Where is the PRGM hole ?

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HPMike
Posts: 62
Joined: Fri Jul 21, 2017 9:01 pm
Location: DFW, Texas

Where is the PRGM hole ?

Post by HPMike » Wed Dec 20, 2017 3:04 pm

My calculator SN: 00159 is missing the PRGM hole in the back of the case and there is no label as well. Did I receive a defective case back, and has this occurred with other units ? If so, can you send me a replacement back ?
DM15L, S/N 00548. DM42, SN: 00159.

grsbanks
Posts: 677
Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK

Re: Where is the PRGM hole ?

Post by grsbanks » Wed Dec 20, 2017 3:12 pm

It's not needed in the production models. In fact it was never needed in the beta units either :)
Not SwissMicros staff, just an enthusiast.

HPMike
Posts: 62
Joined: Fri Jul 21, 2017 9:01 pm
Location: DFW, Texas

Re: Where is the PRGM hole ?

Post by HPMike » Wed Dec 20, 2017 3:17 pm

Thanks ! So do you just press RESET only when doing a firmware update ?
DM15L, S/N 00548. DM42, SN: 00159.

Michael
Site Admin
Posts: 227
Joined: Wed Apr 05, 2017 9:31 pm

Re: Where is the PRGM hole ?

Post by Michael » Wed Dec 20, 2017 3:19 pm

HPMike wrote:
Wed Dec 20, 2017 3:17 pm
Thanks ! So do you just press RESET only when doing a firmware update ?
Correct

Michael
Site Admin
Posts: 227
Joined: Wed Apr 05, 2017 9:31 pm

Re: Where is the PRGM hole ?

Post by Michael » Wed Dec 20, 2017 3:20 pm

Michael wrote:
Wed Dec 20, 2017 3:19 pm
HPMike wrote:
Wed Dec 20, 2017 3:17 pm
Thanks ! So do you just press RESET only when doing a firmware update ?
Correct
well, actually not even that is needed once the calculator is in bootloader mode

grsbanks
Posts: 677
Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK

Re: Where is the PRGM hole ?

Post by grsbanks » Wed Dec 20, 2017 3:21 pm

HPMike wrote:
Wed Dec 20, 2017 3:17 pm
Thanks ! So do you just press RESET only when doing a firmware update ?
If you're using a Windows machine then you don't even need it then. It's handy for, well... resetting the DM42 in the event that it hangs in such a way that the firmware can't detect the problem and give you a software means to reset.

Users of POSIX-compliant O/Ses such as MacOSX and Linux, which use dfu-util, do have to use the reset button.
Not SwissMicros staff, just an enthusiast.

HPMike
Posts: 62
Joined: Fri Jul 21, 2017 9:01 pm
Location: DFW, Texas

Re: Where is the PRGM hole ?

Post by HPMike » Wed Dec 20, 2017 3:54 pm

Great ! Sounds like firmware updates on the DM42 are a lot easier and more reliable than on the DM15L.
DM15L, S/N 00548. DM42, SN: 00159.

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Walter
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Joined: Tue May 02, 2017 9:13 am
Location: Close to FRA, Germany

Re: Where is the PRGM hole ?

Post by Walter » Wed Dec 20, 2017 5:00 pm

While we are at it: what was the PRGM hole for?
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

grsbanks
Posts: 677
Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK

Re: Where is the PRGM hole ?

Post by grsbanks » Wed Dec 20, 2017 7:13 pm

I'm not 100% certain of this so I'm happy to be corrected, but I believe that the purpose of that button was to throw the CPU into a mode whereby you could replace the bootloader (as opposed to use the bootloader to update the firmware).
Not SwissMicros staff, just an enthusiast.

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