Search found 85 matches

by Krauts In Space
Thu Feb 22, 2018 8:24 am
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

Ok, here's my find. The number of valid 'random' digits depends on the number of SEEDed digits after the decimal point. With 1 digit (0.1, 0.2, 0.3 ...) the 2nd to 12th digit are the same with the first RAN. With 2 digits (0.11, 0.12, 0.13 ...) then3rd to 12th digit are the same. And so on. Getting ...
by Krauts In Space
Wed Feb 21, 2018 5:03 pm
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

I've saved machine state several times after "0 SEED"ing. Everytime the memory 0x016A to 0x0179 contains 01 A8 02 00 00 00 00 00 70 9C E9 04 00 00 00 00 I've saved and checked this 4 times These adresses seem plausible as after the first RAN they contain 53 16 7C 03 00 00 00 00 7F 3F 8D 00 00 00 00...
by Krauts In Space
Wed Feb 21, 2018 3:45 pm
Forum: DM42
Topic: Purge/Rename State
Replies: 1
Views: 1378

Purge/Rename State

In setup, I can Load and Save states und Load Clear State.
A 'Purge State' and 'Delete State' menu entry would be fine.
Right now this must be done via USB-connection on the computer.
by Krauts In Space
Wed Feb 21, 2018 2:57 pm
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

I've saved machine state several times after "0 SEED"ing. Everytime the memory 0x016A to 0x0179 contains 01 A8 02 00 00 00 00 00 70 9C E9 04 00 00 00 00 I've saved and checked this 4 times These adresses seem plausible as after the first RAN they contain 53 16 7C 03 00 00 00 00 7F 3F 8D 00 00 00 00 ...
by Krauts In Space
Tue Feb 20, 2018 2:47 pm
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

Thomas Okken wrote:
Tue Feb 20, 2018 1:43 pm
Krauts In Space wrote:
Tue Feb 20, 2018 1:06 pm
"vacation" ... "vacation" ... hmmm, maybe Webster tells me what this is ... ;)
I thought you had decent amounts of paid vacation in Germany. Or does that not apply in Bavaria? :shock:
Sure - unless you're an self-employed ... :)
by Krauts In Space
Tue Feb 20, 2018 1:06 pm
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

Look for occurrences of random_number_low and random_number_high in core_globals.cc (definition) and core_math2.cc (where they are used, in the math_random() function), or also in core_commands2.cc (where they are set, in the docmd_seed() function). To help find those variables without knowing thei...
by Krauts In Space
Tue Feb 20, 2018 12:29 pm
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

Yes, but if you've set the seed but haven't generated any random numbers from it, it should provide a clue about the internal value (15 digit number) generated from the parameter of SEED. As I understand it, that internal value isn't generated by anything resembling a secure hash function, and shou...
by Krauts In Space
Mon Feb 19, 2018 12:01 pm
Forum: Usage tips, tricks and problem reports
Topic: Serial port
Replies: 6
Views: 1413

Serial port

On the PCB are hole for a serial port (TX/RX/GND).
I'm pretty sure this is or was for development reasons and/or installing a boot loader.
Anyone tried this out, soldering pins and connecting with a PC?
by Krauts In Space
Mon Feb 19, 2018 8:34 am
Forum: Usage tips, tricks and problem reports
Topic: Random numbers
Replies: 28
Views: 4568

Re: Random numbers

Bug? It uses the same algorithm as the real HP-42S, which is the same as the RPL calculators, except for using a different starting seed after Memory Clear. I implemented this in 2.0.7 (DM42 3.1); earlier versions used the RNG from the HP-41C applications book: r[n+1] = frac(r[n]*9821+0.211327). Th...
by Krauts In Space
Fri Feb 16, 2018 9:50 am
Forum: Software Library
Topic: Character set for 400x240?
Replies: 2
Views: 1299

Character set for 400x240?

Hi, is there any character (digits) generator for graphics mode?