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Comment on TKey: A reasonably secure RISC-V computer in a USB stick

dragontamer@lemmy.world ⁨9⁩ ⁨months⁩ ago

This thing is like 5x more MHz with 8x more RAM than an Arduino. 18MHz and 128kB is plenty.

Remember: the Apollo flight computer (Moon landing) was accomplished with 2MHz and 4096 bytes of RAM. Even the Arduino is more computationally powerful than the Moon Lander.

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Plopp@lemmy.world ⁨9⁩ ⁨months⁩ ago
So, what? I’m gonna go to Mars with my USB stick RISC-V?

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- dragontamer@lemmy.world ⁨9⁩ ⁨months⁩ ago
  Any computer application you can think of from the 1970s or earlier can be replicated by a device of approximately the specs listed in this topic.
  
  IE: Airplanes, Space Exploration, Differential Equations, Matrix Multiplications, Simulations, Cruise Missiles, Homing Missiles, Firing Computers (aka: aim-bots), RADAR, SONAR, Radio communications.
  
  To just give you an incomplete idea of what’s possible. So erm… anything you want, really.
  
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  - Plopp@lemmy.world ⁨9⁩ ⁨months⁩ ago
    Oh, well in that case I’m making a USB connected sonar guided homing missile with an airbag!
    
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vrighter@discuss.tchncs.de ⁨9⁩ ⁨months⁩ ago
arduinos run at 16 MHz

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- dragontamer@lemmy.world ⁨9⁩ ⁨months⁩ ago
  I stand corrected.
  
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  - vrighter@discuss.tchncs.de ⁨9⁩ ⁨months⁩ ago
    they actually could be made to run at 20 MHz with some software tweaks. But sram is still much less
    
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    dragontamer@lemmy.world ⁨9⁩ ⁨months⁩ ago
    That’s what confused me.
    
    Modern versions of ATMega (ex: the AVR DD) run at 4MHz by default, even if they can go up to 24MHz. Looking back at ATMega328p (which powered the Arduino Uno, aka the one that got popular), the ATMega328p defaults to 1MHz.
    
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