DM41

This is the place to discuss the usage of DM1x/DM41 machines and to share any tips & tricks you may have stumbled across.

If discussing a specific model, please ensure that you prefix topic subjects with the model number this way:

[DM41] How to change the number of program steps available
x55
Posts: 19
Joined: Sun Jul 26, 2020 7:32 am

DM41

Post by x55 »

Don't know where to post this question, so here.

Microcode: the portrait version uses the HP internal ROMs. Is that straight or modified to accommodate the new-to-SM functions? By 'straight' I mean: are HP's original entry points and code locations intact (e.g. as in PPC's NOMAS listings) and, if not, is there any difference documentation? Thanks.
--
HP: 55/67/41C/HP-IL/ProtoCODER*/41CL/MLDL**/41CX/16C/71B/42S/33s***/35s ...
DM: 42 ...
Etc: If a calculator has equals, why buy one unless it's the cheapest?
* ProtoTECH, USA / ** Eramco, Netherlands / *** Carly Failurina model
x55
Posts: 19
Joined: Sun Jul 26, 2020 7:32 am

Re: DM41

Post by x55 »

And second request, except that I know what they're about, Jake Schwartz's exhaustive documentation indices, journal lists, etc, are incomprehensible to me when viewed as CD ordering tools. Can anyone tell me just what I should order to get everything 41-related that he publishes? Thanks.
--
HP: 55/67/41C/HP-IL/ProtoCODER*/41CL/MLDL**/41CX/16C/71B/42S/33s***/35s ...
DM: 42 ...
Etc: If a calculator has equals, why buy one unless it's the cheapest?
* ProtoTECH, USA / ** Eramco, Netherlands / *** Carly Failurina model
User avatar
pcscote
Posts: 142
Joined: Tue May 02, 2017 12:12 pm
Location: Near Montréal, Québec, Canada

Re: DM41

Post by pcscote »

x55 wrote:
Sun Sep 06, 2020 4:40 pm
And second request, except that I know what they're about, Jake Schwartz's exhaustive documentation indices, journal lists, etc, are incomprehensible to me when viewed as CD ordering tools. Can anyone tell me just what I should order to get everything 41-related that he publishes? Thanks.
To have everything on the HP-41 and on HP calculators in general, you need the following: Sylvain

edit: typos
[DM1x/DM1xL/DM41/DM41L/DM41X/DM42]
rprosperi
Posts: 1096
Joined: Mon Apr 24, 2017 7:48 pm
Location: New York

Re: DM41

Post by rprosperi »

x55 wrote:
Sun Sep 06, 2020 4:40 pm
And second request, except that I know what they're about, Jake Schwartz's exhaustive documentation indices, journal lists, etc, are incomprehensible to me when viewed as CD ordering tools. Can anyone tell me just what I should order to get everything 41-related that he publishes? Thanks.
I had a different interpretation of what you were asking about Jake's PPC Archive collection, so I'll try a different kind of reply, though I agree with Sylvain's more thorough, larger scope, answer.

If you mean which CDs to order, the various material on each CD is broken down by the type of publication or document, rather than by HP model, so it's really impossible to say, e.g. 'only get CD1 and you'll have all the 41 material'. For example the PPC Calculator Journal Issues are on CD1, HP's great Key Notes newsletter and PPC ROM manual are on CD2, HPCC's Datafile collection is on CD3 and all the HP-related conference proceedings and PPC-Australia (one of the most active places for 41 stuff, especially MCODE) is on CD4.

However, the PPC archive has grown so much in the last few years, that Jake now sells the entire collection on a single 16GB USB Thumb Drive, which is MUCH faster and easier to navigate, so I recommend getting that.

For the initial question, the DM41 machines (and the forthcoming DM41X) run the 41CX original ROMs, so all entry points are preserved just as documented in the VASM listing. However, note that the PPC NOMAS VASM listing is for the 41C, while the DM41/DM41L are based on the 41CX (which added the Time and Extended Func/Mem modules, plus a few other related functions).
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
x55
Posts: 19
Joined: Sun Jul 26, 2020 7:32 am

Re: DM41

Post by x55 »

rprosperi wrote:
Mon Sep 07, 2020 12:10 am
I had a different interpretation of what you were asking about Jake's PPC Archive collection, so I'll try a different kind of reply, though I agree with Sylvain's more thorough, larger scope, answer.
Thanks. Your interpretation was correct. All these scattered bits were what was foxing me and it wasn't clear that the USB was the fix. Now I have another problem: Jake's USB payment link throws a 404 Not Found error ans he seems not to be answering email. Any idea how to contact him these days?

