The Powder Toy

4 Bit electronics calculator by INFINITY-BOI

INFINITY-BOI
INFINITY-BOI
21 / 1
6th Apr 2020
3rd Nov 2020
A small calculator what uses my own Adder-Subtractor 4 bit ALU! Instructions in save .

Comments

  • INFINITY-BOI
    INFINITY-BOI     15th Nov 2020
    nope .
  • wsxdrfvyhn
    wsxdrfvyhn     12th Nov 2020
    it seems like he finally truly quit
  • INFINITY-BOI
    INFINITY-BOI     26th May 2020
    wtf lol ? im cant understand lmao
  • blane1257
    blane1257     25th May 2020
    i believe 1's compliment is just logical negation, and as far as i'm aware, it doesnt work. i dont know of any case where 2's compliment isnt used for arithmetic negation, and you are correct that little extra circuitry is required, you just need to invert one of the inputs and set the carry bit high
  • INFINITY-BOI
    INFINITY-BOI     21st May 2020
    working on display :D
  • INFINITY-BOI
    INFINITY-BOI     21st May 2020
    idk what is compliment haha
  • smaw
    smaw     19th May 2020
    @INFINITY-BOI If you use 2's compliment you can display negative numbers as well as process them, which is an advantage I guess. Also, in the full adder the carry in is already there so you don't really need to do much extra wiring to use 2's compliment in an ALU. I don't know how 1's compliment works though so I can't say which is better
  • INFINITY-BOI
    INFINITY-BOI     6th May 2020
    @Blane , actually it works normally lol
  • blane1257
    blane1257     5th May 2020
    this appears to use one's compliment for negation, which doesnt work with arithmetic.. you should use two's compliment, my ALU allows for two's compliment negation, its what im pretty sure everyone uses. its a bit more complicated than one's compliment negation because instead of just negating all the bits, you actually negate them then add 1. you can do that pretty easily though by just enabling the carry bit input
  • INFINITY-BOI
    INFINITY-BOI     17th Apr 2020
    work lol*