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Re: DM 48 .... WHY NOT ?!!!

Posted: Thu Mar 07, 2019 4:46 pm
by Thomas Okken
Walter wrote:
Thu Mar 07, 2019 4:23 pm
They would make Free42 operating more RPL-like and I'm uncertain whether this is an advantage or the opposite.
RPL is a beautiful design in and of itself (its tendency to lead to write-only stackrobatics notwithstanding), but it doesn't mix well with the HP-42S design, in my opinion. I was never a big fan of the unlimited-stack patch in Byron Foster's Free42 adaptation. The patch was well done, but the result was just not a 42S any more, again, in my opinion. And of course a big stack breaks many HP-42S programs, and I and many Free42 users value that compatibility.

Which isn't to say that Free42 couldn't be enhanced in other useful ways, like directories, local variables, unlimited RTN stack, etc. But those could all be done without breaking the existing design or HP-42S compatibility.

Re: DM 48 .... WHY NOT ?!!!

Posted: Fri Mar 08, 2019 12:17 pm
by gopper
Walter wrote:
Thu Mar 07, 2019 4:23 pm
AFAIK, both wishes would affect Free42. They would make Free42 operating more RPL-like and I'm uncertain whether this is an advantage or the opposite.
Yes, that is the point… with those options it’s more an RPL calculator, for guys like me accustomed to use RPL.
Anyway, it’s a question of time to get used to a new system. After several months using the DM42 I feel comfortable with RPN.
Walter wrote:
Thu Mar 07, 2019 4:23 pm
Just for curiosity: What do you want to do with >10 (e.g. 12) registers on the stack?
Maybe it’s a weird way to work, but I used the stack as a register on sequential calculations/problems (like printing calculators) … for example:
  • Total power DB1: N1
    Total power DB2: N2
    .
    .
    Total power DB15: N15
  • Total power of the plant: Sum of powers of DB.
With the DM42 I didn’t have another option that change my way of work.
Thomas Okken wrote:
Thu Mar 07, 2019 4:46 pm
Which isn't to say that Free42 couldn't be enhanced in other useful ways, like directories, local variables, unlimited RTN stack, etc. But those could all be done without breaking the existing design or HP-42S compatibility.
Probably it’s the best option to avoid confusions and mistakes… not to change the basic behavior and principles of the 42s and, when it can be possible, develop a new RPL machine (DM48 or similar).

Greatings.
Gop.

Re: DM 48 .... WHY NOT ?!!!

Posted: Fri Mar 08, 2019 3:14 pm
by Walter
gopper wrote:
Fri Mar 08, 2019 12:17 pm
Walter wrote:
Thu Mar 07, 2019 4:23 pm
Just for curiosity: What do you want to do with >10 (e.g. 12) registers on the stack?
Maybe it’s a weird way to work, but I used the stack as a register on sequential calculations/problems (like printing calculators) … for example:
  • Total power DB1: N1
    Total power DB2: N2
    .
    .
    Total power DB15: N15
  • Total power of the plant: Sum of powers of DB.
With the DM42 I didn’t have another option that change my way of work.
That's weird indeed. How about pressing [+] a little earlier? ;)
gopper wrote:
Fri Mar 08, 2019 12:17 pm
Thomas Okken wrote:
Thu Mar 07, 2019 4:46 pm
Which isn't to say that Free42 couldn't be enhanced in other useful ways, like directories, local variables, unlimited RTN stack, etc. But those could all be done without breaking the existing design or HP-42S compatibility.
Probably it’s the best option to avoid confusions and mistakes… not to change the basic behavior and principles of the 42s and, when it can be possible, develop a new RPL machine (DM48 or similar).
1 [+]

Re: DM 48 .... WHY NOT ?!!!

Posted: Mon Mar 11, 2019 12:48 am
by CalcFreak
So, are the DM48s available for pre-order yet?

:lol:

Re: DM 48 .... WHY NOT ?!!!

Posted: Fri Mar 15, 2019 8:26 pm
by zx_spectrum
I already lost hope that SM would ever make the DM48 .... they seam to be very uninterested
so i got my self 3 units of hp50G in case my precious 48G dies

Re: DM 48 .... WHY NOT ?!!!

Posted: Tue Mar 19, 2019 10:17 am
by gopper
It's not a question of interest I think... in other thread Michael wrote:
Michael wrote:
Sun Nov 26, 2017 10:44 pm
The ROM for the 48 is freely available from HP for personal use only. Not for commercial use.
And there is no simulator yet for the HP-48 similar to Free42.
Otherwise we would be happy to make a clone of it 8-)
Greatings.
Gop.