Search found 5495 matches

by dvgrn
Today, 8:56 am
Forum: Patterns
Topic: A stable asychronous synchronizer circuit
Replies: 8
Views: 3843

Re: A stable asychronous synchronizer circuit

Entity Valkyrie 2 wrote:
Today, 12:55 am
Is there any reason why this snark variant is used?
Probably not, though chris_c built the pattern so maybe there's a reason that I don't know. On big patterns I used to arbitrarily keep some of both Snark types, so that I could copy/paste whichever variant fit best into tight spaces.
by dvgrn
Yesterday, 7:14 pm
Forum: Patterns
Topic: Potentially new oscillators
Replies: 2
Views: 80

Re: Potentially new oscillators

I find it hard to believe that no one has found these ones yet, but I scoured the wiki and could find no reference to them; Not that they would be useful for anything [P3] 35 cells... [P2] billiard table 40 cells... Welcome to the conwaylife.com forums! Unfortunately there are so many 35- and 40-ce...
by dvgrn
Yesterday, 11:44 am
Forum: Patterns
Topic: A stable asychronous synchronizer circuit
Replies: 8
Views: 3843

Re: A stable asychronous synchronizer circuit

Here is a new version of my synchonizer circuit. A smaller version that uses different edge-shooters and a smaller H-to-2G... (Two years later) There's a nice feature of this AND circuit that I didn't notice before, related to situations where you're sure that one signal will come in (but you don't...
by dvgrn
November 13th, 2019, 7:05 pm
Forum: Bugs & Errors
Topic: lifeviewer.lua not working
Replies: 1
Views: 54

Re: lifeviewer.lua not working

When I try to run "lifeviewer.lua", this error pops up: ...YouWillNeverKnow\AppData\Local\Temp\gol99F0.tmp\lifeviewer.lua:1780: overlay error: given file does not exist How is lifeviewer.lua getting into a temporary folder, exactly? I can get an error similar to this to appear if I copy the text of...
by dvgrn
November 11th, 2019, 12:36 pm
Forum: General Discussion
Topic: Golly 3.3
Replies: 16
Views: 808

Re: Golly 3.3

Redstoneboi wrote:
November 11th, 2019, 9:29 am
... typo in the comments of Flow6/Demo/unarySub.mc ...
Have checked in the change. Thanks for reporting!
by dvgrn
November 11th, 2019, 12:15 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

1. We have the two parts - the APGsembly code generated by the script and the static tape interpreter of GPC. But they're located in different places each. I would suggest to assume the user has in directory golly/scipts/calculator all the components from github and a script that reads apgsembly.tx...
by dvgrn
November 10th, 2019, 11:34 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

Fairly soon it should be possible to compile arbitrary programs and hook up the resulting computer to a "general purpose" calculator... Here's what a slightly updated version of the General Purpose Calculator (GPC) looks like, with the phi calculation program compiled for it instead of the pi progr...
by dvgrn
November 9th, 2019, 9:16 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

EDIT Lets hope the compiler will work, I'm preparing a set of library functions... It's looking very promising so far. Here's what the compiler produces starting from the reconstructed pi-calculator APGsembly code: recompiled-pi-calculator.mc.gz So far I've only run this far enough to get "3.14" ou...
by dvgrn
November 9th, 2019, 2:07 pm
Forum: Website Discussion
Topic: Pattern viewer for forum threads
Replies: 1294
Views: 303932

Re: Pattern viewer for forum threads

Question: are there any problems with removing the LOOP parameter from wiki articles about oscillators? Asking this due to the recent changes by Gustone . The only thing I can think of is that if you go to a pop-up version of LifeViewer, the displayed T values eventually get uselessly large and sta...
by dvgrn
November 9th, 2019, 1:53 pm
Forum: General Discussion
Topic: Thread for basic questions
Replies: 1682
Views: 441994

Re: Thread for basic questions

In fact, it appears that every term in the Lexicon (even the most obscure ones like LWTDS ) has been added to LifeWiki. I'm not sure I personally agree with these decisions, but that's what been decided. The LWTDS entry is a fairly unusual case -- deleted at one point because it's a term that no lo...
by dvgrn
November 9th, 2019, 1:40 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

the estimated run time for one replication cycle is going to come out to several orders of magnitude larger than the replication time for a 0E0P metacell. Yes there would be more cycles - but because almost everything is static golly might run it much faster. Well, I guess there's only one way to f...
by dvgrn
November 9th, 2019, 10:19 am
Forum: Patterns
Topic: Spaceship Eaters
Replies: 57
Views: 10966

Re: Spaceship Eaters

Hi ... Bye Arrgh. For anyone who might be searching for this pattern a few months from now -- the pattern that Gustone posted but completely failed to label is a large stamp collection of c/4 diagonal spaceship eaters using eater1 and block catalysts. Green eater1s mark locations where a glider can...
by dvgrn
November 9th, 2019, 10:04 am
Forum: Patterns
Topic: 19-bit still life syntheses
Replies: 48
Views: 1889

Re: 19-bit still life syntheses

chris_c wrote:
November 9th, 2019, 9:44 am
From my soon to be published spark searching script...
Wow! Nice find -- and a new spark searching script is quite a bombshell to drop here. Am I guessing right that you're using a hash function other than population to recognize sparks?
by dvgrn
November 9th, 2019, 9:57 am
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

