DM32 Info - John's Vademecum

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====== DM32 Info ======

** The new entry-Level do-it-all machine **

Release June 2023 with Beta Firmware - community providing feedback of bugs and errors
to help drive firmware development

[[https://forum.swissmicros.com/viewforum.php?f=33]]


===== Photos =====


{{  :public:calculator:info:dm32_2.jpg?400  |}}

/*

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*/
===== Purchase Information =====

  * Date   : July 2023
  * From   : Swiss Micros
  * Price  : CHF249 + CHF70 DHL Delivery = CHF319 = £296
  * Serial : 00812


===== Firmware =====

^Date^DM32 Version^DMCP Version^Firmware Files^Comments^
| 20/07/23 | 2.03 | 3.50t25 | {{ :public:calculator:info:dmcp5_flash_3.50t25_dm32-2.03.zip }} |Equation Solver Bug - sometimes shows LOG(0) or DIVIDE BY 0 - also Complex powers bug -  Forum says "fixed in next F/W release" |
| 01/08/23 | 2.04 | 3.50t29 | {{ :public:calculator:info:dmcp5_flash_3.50t29_dm32-2.04.zip }} |Bugs I'd spotted in 2.03 now resolved | 
| 13/09/23 | 2.05 | 3.50t31 | {{ :public:calculator:info:dmcp5_flash_3.50t31_dm32-2.05.zip }} |4-line prog editor, 4-line EQN list & more|
| 09/11/23 | 2.06 | 3.50t33 | {{ :public:calculator:info:dmcp5_flash_3.50t33_dm32-2.06.zip }} |Various fixes & new features |
| 06/05/24 | 2.07 | 3.50t36 | {{ :public:calculator:info:dmcp5_flash_3.50t36_dm32-2.07.zip }} |Various new features including "remote calls" to routines in non-loaded calculator "states" |
| 06/05/24 | 2.08 | 3.50t38 | {{ :public:calculator:info:dmcp5_flash_3.50t38_dm32-2.08.zip}} |USB Speed Up and other new features |
|07/05/24 | 2.09 | 3.50t38 | {{ :public:calculator:info:dmcp5_flash_3.50t38_dm32-2.09.zip }} | Right-align stack display option|
|20/08/24 | 2.10 | 3.51 | {{ :public:calculator:info:dmcp5_flash_3.51_dm32-2.10.zip }} | Official Release Version |
|24/01/26 | 2.11 | 3.56 | {{ :public:calculator:info:dmcp5_flash_3.51_dm32-2.10.bin }} | Minor bug-fixes |


==== Changes ====


++++ Changelog | 

=== DM32 v2.11: 2025-12-05 ===
Fixes

    Fixed: crash after using equation solver with Flag-11 (forum)
    Font design: visually improved a selection of glyphs in the SwissKeys font (the "bold" font).


=== DM32 v2.10: 2024-08-17===
Fixes

    Fixed: Difference in error messages (STAT ERROR and INVALID y^x)
    Fixed: SOLVE (i) asks for solve variable


=== DM32 v2.09: 2024-05-06===

Enhancements

    Added RANDSEED to statefile
    Statefile parsing enhancements
    Stack Right-align option (see in doc)

=== DM32 v2.08: 2024-03-18===

Enhancements

    Added CPU frequency switching when powered from USB
    Added remote calls from CALC mode
    Added Extended GTO functionality (see in doc)
    Added support for automatic load of dependent states (see in doc)

Fixes

    Fixed: The '0' style doesn't match register font in SHOW box
    Fixed: F3 (SST) should act only if no other key processing is pending
    Fixed: F3 (SST) long press to NULL behavior
    Fixed: Remote XEQ calls to current context
    Fixed: First remote XEQ call should clear remote call stack
    Fixed: Current state filename should be pre-selected in "Save" dialog


===DM32 v2.07: 2023-12-08===


Enhancements

    Added remote XEQ functionality (see in manual)
    Added SHOW view of EQN message
    SHOW extended to all program lines in program mode

Fixes

    F2 key (i.e. debug view toggle) deactivated for non-CALC modes and during number entry
    Fixed USB disk id to 0483:5720 so it corresponds to USB MSC by STM
    Fixed: Program SOLVE ending in "NO ROOT FOUND" prevents subsequently keyed XEQ from running (until pressing [R/S])
    Fixed: Number entered as '1E-' ([E][+/-]) should be interpreted as '1'
    Fixed: Message triangle cut-off after File->Load Clean State
    Fixed: Left/right scrolling of long EQN message (i.e. EQN in PRGM mode with flag10 set) doesn't work


===DM32 v2.06: 2023-11-01 === 


    Added "Debug View" (see in manual)
    Added Step-out and Step-over (see in manual)
    SHOW box style changed to better match overall look
    Fixed: Sometimes SHOW displays "SHOW" instead of expected text on long key press
    Fixed: Wrong CLEAR menu in PRGM and EQN mode after elaborated key combinations
    SHOW hold isn't killed by shift presses (simplifies screenshot invocation)
    SHOW hold isn't canceled by screenshot
    Fixed: Integration ends on overflow when Flag5=0 (should give an integration result) .. this also fixed a problem with restarting integration after an overflow
    Fixed: Memory corruption in EQN list (reported by Raul). Exhibit itself during EQN edit by displaying "NO EQN" on other lines and all those equations are lost.

