Boat-bit: Difference between revisions
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The mechanisms involved in reading and writing a boat-bit are shown in the image in the infobox. The bit as shown in is the 0 state, with no boat present. It is about to be set to 1 by the incoming green glider, and then switched back to 0 again by the red glider. The first crossing glider will survive, but the second will be destroyed. | The mechanisms involved in reading and writing a boat-bit are shown in the image in the infobox. The bit as shown in is the 0 state, with no boat present. It is about to be set to 1 by the incoming green glider, and then switched back to 0 again by the red glider. The first crossing glider will survive, but the second will be destroyed. | ||
[[David Bell]] found a method of reading the bit while setting it to 0 in January [[:Category:Patterns found in 1997|1997]]. It works by firing a [[middleweight spaceship]] at the boat-bit. If it is already 0 then the middleweight spaceship passes unharmed, but if it is 1 then the boat and the middleweight spaceship are destroyed and, with the help of an [[eater 1]], converted into a glider that travels back along exactly the same path that is used by the gliders that toggle the boat-bit | [[David Bell]] found a method of reading the bit while setting it to 0 in January [[:Category:Patterns found in 1997|1997]]. It works by firing a [[middleweight spaceship]] at the boat-bit. If it is already 0 then the middleweight spaceship passes unharmed, but if it is 1 then the boat and the middleweight spaceship are destroyed and, with the help of an [[eater 1]], converted into a glider that travels back along exactly the same path that is used by the gliders that toggle the boat-bit: | ||
{{EmbedViewer | |||
|pname = boatbitmwss | |||
|position = center | |||
|viewerconfig = #C [[ AUTOSTART THUMBSIZE 2 WIDTH 480 HEIGHT 360 Y 7 ZOOM 16 GPS 40 LOOP 120 ]] | |||
}} | |||
Other patterns that can be used to perform the boat-bit reaction include [[beacon]] (in its dense phase), [[table]] (if stabilised) and [[eater 1]]. | Other patterns that can be used to perform the boat-bit reaction include [[beacon]] (in its dense phase), [[table]] (if stabilised) and [[eater 1]]. | ||
Revision as of 06:37, 17 November 2018
| Boat-bit | |||||
| View static image | |||||
| Pattern type | Memory cell | ||||
|---|---|---|---|---|---|
| Number of cells | 11 | ||||
| Static symmetry | Unspecified | ||||
| Discovered by | Unknown | ||||
| Year of discovery | Unknown | ||||
| |||||
A boat-bit is a binary digit represented by the presence or absence of a boat next to a snake (or other suitable object, such as an aircraft carrier). The bit can be toggled by a glider travelling along a certain path. Such an object is sometimes called a snake-bit, although that name is less sensible because the snake can easily be replaced by other objects.[1] A correctly timed glider on a crossing path can detect whether the transition was from 1 to 0 (in which case the crossing glider is deleted) or from 0 to 1 (in which case it passes unharmed). Three gliders therefore suffice for a non-destructive read.
The mechanisms involved in reading and writing a boat-bit are shown in the image in the infobox. The bit as shown in is the 0 state, with no boat present. It is about to be set to 1 by the incoming green glider, and then switched back to 0 again by the red glider. The first crossing glider will survive, but the second will be destroyed.
David Bell found a method of reading the bit while setting it to 0 in January 1997. It works by firing a middleweight spaceship at the boat-bit. If it is already 0 then the middleweight spaceship passes unharmed, but if it is 1 then the boat and the middleweight spaceship are destroyed and, with the help of an eater 1, converted into a glider that travels back along exactly the same path that is used by the gliders that toggle the boat-bit:
| (click above to open LifeViewer) RLE: here Plaintext: here |
Other patterns that can be used to perform the boat-bit reaction include beacon (in its dense phase), table (if stabilised) and eater 1.
References
- ↑ "Snake-bit". The Life Lexicon. Stephen Silver. Retrieved on June 3, 2009.
External links
- Boat-bit at the Life Lexicon