Two's Complement Part 2 - An Introduction

[celticmagnum]

You need to get yourself a tripod!

[gimmedaloot754]

you're awesome. I'm a returning student so i haven't seen this material in 15 or so years. You were clear concise and did i mention, awesome! thanks

[YourVertigoso]

BINARY JESUS

[Capone2901]

Wow, i really understood that! My books never gave an answer.

Good Job!!! Please go on making videos!

[nuclear181]

Thanks alot

[overscoreSX]

Thank you so much man. Very informative

[helofrind]

thanks for the video, it helped out



[garicho]

great video really helped!

[PoMPyroLoL]

Wish the glare off of the board wasn't so bad. Otherwise, excellent video

[HenryHeve]

this is extremely helpful.

[MinecraftPuzzleMaps]

If I've understood this correctly: We want to add A + B (where A and B can both be negative or positive). We get overflow if: left-most bit (MSB) of A is equal to MSB of B, and MSB of both A and B is NOT equal to MSB of the sum. Yes?

[VerySimpo]

whats -19 in seven bit two's comp?

[loumiakas]

thanks soooo much it helped me a lot :P

[ShokoDemon]

test

05:21

[nisalraji]

Thank you sooo much

[URAL290]

man keep going and make some more videos about digital design :)

[a30nC]

Please make more! Your videos explain these techniques so simply!

[stawbewii]

Thank you! Nice video! Keeping it simple with easy to understand examples

[The20khz]

Great videos. Would love to see the same for floating points & IEE Standard 754.

[7thrx]

I had an AHA! moment. Thanks so much!

[kuhkoa]

Thank you!

[sanjay19961026]

so this means this system only supports for numbers from -4 to 3?

[djentblast19]

@sanjay19961026 Only if it is a 3 bit system.

[mazdyabosoraya]

bravo

[PatziWinter]

Thank you very much - great presentation

[koruptwon]

Very helpful, thanks

[rolex408]

excellent explanation! Thanks!

[jessica507]

What a great explanation! Looking forward to more videos like this!

[WikiPeoples]

Great teacher. Sad to see only these videos on his channel :(

[DrDan021]

I wish you were a teacher at my school...your explanation was so much better than my professors

[r0by]

Absolutely, best explanation!!! I wish you were teaching my computer architecture class...

[TheJoeReisExperience]

Best explanation I've seen. Thanks.

[AntonShumin]

Amazing! I have an exam in 3 hours, and 2 complement is a possible sub question. This vid saved me 30 extra min of sleep! Tnx a lot

[waisybabu]

Great job, sir! I needed help on SM, 1C and 2C and this video absolutely cleared my concepts. Keep it up! God bless you!

[intotheoutro]

You're a very great teacher. Way better than the one I am paying for... Shutup and take my money.

[azizeqab]

Thanks alot!! Make some more videos multiplexing, modulation tecquniques, logic circuit, arinc the works. People will start putting adds on ur youtube account and website and you will make some money....

[Meedesign]

Thanks!! :)



[probscus]

this was brilliant now i have an understanding of it to apply it to an adder subtracter in minecraft

[AlexanderLee1]

Great video, helps a lot. Wish you would make more!

[Gaiacarra]

I feel your explanation lacks mathematical rigor... I'd like to know the math that makes this system work.

[stoffe1100]

I wish you were my teacher. Now i know so very much more, thanks

[dodgeshelbyviper]

Well explained Dave. Thank you very much for this. My first semester Math instructor couldn't explain this concept as well as you did.

[IMPMAC]

good stuff for exam preparation

[sagark91]

yesss. now i understand twos compliment fairly well for my computer science final tonight. thanks.

[sony827]

A level computing is hard!!!!!! .....this is college level.....

[mwtillotson]

Excellent video -- thanks so much.

[TheEazyM3]

Great video. Good pace, very instructional and easy to follow. Appreciate the video and keep it up!

[NoorPerry]

wow this was really helpful! :D

but the example of -4 -3 = -7 doesn't indicate an overflow, it indicates an underflow

[natlawns]

@NoorPerry Overflow means out of bounds error

[NoorPerry]

@natlawns

then when do we use the term "underflow" ?

[hzmtk22]

Sir, it's "complement" not "compliment"!

Anyways, Sir, you are great teacher though!!

[leahcim165]

Thank you so much!

[b0ondockz]

You are the man!

[leok31]

Amazing, 1 week of reading $120 textbook explained in 20min video!

If I can return a toaster because it doesn't make toast, why can't I return the book that says it will teach me binary but it doesn't!

[shortlthug88]

nice thanks

[d0nunit]

Thank you for introducing the overflow part

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[AbdullaShamsuddin]

Thank you that was very helpful 

[SveinbjornGeirsson]

It's all so clear now!

I can't believe I paid all that money for a silly textbook that can't even make something THIS SIMPLE comprehensible.

