Maps Redstone Device

8 bit comparator

Updated on Jul 23rd, 2012, 7/23/12 2:13 pm | 1 logs
Published Feb 1st, 2012, 2/1/12 7:29 pm
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zaubara
Level 36 : Artisan Ninja
38
This device compares two binary 8 bit numbers and sets the outputs for A>B, A=B and A

Additional Notes

Blue: Inputs (light blue indicates LSB)
Red: A = B
Purple: A < B
Orange; A > B
Progress100% complete
Tags

1 Update Logs

Update #1 : by zaubara 07/23/2012 2:13:28 pmJuly 23, 2012 @ 6:13 pm UTC

Fixed the schematic, it was missing some redstone on the top.

  Have something to say?

Phrozenbit
• 04/18/2012 9:10 pm
• Level 18 : Journeyman Miner
May I use this in the ALU of my first CPU ? I'll make sure to properly give credits. I'm trying to build something that is capable of computing the 'shift-add 3 algorithm', it changes real binary to binary coded decimal, i'm sure you probably know that. Looks good, already a fan of your work :-)
1
zaubara
• 04/19/2012 4:40 am
• Level 36 : Artisan Ninja
Sure, I would like to see it in other buildings :)
1
Phrozenbit
• 07/20/2012 12:50 pm
• Level 18 : Journeyman Miner
Thanks :-)

Really a nice device, I'm using it for conditional branching on my CPU.
I had to fix it on 1.2.5 though, missed some redstone wire on the top, but it works like it's supposed to now.

Neat :-)
1
zaubara
• 07/20/2012 1:59 pm
• Level 36 : Artisan Ninja
Thanks too :)

I'll update the schematics!
1
CreeperofJustiss
• 02/03/2012 2:18 am
• Level 15 : Journeyman Miner
so in simple worlds its a lock
1
zaubara
• 02/03/2012 6:11 am
• Level 36 : Artisan Ninja
its a logic circuit that implements the mathematical operations =, < and > (by combining them you can also make <= and >=).
The numbers that are compared are binary encoded (base-2, the number system computers work with, were you only have two states to represent a digit. The number system we normally use is base-10, the digits from 0-9).

You're right, you may use this circuit to make a simple (in meaning of not-so-safe) code lock, but its mainly used in electronic circuits that compute something, like a CPU.
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CreeperofJustiss
• 02/02/2012 4:03 am
• Level 15 : Journeyman Miner
wat dose it do
1
RevolutionalRedStone
• 02/02/2012 6:21 am
• Level 54 : Grandmaster Pirate
Imagine that all the combinations of either on or off of some amount of redstone lines were assigned numbers.

Now image you have two sets of these lines.. each representing there own number.

..Well this device.. tells you which of the two sets of lines represent the largest number. OR, whether there the same.
1
rollrat
• 02/01/2012 10:19 pm
• Level 5 : Apprentice Crafter
Oh, This circuit is very small. How make this circuit to more small?

Good circuit.
1
zaubara
• 02/02/2012 6:59 am
• Level 36 : Artisan Ninja
Thanks, i've already tried to make it as small as possible :)
1
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