Search found 185 matches

by ijabbott
Sat Sep 26, 2020 12:29 pm
Forum: Testing
Topic: MathJax, anyone?
Replies: 3
Views: 69

Re: MathJax, anyone?

Nice work! Does it support both the "inline" and the "display" style?
by ijabbott
Sat Sep 26, 2020 12:27 pm
Forum: DM42
Topic: DM42 with homemade printer
Replies: 9
Views: 231

Re: DM42 with homemade printer

Michael wrote:
Sat Sep 26, 2020 12:19 am
Very nice. Congrats!
I've been thinking of this too ...
May 2021? :)
by ijabbott
Sat Sep 19, 2020 10:04 am
Forum: Software Library
Topic: Machine accuracy
Replies: 4
Views: 246

Re: Machine accuracy

For HP50G 1+10E-12-1 = 10E-12 1+5E-12-1 = 0 If 10E-12 were the EPS for the HP 50g, then 10E-12 would be "the smallest machine value that can be added to 1.0 that gives a result distinguishable from 1.0" (the definition of EPS given in the linked PDF). But it's not the smallest. For example, 9E-12 i...
by ijabbott
Tue Sep 08, 2020 10:15 pm
Forum: Usage tips, tricks and problem reports
Topic: Question about updating the firmware on the DM42 calc.
Replies: 13
Views: 602

Re: Question about updating the firmware on the DM42 calc.

I think whichever state file was last saved or loaded before an update gets reloaded automatically after an update. The STATE.f42 file that has been saved is automatically loaded after an update. State files saved with other names are NOT loaded. That doesn't seem to agree with the source code. Fro...
by ijabbott
Mon Sep 07, 2020 10:33 pm
Forum: Usage tips, tricks and problem reports
Topic: Question about updating the firmware on the DM42 calc.
Replies: 13
Views: 602

Re: Question about updating the firmware on the DM42 calc.

I think whichever state file was last saved or loaded before an update gets reloaded automatically after an update.
by ijabbott
Fri Aug 21, 2020 8:43 pm
Forum: Usage tips, tricks and problem reports
Topic: QuickRef HTML en Français
Replies: 14
Views: 828

Re: QuickRef HTML en Français

My browser translated the French posts to English automatically. It even translated the filenames in the posts, so that HELP_fr.zip appeared as HELP_en.zip. (I have attempted to flummox that in the reverse direction for this post.)
by ijabbott
Sun Aug 16, 2020 9:33 am
Forum: Hardware issues
Topic: DM42 Battery level always= 1.21v ? Works fine?
Replies: 2
Views: 261

Re: DM42 Battery level always= 1.21v ? Works fine?

It sounds like the same problem as in this thread: BAT indicator stuck on. (That was for a DM41X beta unit, but the electronic components are the same as DM42.)
by ijabbott
Fri Aug 07, 2020 9:11 pm
Forum: Update Announcements
Topic: UPDATE: DMCP-3.17 / DM42-3.15rc1
Replies: 33
Views: 9240

Re: UPDATE: DMCP-3.17 / DM42-3.15rc1

cappy wrote:
Tue Aug 04, 2020 9:55 pm
It's been a long time since this has become an RC. Are there any serious bugs with this RC?
DMCP 3.18 and DM42 3.15 were released on 2020-03-20.
by ijabbott
Sun Jun 28, 2020 7:55 pm
Forum: Discuss!
Topic: Use the IR of DM42(or any HP calculator) for commercial IR?
Replies: 25
Views: 2800

Re: Use the IR of DM42(or any HP calculator) for commercial IR?

Although i own a HP82240, I'm experimenting to create a RedEye to serial interface using eighter a microcontroller or an FPGA (trying both paths) The Idea is to hookup small ticket printers i found in my junkbox. It'l take some time to get results but if you are interested i'll drop some posts late...
by ijabbott
Wed Jun 24, 2020 11:55 pm
Forum: Discuss!
Topic: Torr and mmHg ??
Replies: 30
Views: 2413

Re: Torr and mmHg ??

... NIST throws away the digits saying compressibility of mercury is varying. But at the same time they also don't chop off c's digits because of uncertainty to the medium ... Not sure I got your point. What c are you talking about? :? The c I know is speed of light in vacuum - no medium per defini...