Advanced Redstone Computer Tutorial 8: Starting the ALU

This video discusses design of an ALU and begins construction of one possible implementation.

[Oshyrath]

For those who don't understand what he's doing, he is creating a bit adder. A bit adder takes in three inputs: The bit from the first number, the bit from the second number, and the bit from the carry output from the lower addition. Because a bit adder generates up to 3, there needs to be two outputs: The sum output which is the actual value you're needing, and the carry output, which goes into the next diget calculation. To calculate the sum, you must implement this equation: Sum = Bit1 XNOR (Bit2 XNOR Carry). For the Carry bit, you must implement this: NextCarry = (Carry AND Bit1) OR (Carry AND Bit2) OR (Bit1 AND Bit2).

[joker]

This binary adder design is great, props to those who came up with the design and concept. Also it makes for a really quick and easy to setup BCD :)

[Goofysoccer]

You guys, AT THE VERY BEGINNING of the ALU he said you need a BASIC knowledge of Logic Gates. You people that are complaining about how hard the video is to follow simply don't understand redstone enough to be watching this series. Go learn before criticizing. Great ALU design Benny.

[bennyscube]

Absolutely, the idea is in the concept, not the specific design.

[FFDPforever]

its sad that the amount of views for each video in this series is decreasing...i on the other hand am eager for you to make more tutorials and finish this series. nice job and keep it up!

[WildEngineering]

they are what holds the information, in binary a four bit number can go up to the number 15 because, 8 + 4 +2 + 1= 15. the first bit =1 the second=2 the third=4 the fourth =8 and so on. you can expand this to as many bits as you want, the 8th bit is the number 128. hope this helped! i have some tutorials on my channel being uploaded soon that go a littlebit more in depth. But i think benny covered most things on his channel. :)

[OmegaCraftable]

Your commentary is actually really entertaining!

[bennyscube]

Actually, 42 is the answer to the ultimate question of life, the universe, and everything, not simply the ultimate question. Be careful with your ultimate questions, they can be quite tricky ;)

[crazybuilder]

Benny u make great tutorials I think you and sethbling r the best every thing I make is your your a bit better because u make tutorials and sethbling reviews his creations but u do both ur awesome

[bennyscube]

BUDs do still work, and you can make the other ALU work with minimal changes. However, if I use the other one I won't be able to show off certain optimizations later on, so that's why I'm using this.

[Diversensato]

19:10 Benny.exe has stopped functioning, please wait until he's rebooted

[technichy]

It's a wonderful plugin called world edit. It's included in the Single Player Commands mod if you want to use it in SP

[bennyscube]

It's roughly the same overall. They do allow some new interesting things, but it's not a dramatic change for binary computing.

[gilbertoirizarry]

Love the adder, you are awesome benny.

[bennyscube]

I thought I said I would explain this style of addition in a separate video? If not, I apologize for the confusion and that is indeed my plan. Even still, it's just an adder at the end of the day, and I'm somewhat expecting people watching this to understand how an adder works.

Could you point out where I talked about how awesome I am? I don't remember saying that, but if I did then apologies again. I'm most certainly not awesome, and I didn't mean to suggest otherwise.

[iFumbug]

I hope he shows a new XOR that works in 1.5 in the next vid

[jonathan_cline]

Benny, dude you need to slow down. I love this series and was completely understanding up to this episode. You need to make a tutorial on each of the things you build in this series. So have a 5 1/2 and that's were you teach us how to build it.

[bennyscube]

That, and there's a 200 block deep pit of redstone running below me :P

Also, youtube displays videos at 30fps, so it won't be an issue in the final product anyways.

[WildEngineering]

because that what he wanted to make. they can go on for as long as you want, but it is just easier to do bits like 1, 2, 4, 8, 16, 32, 64.... Most adders in binary are either 4, 8 or 16 bit because of the size they are and the lag it creates.

[GameNationRDF]

Hey benny! Wryt from RDF. I know you and cutlass worked on a IS. I have made my own. Maybe you could cehck it out sometime. The video is "Instruction Set Design". It is a 16 bit one, and i think ut goes pretty efficient bit-wise. And i have modified your adder and now it is budless and works on my test computer! :) YAY Thanks for these great awesome super videos. Keep'em up :D