing a cost, how could I possibly have an opinion of its value? It is my opinion that the current key configuration of the DM42 would require significant compromises to a DM48 implementation, and as such would li...
by Walter
Sat Oct 27, 2018 2:28 pm
Forum: Discuss!
Topic: RE: HP-Meeting on November 3rd in Allschwil, Switzerland
Replies: 4
Views: 611

Re: RE: HP-Meeting on November 3rd in Allschwil, Switzerland

... just only one week to go!

Looking forward to meeting some folks - some again and some for the first time.
by Walter
Sat Oct 27, 2018 3:48 am
Forum: Usage tips, tricks and problem reports
Topic: DM42- clock losing time
Replies: 7
Views: 571

Re: DM42- clock losing time

IIRC, there were several complaints about the precision of this "Swiss" clock many months ago. They were answered that this is no quartz-controlled clock. So you experience what your grandparents did. That won't help but may make you feel better.
by Walter
Fri Oct 26, 2018 6:25 am
Forum: Discuss!
Topic: DM 48 .... WHY NOT ?!!!
Replies: 47
Views: 3693

Re: DM 48 .... WHY NOT ?!!!

DavidM wrote:
Wed Oct 24, 2018 3:24 pm
Walter wrote:
Wed Oct 24, 2018 10:49 am
Sounds like progress ... ;)
Well, not so much to me. ...
You didn't read the emoticon, did you? :? I share your opinion that a DM48 isn't worth the cost.
by Walter
Thu Oct 25, 2018 1:54 pm
Forum: DM42
Topic: Somehow offtopic...somehow not that much...
Replies: 6
Views: 484

Re: Somehow offtopic...somehow not that much...

toml_12953 wrote:
Thu Oct 25, 2018 9:04 am
Joe Horn wrote:
Thu Oct 25, 2018 2:28 am
Image
LOL! Methinks you have committed a SIN()
:shock: Thou shall not kill! :x