Sorry for the delayed reply. I got myself onto the wrong side of a lockdown line and things have been disrupted for months.
For the initial question, the DM41 machines (and the forthcoming DM41X) run the 41CX original ROMs, so all entry points are preserved just as documented in the VASM listing. However, note that the PPC NOMAS VASM listing is for the 41C, while the DM41/DM41L are based on the 41CX (which added the Time and Extended Func/Mem modules, plus a few other related functions).
I think I meant the VASM listing. NOMAS was the partial synonym that hit the keyboad.
--
HP: 55/67/41C/HP-IL/ProtoCODER*/41CL/MLDL**/41CX/16C/71B/42S/33s***/35s ...
DM: 42 ...
Etc: If a calculator has equals, why buy one unless it's the cheapest?
* ProtoTECH, USA / ** Eramco, Netherlands / *** Carly Failurina model
x55
Posts: 19
Joined: Sun Jul 26, 2020 7:32 am

Re: DM41

Post by x55 »

pcscote wrote:
Sun Sep 06, 2020 8:51 pm

To have everything on the HP-41 and on HP calculators in general, you need the following…
Thanks. Appreciated. Sorry for long-delayed reply…
--
HP: 55/67/41C/HP-IL/ProtoCODER*/41CL/MLDL**/41CX/16C/71B/42S/33s***/35s ...
DM: 42 ...
Etc: If a calculator has equals, why buy one unless it's the cheapest?
* ProtoTECH, USA / ** Eramco, Netherlands / *** Carly Failurina model
rprosperi
Posts: 1096
Joined: Mon Apr 24, 2017 7:48 pm
Location: New York

Re: DM41

Post by rprosperi »

x55 wrote:
Thu Oct 29, 2020 7:19 am
Now I have another problem: Jake's USB payment link throws a 404 Not Found error ans he seems not to be answering email. Any idea how to contact him these days?
The site says: For Paypal, please use "jakes@pahhc.org" as the destination.

Just send the listed payment to that address is all you need to do, but I'll also check w/Jake to make sure he see's that and all is well.

I hope you're ready to read.... :)
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
User avatar
pcscote
Posts: 142
Joined: Tue May 02, 2017 12:12 pm
Location: Near Montréal, Québec, Canada

Re: DM41

Post by pcscote »

rprosperi wrote:
Thu Oct 29, 2020 1:43 pm
I hope you're ready to read.... :)
I long for the day when the knowledge transfer will be done in a similar fashion as shown in the MATRIX. 8-)
[DM1x/DM1xL/DM41/DM41L/DM41X/DM42]
dlachieze
Posts: 291
Joined: Thu May 04, 2017 12:20 pm
Location: France

Re: DM41

Post by dlachieze »

pcscote wrote:
Thu Oct 29, 2020 5:46 pm
rprosperi wrote:
Thu Oct 29, 2020 1:43 pm
I hope you're ready to read.... :)
I long for the day when the knowledge transfer will be done in a similar fashion as shown in the MATRIX. 8-)
I don't ;)
Learning is like traveling, the most important for me is the journey, not the destination.
DM42: 00425 - DM41X: β00066
User avatar
pcscote
Posts: 142
Joined: Tue May 02, 2017 12:12 pm
Location: Near Montréal, Québec, Canada

Re: DM41

Post by pcscote »

dlachieze wrote:
Thu Oct 29, 2020 6:14 pm
pcscote wrote:
Thu Oct 29, 2020 5:46 pm
rprosperi wrote:
Thu Oct 29, 2020 1:43 pm
I hope you're ready to read.... :)
I long for the day when the knowledge transfer will be done in a similar fashion as shown in the MATRIX. 8-)
I don't ;)
Learning is like traveling, the most important for me is the journey, not the destination.
Well, one does not exclude the other. :D
[DM1x/DM1xL/DM41/DM41L/DM41X/DM42]
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