Ben Eater's Homebuilt Computer

[Bob Kuczewski]

CPU Control Logic

In this video Ben asks the question as to whether what he's built is really a computer. Ben discusses the work of Alan Turing and Alonzo Church regarding computability and discovers that he needs to add one instruction - a conditional branch - to make his computer "Turing Complete" within the confines of a finite memory.

https://www.youtube.com/watch?v=AqNDk_UJW4k

[Bob Kuczewski]

CPU Control Logic

In this video, Ben builds the hardware needed to add two conditional instructions ("Jump on Zero" and "Jump on Carry"). When fully implemented, these should make this computer "Turing Complete" ... at least within the constraints of its finite memory.

https://www.youtube.com/watch?v=ObnosznZvHY


By the way, if you are interested in the phrase "Turing Complete", there is a lot of information on the web including this very cute implementation of a Turing Machine:

      http://turingmachine.io/

[Bob Kuczewski]

CPU Control Logic

In this final video of the series, Ben shows how to change the microcode to add 2 new instructions ("Jump on Zero" and "Jump on Carry"). Ben uses these new instructions to write a program that can multiply 2 numbers and produce a result.

https://www.youtube.com/watch?v=Zg1NdPKoosU

[Bob Kuczewski]

Ben also made a series of videos using the 6502 microprocessor:

https://www.youtube.com/watch?v=LnzuMJLZRdU




https://www.youtube.com/watch?v=yl8vPW5hydQ



https://www.youtube.com/watch?v=oO8_2JJV0B4

https://www.youtube.com/watch?v=FY3zTUaykVo

https://www.youtube.com/watch?v=xBjQVxVxOxc

https://www.youtube.com/watch?v=i_wrxBdXTgM

https://www.youtube.com/watch?v=omI0MrTWiMU

https://www.youtube.com/watch?v=fCbAafKLqC8

https://www.youtube.com/watch?v=ZYJIakkcLYw

https://www.youtube.com/watch?v=v3-a-zqKfgA

https://www.youtube.com/watch?v=DlEa8kd7n3Q

https://www.youtube.com/watch?v=oOYA-jsWTmc