++++
 
For the full list see [[https://technical.swissmicros.com/dm32/firmware/history.html]]

For current USER MANUAL see [[https://technical.swissmicros.com/dm32/doc/dm32_user_manual.html]]




===== RTC Correction =====

  * approx. error : -23ppm (-2.0s/d)
  * Correction factor C from ''C = 2^20 P /(10^6 + P)''
  * Approximations : 
    * ''C = 1.04858 P''
    * ''P = 0.953674 C''
  * Calculated ''C = 24.2''

Put a text file ''/rtccalib.cfg'' in root directory of FAT drive with contents:
<code>
24.2
</code>

==== 2023 ====

^Start^Stop^Accumulated Error (s)^Rate Error (s/d)^Comments^
| 20/07/23 | 22/07/23   | -3.5 | -2.0   | First 2 days initial test. -23ppm |
| 22/07/23 | 22/11/23  | +17.3 | +0.1 | with correction 24.2 (22.9ppm) applied = slightly over-corrected? |

==== Update January 2026 ====

Using my [[..:..:miscellany:watches:watchcheck|python Watchcheck]]

^Date Start^Date Check^Delta^Latest Rate Error^Average Rate Error^Comments^
|27/01/26|  | +4.4 |  |  | New Period. Correction 22.9ppm |





===== DM32 Info =====

  * Firmware      : [[https://technical.swissmicros.com/dm32/firmware/]]
  * YouTube videos by NA McBee : [[https://www.youtube.com/@N.A._McBee/video]]
  * Swissmicros forum : [[https://forum.swissmicros.com/viewforum.php?f=33&sid=2185cf0ed161a970070277183ff137c0]]
 

==== Hardware / Firmware issue ====

I received the following email from Swiss Micros in 8th March 2024 explaining a hardware change that's required to early production units to ensure correct operation with the latest firmware, which allows the processing speed to increase when powered via USB (as per the DM41X and DM42).

++++ email re: hardware mod | 

<code>
Dear valued customer,

We appreciate your decision to purchase the DM32 calculator. 
As one of our early adopters, your support means a lot to us.

 

In our initial firmware versions, we restricted the CPU speed 
to 48MHz due to power limitations from the CR2032 battery. 
However, in upcoming firmware updates, we're introducing the ability 
to switch to 160MHz when powered by USB. It's crucial to note that 
upon unplugging the USB, the CPU speed must swiftly revert to 48MHz 
to prevent battery voltage drop and subsequent CPU resets.

Regrettably, we've identified an issue affecting units purchased 
before December 2023. In specific scenarios, the CPU speed doesn't 
transition quickly enough, potentially leading to calculator resets.

This may happen upon USB disconnection if the device is engaged in 
processing tasks rather than merely awaiting user input or being powered down.

All units ordered post-November 2023 have been enhanced to ensure consistent 
performance. This modification entails replacing R4 with a 22k resistor 
instead of the previous 100k one.

To address this issue, we offer several solutions:
 

    If you're comfortable soldering, replacing R4 is a straightforward fix. We're happy to dispatch a replacement 
    resistor to you in an envelope, see  https://www.swissmicros.com/product/r4-22k-resistor
    
    Alternatively, you can send your DM32 to us, and we'll replace the resistor and return it to you promptly, 
    see https://www.swissmicros.com/product/rma
    
    We anticipate a new batch of PCBs to be available in approximately three months. Once ready, we can send you 
    a replacement PCB. We kindly request that you return the replaced PCB to us. 
    
    https://www.swissmicros.com/product/dm32-replacement-pcb

 

We sincerely apologize for any inconvenience caused and appreciate your 
understanding and cooperation in resolving this matter.
 
Thank you for your continued support and patience.

 

Best regards

Michael Steinmann

SwissMicros

</code>

++++


I find the DM32 plenty fast enough running on batteries, so I'm not necessarily going to be plugging it it to boost its performance **but** I do want to stay up to date with firmware changes and don't want to risk any problems, so I've ordered the replacement SMD resistor and plan to swap it myself.


** update 24/01/26 ** - I //think// I did the swap.... after receiving the new resistor, not sure of the date.... I'm fairly sure I did, anyway!



===== HP-32Sii Owner's Manual =====

Download from [[https://literature.hpcalc.org/]]

  * HP-32sii Owner's Manual : [[https://literature.hpcalc.org/community/hp32sii-om-en.pdf]]


===== Further Information =====


{{tag>calculator dm32}}
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