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MorlockP's profile
ⓘ Dogs don't have thumbs
ⓘ Dogs don't have thumbs
ⓘ Dogs don't have thumbs
@MorlockP

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ⓘ Dogs don't have thumbs

@MorlockP

Two-time Prometheus award-winning hard science fiction author. https://www.amazon.com/dp/B005JPPMS6  Learn how to homestead https://www.amazon.com/dp/B093BC3K1T 

Aristillus Crater, Luna
amazon.com/dp/B005JPPMS6
Joined June 2012

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    1. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      9/ Each line in the above image represents one action that can be done in the VM. There are 16 or so actions this micro / baby / software defined computer can do. Everything else is built atop those.

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    2. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      10/ The first two lines say "there is an operation which, given some piece of data, will tell you if that piece of data is a number, or a datastructure". The next two lines say "there is an operation that adds 1 to an integer, but does not modify a datastructure".

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    3. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      11/ The next three lines say "there is a function which tests if two things are identical to each other". Etc.

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    4. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      12/ The VM operations get weirder as you descend the list. In the middle we get data access...and this is where it is revealed that the VM does not use linear memory like every other bit of computation ever in the history of the world. See, in computers, memory works like >

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    5. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      13/ a long row of mailboxes. The first mailbox is number 0, the next one is 1, next is 2, next is 3... etc. And computers operate, at a base level, by taking the data in mailbox 13, adding it to the data in mailbox 98, and storing the result in #9971. or ...

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    6. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      14/ looking at the number stored in location 931, and if it's 0 next moving on to mailbox 932 and performing whatever operation is stored there, but if that first number ISN'T zero, then instead going somewhere else and etching an instruction from that location.

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    7. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      15/ but, key thing here, is the memory is linear. Addresses get bigger and bigger. In the urbit VM, memory is a tree structure. The first memory location has two children. Each of those children has two children. Etc. So to get to a certain memory location you can't just >>

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    8. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      16/ start at location 0, check your notes, see "ahh, we're going to location 9 million and 6 ...let's speed walk along this row of mailboxes till we get there". Instead you start at location 0 and then take a forking path: left, left, left, right, left, right, right right...

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    9. ⓘ Dogs don't have thumbs‏ @MorlockP Mar 11

      17/ The language, the 16 opcodes, that run on this virtual machine, are called Nock. Nock is insanely difficult to program in, so Curtis wrote a higher level language ON TOP of Nock, called Hoon ... which is ALSO insanely difficult to program in.

      3 replies 1 retweet 39 likes
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    10. Sarah Constantin‏ @s_r_constantin Mar 14
      Replying to @MorlockP

      wow, thank you! this is the best explanation I've yet seen of what's going on with Nock & Hoon.

      1 reply 0 retweets 2 likes
      ⓘ Dogs don't have thumbs‏ @MorlockP Mar 14
      Replying to @s_r_constantin

      🤗

      5:54 AM - 14 Mar 2022
      0 replies 0 retweets 0 likes

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