8-bit CPU control logic: Part 1

[PhoenixClank]

This is the most glorious part. "LDA 14. What does this mean, where does it come from? Well, we're building the computer. We get to decide what stuff means!" For some reason that just puts a beaming smile on my face. And I'm not even building along.

[mikeb]

Thanks Ben, now I've blown $300 in breadboards & components, and lost a month of sleep. I keep waking up midnight thinking of chip enables and op codes.

100% worth it

[stevenscott]

I'm an electrical engineering student and you have cleared up, in less than 30 minutes, material that I've been searching hours on end for, regarding control logic and its implementation in an easy-to-understand manner. I cannot commend you highly enough for this incredibly lucid presentation. Please do not ever take these videos down. As someone else commented, they should be required for electrical/computer engineering students.

[carab]

I feel like this whole series should be required viewing material for all computer engineering students. It covers the whole gamut of topics from software to hardware to architecture design in a detailed but clear way. Thank you so much, Ben Eater, for all the time and work you have put into these videos.

[UpLateGeek]

LMAO
"That zero went over there, I'm not sure if you saw it."

[nicku]

This is a childhood dream come true, except someone else is doing the hard part.

[will]

Can't wait to see the 64-bit 24 core version

[jeffbarnett]

I'm an Computer Science instructor at a community college in California, I have my students build the entire SAP-1 for their Machine Language class. The students seem to really look forward to lab. This will be the 2nd semester that we've incorporated the SAP-1 into the curriculum via the Ben Eater videos. Last semester the students made it to the output register, this semester we are hoping to finish.

[EvilCoffeeInc]

The simplicity of explanation is so wonderful. Just from watching your videos, I've been able to connect the dots on how assembly works at a low level, how a cpu processes information, how bit-shifting works, etc. This is fascinating stuff.

[LoneTech]

We could run the CE (program counter increment) during cycle 2, shaving a clock cycle off the fetch stage. It doesn't require the bus, so won't collide as long as it's not a counter out cycle.

[stepsvideos]

For me this is the channel with the most anticipated uploads. Imagine if school classes had been this interesting, how much smarter we would all be. Good job Ben!

[mallesbixie]

I just discovered and watched this series. you have a great way of explaining all this complicated stuff. I can't wait for this last bit, that ties it all together.
Keep up this good stuff!!

[BhupinderSingh-qvkh]

Ben I am at loss words, but will still try.
This is by far the most "INFORMATIVE" lecture/demo/tutorial I have seen on how a computer works.

Of all the great things this video stands for, the most interesting is the INTUITION it builds.
If someone is interested they can watch the entire series, , but even if they go through just this lecture, I am sure one would get insight into a how a computer works.

I am also amazed at the efforts and the amount of hard-work that has gone to create this content.
If there is any award out there for best teacher, you out to get it.

Last but not least, I think this should be required content for every computer engineering student.
👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏

[kriss]

Stopped Netflix immediatly when the notification came. Still there was already 5 likes....ben eater is the best beast in easter....

[rulojuka]

This video is beautiful. The content, the didactics, the troubleshooting, the 42 in the end, the lack of audiovisual fillers, the simplicity, etc etc.
Thank you very much.

[Rudabaugh]

Watching this kind of stuff just puts into perspective how much we take our modern computers for granted.

[andygello]

i nearly screamed when the output didn't update. there was so much anticipation

[stumbling]

I really appreciate your methodical approach: step through it manually then think how can we get logic to automate this step, rinse and repeat. It has been a dream of mine to build an 8-bit computer and you make it seem a lot closer.

[Hahahahaaahaahaa]

The hardware debugging at the end was strangely the most interesting part of this video. Really appreciate you keeping the whole process on screen.

[piyush]

Now I'm enlightened about the control unit, wow. I can sense a little bit about how we're gonna define LDA or other commands just as we did with the display, combinational logic or rom, , or maybe some other way