Kypetzl

Willy

@Kypetzl

  • he/him

one more cute disaster… it’s hard here in paradise

last.fm listening

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kokoscript
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modulusshift
@modulusshift

The sum of a run of odd numbers starting from 1 is a perfect square, and you can use this to get the sequence of all perfect squares. ex. 1 = 12, 1 + 3 = 4 = 22, 1 + 3 + 5 = 9 = 32, and so on.

This is a computer fact because it was used in the original Macintosh, which ran on a Motorola 68000 processor that had terrible integer multiplication speed. This fact is why circles and curves were possible on the Macintosh in reasonable drawing time. Source: folklore.org, which has tons of stories from the original Macintosh team.

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in reply to @kokoscript's post:

-pegasus
@-pegasus

Atari Mega STE and TT keyboards use mitsumi KPQ keyswitches that use rubber tubes instead of springs or domes. when you press the key hard enough, the tube collapses under the force, giving a tactile feel.

Most Amigas are fitted with mitsumi KPR switches, which is exactly the same except instead of a rubber tube there's a coil spring, giving a linear action

both types can be fitted to the same keyboard for an extremely unnerving typing experience

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cr1901
@cr1901

The SNES was probably supposed to be backwards compatible with the NES, and the functionality was ripped out early-to-mid development of the console:

  1. The SNES CPU is binary-compatible with the NES CPU.
  2. There is no overlap between the I/O addresses used between the SNES and NES...
  3. Except for the controller port, whose bits have the same interpretation on the SNES and NES.
  4. The serial controller protocol of the SNES is backward-compatible with the NES.

(I am not the first to notice this, credit to Myria, who isn't on Cohost?)

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