Search found 797 matches

by grsbanks
Wed Jun 23, 2021 6:31 pm
Forum: DM41X
Topic: [SOLVED] Debugging printing to HP82240B
Replies: 11
Views: 292

Re: [SOLVED] Debugging printing to HP82240B

There is no polarity. The original PSU provides AC to the printer. That is then rectified and filtered inside the printe.
by grsbanks
Wed Jun 23, 2021 3:53 pm
Forum: DM41X
Topic: [SOLVED] Debugging printing to HP82240B
Replies: 11
Views: 292

Re: [SOLVED] Debugging printing to HP82240B

Does the printer have a label on it from another company? This printer was OEM'd by HP to a few other companies and sold under those labels, and one of them moved the IR window to the back side as the printer was installed in/on some other equipment where the front of the unit was not accessible, t...
by grsbanks
Wed Jun 16, 2021 11:41 am
Forum: DM41X
Topic: Negative Cube Roots
Replies: 5
Views: 228

Re: Negative Cube Roots

It calculates the \(n\)th root of \(x\) by computing \(e^{ln(x)/n}\)

If \(x\) is negative, it can't calculate \(ln(x)\), hence the "DATA ERROR".
by grsbanks
Sat Jun 12, 2021 2:23 pm
Forum: Hardware issues
Topic: Cracked bezel
Replies: 4
Views: 473

Re: Cracked bezel

Drop me an e-mail at support@[you know the domain].
by grsbanks
Wed Jun 02, 2021 6:06 pm
Forum: DM42
Topic: DM42 versions and shipping question
Replies: 2
Views: 369

Re: DM42 versions and shipping question

Hi there. To answer your questions: 1) Yes. The unsold DM42 units with the older keyboard were removed from sale in September 2020 when the DM41X was released. From that point onwards, only DM42 units made with the same, improved keyboard as the new DM41X were sold and shipped. 2) Again, yes. Even i...
by grsbanks
Tue Jun 01, 2021 8:26 am
Forum: DM41X
Topic: Getting NAME ERR when I save program raw files
Replies: 66
Views: 9606

Re: Getting NAME ERR when I save program raw files

FWIW, this is covered in the manual. Para 6.2.4 specifically:

https://technical.swissmicros.com/dm41x ... ve_raw_pgm
by grsbanks
Fri May 28, 2021 12:36 pm
Forum: Discuss!
Topic: DM15L - origin of firmware routines ?
Replies: 5
Views: 771

Re: DM15L - origin of firmware routines ?

All of the DM1x and DM41/L/X machines are in fact emulators running the original HP ROMs, sometimes lightly patched to accomodate the hardware and any extensions provided by SwissMicros. E.g. the DM41/DM41L runs a version of the HP-41CX mainframe patched to accommodate the landscape format keyboard....
by grsbanks
Thu May 13, 2021 2:49 pm
Forum: SwissMicros Firmware Update Announcements
Topic: UPDATE: DMCP 3.21 / DM42-3.19
Replies: 5
Views: 1795

UPDATE: DMCP 3.21 / DM42-3.19

DM42 V3.19 This release of the DM42 firmware is an update to Free42 V3.0.3. V3.19 kicks off the quarterly update cycle as mentioned in the DM42 Firmware Update Policy . The next update after this one will be in August 2021 as long as there are updates to Free42 that are practical to merge into the ...
by grsbanks
Wed May 12, 2021 7:09 pm
Forum: DM42
Topic: Deleting the .END. (maybe)
Replies: 8
Views: 2036

Re: Deleting the .END. (maybe)

Please refer to p118 of the (English language) manual of the HP-42S. The .END. is the permanent END . Program ENDs Programs are separated from one another with END instructions. The last program in memory uses the permanent END, which appears in the display as .END. . After the first program in memo...
by grsbanks
Wed May 12, 2021 9:55 am
Forum: DM1x/DM41
Topic: Wax your DM12,15,16 etc.
Replies: 2
Views: 1120

Re: Wax your DM12,15,16 etc.

Just for the avoidance of any doubt, this procedure of waxing the case of your calculator is neither suggested nor endorsed by SwissMicros. Should the wax product damage the calculator's casing in any way, this is not covered by the warranty.