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Firmware V31 for DM1x/DM41(L) units

Posted: Mon Oct 19, 2020 11:17 am
by grsbanks
Last month we uncovered a bug in firmware V30 for the DM1x/41 series of calculators that led to excessive power drain causing the calculators to eat through batteries at an unusually high rate. At the time, we urged users to revert to firmware V29 to avoid this problem pending a fix.

We have now fixed the power drain issue and we're releasing V31.

V31 is basically what V30 should have been. To see the details of what was new in V30, please refer to the V30 release announcement.

The firmware can be downloaded from https://technical.swissmicros.com/voyager/firmware/ Firmware update instructions are available here: https://technical.swissmicros.com/voyag ... tions.html

Firmware SHA1 checksums are:

Code: Select all

c4cb2cbbc1ef4a1e159c2c49a7e1f026bbdf1c05  DM10_31.hex
0c840775c9aad74c495ca4a09403bb093b09515d  DM11_31.hex
e9da49b07f36e28f476ae6afba5e494e0b14cd95  DM12_31.hex
6ff04ae7b60b945a21f21bba9023382c5c8e131b  DM15_31.hex
108362e085c9d5a8af474bda6adcdf1b818c25fa  DM15_M1B_31.hex
d5745d4c522f713935e1c4039e2c34ed66550706  DM15_M80_31.hex
c4fe970d5d8f7e337560484e6d7eb10465da450a  DM16_31.hex
0da77f6ac2228cb6283afac398ac5f3af395168c  DM41_31.hex

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Thu Oct 22, 2020 6:20 pm
by rawi
Unfortunately this does not work wirh my DM 15L. I do not know what type of DM15L I have. Perhaps there are some key combinations to find out but that parts of the manual are not yet available. I tried both. When pushing the reset button I first get the message "serial console" and then "PR error". What can I do?
I would like to install because I have the problem with the power drain...

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Thu Oct 22, 2020 6:26 pm
by WillMarchant
Press and hold the "E" key while you turn the calculator on. The second word on the top left will be the memory size. At least it is on my DM15.

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Thu Oct 22, 2020 6:32 pm
by rawi
Thank you very much, it worked!

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Thu Oct 22, 2020 7:04 pm
by grsbanks
All recent DM15 calculators can and probably should be flashed with the M1B variant. The M80 variant was for earlier models that didn't have enough RAM and the vanilla version is really only there for those who want to have something as close as possible to the original HP-15C, including memory constraints.

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Thu Oct 22, 2020 7:04 pm
by bernouilli
There is only one type of dm15L, the amount of memory it has depends on the firmware you put in.

Edit : I didn’t know there were different hardware for the dm15L

Re: Firmware V31 for DM1x/DM41(L) units

Posted: Fri Oct 23, 2020 3:15 pm
by salvomic
I updated smoothly my DM-16 in Windows inside macOS 10.15.7 with Parallels 16.1, however this was slow process, but simple, with some issue with the USB port recognition...
All went ok.

I have no "Mac ports" installed. Many of us, nowadays, use Homebrew, instead. I would suggest to MS to give also support for HB, to update firmware directly in macOS without passing through Windows or Mac Ports...
Thank you,

Salvo