Search found 21 matches

by budmur
Fri Dec 27, 2019 3:41 am
Forum: Discuss!
Topic: Non-numeric stuff in calculations
Replies: 12
Views: 4764

Re: Non-numeric stuff in calculations

Walter, that's a really intriguing question, and I really had to think about it. I'm a Civil Engineer, so in real life there's really no way to encounter a NaN that's not an error, so I started thinking about your question more abstractly. I encounter the inverse pretty regularly- that is, I find te...
by budmur
Tue Dec 10, 2019 7:32 pm
Forum: Discuss!
Topic: Possibility for a financial calculator? (apart from the DM12)
Replies: 11
Views: 4972

Re: Possibility for a financial calculator? (apart from the DM12)

It's only a waste of time if you're not personally interested in it. That said, the 17-series would be a challenge, since it's from an era when HP was copyrighting their ROMs, and 3rd party solutions are closed source.
by budmur
Mon May 20, 2019 9:11 pm
Forum: Hardware issues
Topic: Battery life
Replies: 40
Views: 21781

Re: Battery life

akaTB wrote:
Mon May 20, 2019 8:49 pm

The magic number for me is "1".

This is my magic number as well. FWIW, my board is V3, Copyright Date 2017.
by budmur
Sun Apr 14, 2019 2:56 pm
Forum: Discuss!
Topic: Landscape DM42?
Replies: 126
Views: 46242

Re: Landscape DM42?

mezoganet wrote:
Sun Apr 14, 2019 12:44 pm

Hp41 was the best, do not change anything.
Maybe that's the answer. If someone could shove the 41 CX rom into the DM42, then we could be reassigning keys and manually typing in functions like it was 1979.
by budmur
Fri Apr 05, 2019 3:24 pm
Forum: Software Library
Topic: PUSH/POP stack
Replies: 6
Views: 5104

Re: PUSH/POP stack

As I understand it, one disadvantage of this method is that the stack can't contain a matrix. The other way (using registers) would be able to support a matrix on the stack.
by budmur
Fri Mar 29, 2019 3:00 pm
Forum: Hardware
Topic: Case for Voyager 'L' size
Replies: 21
Views: 11224

Re: Case for Voyager 'L' size

... a copy of Avogardro's Numbers (a small reference book), ... Is that something that's obtainable for the mere mortals on this forum? :) 20190329_094838.jpg It looks like it's out of print. It was compiled by Herbst and Schiller, copyright 1988. Mine is an artifact from my University days. It's a...
by budmur
Thu Mar 28, 2019 2:14 am
Forum: Hardware
Topic: Case for Voyager 'L' size
Replies: 21
Views: 11224

Re: Case for Voyager 'L' size

For my DM42, I use a hard case for the HP-35S. It holds the unit securely, and has enough room for a HP-42S quick reference, a copy of Avagardro's Numbers (a small reference book), and a few business cards.
by budmur
Mon Mar 18, 2019 1:54 am
Forum: Usage tips, tricks and problem reports
Topic: Thoughts on DM42 User Manual
Replies: 3
Views: 3126

Thoughts on DM42 User Manual

One thing that bugs me (not really, but it is something that I've noticed) is that the DM42 User Manual is written for someone who is familiar with the HP-42S or Free42, and needs to know how to do DM42-specific things, like update firmware, change system setttings, save files and state-files, etc. ...
by budmur
Sun Mar 17, 2019 3:58 am
Forum: DM42
Topic: Spreadsheet App for DM42
Replies: 48
Views: 23161

Re: Spreadsheet App for DM42

If you're working within a single equation, the Solver is an awesome tool. You can manipulate many variables and do what-if tests quickly. In the 90s I was running a rad lab in the field and this saved me sooooo many hours.
by budmur
Sun Jan 27, 2019 5:53 am
Forum: Hardware issues
Topic: buttons that don't register well
Replies: 195
Views: 79664

Re: buttons that don't register well

I had the DM 41 (same hardware as the 15) before the 42 was available, and didn't notice any problems with the keyboard. The keyboard on the 42 is generally fine; problems seem to be the exception, rather than the rule. I wouldn't worry too much about it, it really is a beautiful product.