Search found 106 matches

by jonmoore
Tue Jun 09, 2020 1:54 pm
Forum: Hardware issues
Topic: LCD burn-in?
Replies: 10
Views: 6496

Re: LCD burn-in?

Walter wrote:
Tue Jun 09, 2020 11:12 am
Not observed yet although my off-images stay there for many hours.
IonX wrote:
Tue Jun 09, 2020 4:20 am
... I've got this OCD issues.
What did/do you mean here?
https://www.wikiwand.com/en/Obsessive%E ... e_disorder

Therefore, no amount of reassurance is enough.
by jonmoore
Fri Jun 05, 2020 11:18 am
Forum: DM41X
Topic: After extensive use: The keyboard
Replies: 28
Views: 1939

Re: After extensive use: The keyboard

Doing calculator HP restorations one sees the following: All classics, Woodstock’s, Spices, Voyagers, Coconuts, Pioneers, stretch Pioneers and Titans all have a transparent plastic film under the keys but over the PCA and domes. Sort of a dust and spill protection. I always renew these with a ziplo...
by jonmoore
Thu Jun 04, 2020 9:18 pm
Forum: DM41X
Topic: After extensive use: The keyboard
Replies: 28
Views: 1939

Re: After extensive use: The keyboard

yup, this is my only annoyance with what are otherwise wonderful devices. I've even fitted replacement keyboard "foils" to both my DM42 and DM41X, with a clean of the contacts (and the foil); the DM42 improved enormously, the DM41X not at all, which suggests there's more to it than just t...
by jonmoore
Thu Jun 04, 2020 4:26 pm
Forum: DM42
Topic: My DM42 Is lost
Replies: 38
Views: 7018

Re: Update to the original post

Dan Simpson wrote:
Thu Jun 04, 2020 3:03 pm
I just received an e-mail from Michael indicating that he has received my DM42. YAY!
Almost three months.
Were you ever able to find out where the longest delays occured?
by jonmoore
Thu Jun 04, 2020 4:23 pm
Forum: DM42
Topic: DM42 file read/write
Replies: 7
Views: 1185

Re: DM42 file read/write

13 digits of internal precision can solve a world of problems. Personally, I regret that the evolution of these new calculators, has not been accompanied by an increase in input capabilities (IO port) and storage (files access) ! That was the rationale of my demand ! Regards Michel Very fair point.
by jonmoore
Thu Jun 04, 2020 11:23 am
Forum: DM42
Topic: DM42 file read/write
Replies: 7
Views: 1185

Re: DM42 file read/write

Of course, the DM41X is a highly awaited calculator but I believe that the DM42 (wich is already a superb engine) IS NOT the HP42s. I think the DM42 could go further than just emulating the HP42s: high precision and local variables are a first attempt, but why stop here? In another hand, I fear tha...
by jonmoore
Wed Jun 03, 2020 1:35 pm
Forum: DM42
Topic: DM42 file read/write
Replies: 7
Views: 1185

Re: DM42 file read/write

For added clarity, whilst the HP-42s was the spiritual follow up to the HP-41 series and included the ability to work with programs written for the 41, it's different in many ways and file IO was one of those critical differences. This thread is a useful starting point with regard to understanding s...
by jonmoore
Wed Jun 03, 2020 12:38 pm
Forum: DM42
Topic: DM42 file read/write
Replies: 7
Views: 1185

Re: DM42 file read/write

I have a dream for my DM42: read/write into ascii files by the use of Virtual Variables : I imagine two virtual variables : “FRead” “FWrite” used as in these examples : “FWrite” ASTO 01 “MyFile1.txt” ASTO IND 01 ; this creates the file MyFile1.txt for writing (append mode) “HR” ASTO IND 01 ; write ...
by jonmoore
Wed Jun 03, 2020 11:29 am
Forum: Usage tips, tricks and problem reports
Topic: DM42 arrived today! Stack layout?
Replies: 35
Views: 4455

Re: DM42 arrived today! Stack layout?

Does it still happen from a "Guest" browser window? (Click the user icon in the top right corner and select "Guest".) That will have all the extensions disabled. Yes it's one of the first tests I tried. As a side note, I've set up my Linux Arm Chromium units to use minimal exten...
by jonmoore
Tue Jun 02, 2020 2:00 pm
Forum: Discuss!
Topic: Student Guides to some of the more challenging topics in the Physical sciences
Replies: 0
Views: 480

Student Guides to some of the more challenging topics in the Physical sciences

My work as a creative technologist involves relatively easy mathematical challenges, so much of my continued interest in mathematics, physics and engineering is driven by my children (two boys and a girl, each a year apart). They are very competitive (with each other, as well as generally) and all s...