Search found 5 matches

by J-F Garnier
Wed Feb 20, 2019 10:07 am
Forum: Discuss!
Topic: Little Problem with Complex Mathematics on Calculators
Replies: 23
Views: 2349

Re: Little Problem with Complex Mathematics on Calculators

My basic question was: why is i ∞ = 0 + i ∞ but it looks that (i ∞)^2 ≠ (0 + i ∞)^2 ? Reasoning for the second equation: (i ∞)^2 = -∞ while (0 + i ∞)^2 = 0 - ∞ + 2 i 0 ∞ (this expansion of the squared parenthesis doesn't assume anything IMO). For making both sides equal, 0 × ∞ must be zero. OTOH, W...
by J-F Garnier
Sun Mar 18, 2018 2:58 pm
Forum: Bug reports
Topic: [DM15L M1B V25] DIM error when > 99
Replies: 9
Views: 1879

Re: [DM15L M1B V25] DIM error when > 99

Even with an empty calculator (0 program steps) it won't allow to set more than 99 registers. In the same way, you can't create a matrix with more than 99 elements in a row or column. For instance, to create a 200-element matrix, you can't do 1 ENTER 200 DIM A, but you can do 10 ENTER 20 DIM A. I t...
by J-F Garnier
Sun Mar 18, 2018 2:48 pm
Forum: Bug reports
Topic: DM15 old and new bugs
Replies: 5
Views: 1257

Re: DM15 old and new bugs

What is the default memory allocation in V25? V16 is MEM: 30 99 0-0 If V25 is different, can you check again with this memory allocation. The affected registers are depending on it. It is also 30 99 0-0 but I was wrong. Corruption did occur with V25. Thanks for confirming. I was asking about the me...
by J-F Garnier
Sat Mar 17, 2018 4:23 pm
Forum: Bug reports
Topic: DM15 old and new bugs
Replies: 5
Views: 1257

Re: DM15 old and new bugs

grsbanks wrote:
Fri Mar 16, 2018 9:34 am
The corruption of matrix data does not happen with M80 version 25. I just checked.
What is the default memory allocation in V25? V16 is MEM: 30 99 0-0
If V25 is different, can you check again with this memory allocation. The affected registers are depending on it.

J-F
by J-F Garnier
Wed Mar 14, 2018 7:38 pm
Forum: Bug reports
Topic: DM15 old and new bugs
Replies: 5
Views: 1257

DM15 old and new bugs

I recently went back to some personal studies on the hp15c system, and pulled out my old 2012 "DM15CC" to test a few ideas. I updated it with the latest firmware (V16) available for this first generation machine (that was still in V8 up to now) and I was suprised to discover again an old bug related...