@dvgrn May I ask for at least T binary unit to have a slow salvo friendly version? I've thought of self replicating design . And although the other components are imaginary for now (maybe can be added to the challenge) but the design is based on T0 so if you already redesign all the components... I...
by dvgrn
November 8th, 2019, 11:19 pm
Forum: Patterns
Topic: Tractor beam oscillator and pseudorandom number generators
Replies: 11
Views: 465

Re: Tractor beam oscillator and pseudorandom number generators

P47 PRNG... EDIT: I ran the oscillator-checking script below for 47000 generations, and it didn't return... That script gives a period of 22560 for your pattern, once you make it into an oscillator by adding a couple of eaters. A derivative of oscar.lua isn't going to be able to find oscillation wh...
by dvgrn
November 8th, 2019, 9:00 pm
Forum: Patterns
Topic: Programmable computer
Replies: 35
Views: 26331

Re: Programmable computer

Entity Valkyrie 2 wrote:
November 8th, 2019, 8:22 pm
XOR gate...
That one has been around for a decade or so -- back when forum message numbers were in the low triple digits. See also here for simeks' links to alternate XOR mechanisms (including this one).
by dvgrn
November 8th, 2019, 8:43 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Re: Smaller Pi Calculator Challenge

The circuits encoding the jump to the next state just have to be simple 90-degree reflectors, with a transparent output lane (because multiple states sometimes jump to the same nextstate). The pi and phi calculators used Silver reflectors again, of course. I think a reasonable choice for those refle...
by dvgrn
November 8th, 2019, 2:14 pm
Forum: Patterns
Topic: Smaller Pi Calculator Challenge
Replies: 13
Views: 369

Smaller Pi Calculator Challenge

This is related to the calculator reverse engineering thread , but has to do with the separate project of (re)writing a compiler for arbitrary APGsembly code. Now, big strings of Silver reflectors and complicated 223x106 G-to-MWSS converters and so on were what was was available in 2010, when the pi...
by dvgrn
November 8th, 2019, 11:15 am
Forum: Other Cellular Automata
Topic: Rule request thread
Replies: 510
Views: 176027

Re: Rule request thread

I'd like a rule with two non interacting universes-- a Wireworld one and a life one... By "non-interacting" do you mean that they're in parallel universes, so to speak -- a Life glider could pass through a WireWorld wire without affecting it, for example? Or is it just that there's a single additio...
by dvgrn
November 8th, 2019, 10:08 am
Forum: Patterns
Topic: Reverse engineering the phi and pi calculators
Replies: 32
Views: 749

Re: Reverse engineering the phi and pi calculators

If anyone would be interested in helping out with this pi-calculator emulator project, one thing that I haven't tackled yet is a detailed comparison between pi calculator APGsembly code and the commented-and-labeled phi calculator code. There are clearly some subroutines in the pi code that do thing...
by dvgrn
November 7th, 2019, 9:23 pm
Forum: Patterns
Topic: Reverse engineering the phi and pi calculators
Replies: 32
Views: 749

Re: Reverse engineering the phi and pi calculators

Ha -- finally found and swatted the last silly bug in the emulator. I had managed to put labels on the B0 and B1 inputs in the ADD and SUB modules backwards. I've fixed the labels in the pattern in the first post now. Here's a version of the emulator that doesn't bother running the real phi calculat...
by dvgrn
November 7th, 2019, 6:51 pm
Forum: Patterns
Topic: Reverse engineering the phi and pi calculators
Replies: 32
Views: 749

Re: Reverse engineering the phi and pi calculators

I see a lot of logic going on inside the calculator. But I have no clue how to use them to actually program stuff. There is some level of knowledge between the hardware and software which I completely lack. A good start would be a set of simple algorithms explained and coded into the calculator: 1....
by dvgrn
November 7th, 2019, 3:13 pm
Forum: Patterns
Topic: Reverse engineering the phi and pi calculators
Replies: 32
Views: 749

Re: Reverse engineering the phi and pi calculators

I've written a simple debugger for pi calculator. It adds listeners to some areas and every 2^20 records lifehistory status. Over the last few days I've added some very similar functionality to the emulator script. It runs much slower now, because it has to wait around for the actual pi-calculator ...
by dvgrn
November 7th, 2019, 1:54 pm
Forum: Patterns
Topic: The Hunting of the Elementary Conduits
Replies: 196
Views: 211704

Re: The Hunting of the Elementary Conduits

p2 "blinker toggle" also blinker keeper... 3h-to-g... These both appear to be "theoretical" elementary conduits, not the kind of thing that would actually go in the Elementary Conduits Collection. It seems like they'll only work if a Herschel or B-heptomino magically appears in the Life universe in...
by dvgrn
November 6th, 2019, 4:36 pm
Forum: Patterns
Topic: Oscillator Discussion Thread
Replies: 1044
Views: 521553

Re: Oscillator Discussion Thread

Excuse me, any replies to my period 2^127 - 1 oscillator? I take it you picked a Mersenne prime on purpose? Why did you choose that one specifically? There was some other activity with large prime oscillator s back in July. Is there anything about the speed-up-by-one reaction you used, that might b...