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
Post Reply
x55
Posts: 16
Joined: Sun Jul 26, 2020 5:32 am

DM41

Post by x55 » Sun Sep 06, 2020 2:22 pm

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: 16
Joined: Sun Jul 26, 2020 5:32 am

Re: DM41

Post by x55 » Sun Sep 06, 2020 2:40 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.
--
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: 117
Joined: Tue May 02, 2017 10:12 am
Location: Near Montréal, Québec, Canada

Re: DM41

Post by pcscote » Sun Sep 06, 2020 6:51 pm

x55 wrote:
Sun Sep 06, 2020 2:40 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: 872
Joined: Mon Apr 24, 2017 5:48 pm
Location: New York

Re: DM41

Post by rprosperi » Sun Sep 06, 2020 10:10 pm

x55 wrote:
Sun Sep 06, 2020 2:40 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, DM10L: 071/100

Post Reply