Thank you! :)

[kellingc]

Thank you for posting part 1 and 2. I'd forgotten how to work Twos Complement. I've started restoring a PDP8/e and the op codes are all twos complement.

[chingyan01]

fantastic stuff!! much better, clearer to teach with a 8-bit system in my lessons

[ptrakk]

thanks dude!! You are the mad note!

[THE16THPHANTOM]

you rocked 15 pages of my confusing text

[WorldHK]

Thank you very much

[theman1992]

i love you man

[hamad2k]

Thank you a lot. That's really helpful.

[MAYBACK10]

excellent work .... i wish i had professor like u .... Thanks a lot.

[ImOneCrazyFucker]

Excellent explanation.

[mwmnjs]

Great video! helped with my CS homework! Thanks!

[caroleabumoussa]

So if -1 is represented as 111 in two's complement, does it matter if you increase the number of bits to make 8 (11111111)? Or would it still be -1? If so, does increasing the number of bits in two's complement not make a difference in the value of the greatest number that could be represented?

[thon7734]

@caroleabumoussa

Keep in mind that the greatest number that can be represented would not be 1111 1111 in an 8-bit system. The largest number possible would be 0111 1111, the leading zero makes that a positive number, and you can read the rest of it like normal binary.

0111 1111 = 127

just like normal

re-watch the vid:

@1:44 he talks about the things implied in 2's complement

@2:18 the smallest # (largest absolute value, but negative #'s are small)

@2:30 he talks about the largest #

[caesiume]

I finally understand.

[dallashawks]

keep the videos coming!

[TaylorHolmes]

Thank you SO MUCH dave collins guy. You just saved me in digital logic.

Any relation to phil collins? sorry, had to ask.

[creativefla]

thank you man, this really helps me!

[marobra00]

thanks;

i did not get it at school

and the proff. made 0110100-00011001=01001101 (100-25=77) the idiot! he complemented the one hundred then added one.

[munmanito]

Thanks you ! Very good.

[hawkins81]

I can't thank you enough for this, it's really helped me with my exam preparation for tomorrow's computing exam.

Keep up the good work, your videos are by far the most easy to understand (and learn from) out of any computing videos I've seen so far!

[Fruitzii]

Thx alot , this was very informitive and easy to understand, it helped me alot, thx once again and keep up the great work !

[rachelm920]

Thank you thank you thank you!!! It was so much easier to see your two videos and understand than reading it in my chapter!!

[NEOX71]

thanks man :)

[harmtouch]

Thank you!

[ocholoco85]

what can I say thanks

[TheSkepticalAtheist]

Very cool. Again, very easy to understand with this presentation.

[somanyBEARS]

you are great. thank you dave collins

[BardicCircle]

Wow that was great. Really clear with everythng. and now i understand it

[DomFinn]

brilliant thanks. Really clear.

[skcin7]

thanks for the videos, these were very clear

[Rikv01]

Thanks man, very clear and very helpful. You should be a teacher. Ah well, maybe you are.

[vamshi92]

superb lecture

[pensego]

AWESOME MAN!! you should do the entire number theory.

[0219802198]

You have the same name as me which is weird... But this is VERY useful, thanks so much

[liamgreener]

lol, explained so much better than my college tutor. thanks

[alex871uk]

Nice vids, very sleek production! I like the ar15 under your monitor. Maybe propositional logic next? Can't wait for more!

[KosmicFlux]

I have a quick question: 111 = -1 using two's compliment, but 111 can also represent the decimal number 7. How does the system know whether it's supposed to be -1 or 7?

[protowise]

Nothing in some arbitrary binary value will tell you how to interpret the value. You must know how the value is to be interpreted (2's complement, unsigned, sign and magnitude, etc). If I have 16 arbitrary bits, they may represent ASCII text, UNICODE, a 2's complement signed integer, unsigned integer, etc. If you know the 3 bit system represents all numbers as unsigned integers, then 111 would be interpreted as 7, if 2's complement then 111 would be interpreted as -1.

[EdwinC1000]

Wow, I'm stunned. Thanks Dave. This cannot be made any clearer. Also, very kind of you. Thanks again, and again, and again.

[hyp3o]

This was super clear! I hope you make more videos in the future

[GiGaMoG]

Can you explain why exactly are they being called "one's" and "two's-complement"? Is it because of the steps it takes to define positive and negative values?

[nikisxxll]

thanks, rather i do my homework, i watch youtube videos :D that helps me with work :D

[DSKGSAKDG]

thnx for that man !! plz make more vids on number systems !!! i appreciate it !

[niroshan91]

great work . thanks...

[ThomasCountz]

These videos were very helpful, I had no idea what two's compliment was prior to viewing these and now I feel like an expert! Thanks!

[nateaus]

Nice break from my text book... Thanks.

[TheWater911]

Again, very helpful. 5