Computer Architecture & Hardware Maintenance lectures playlist :
https://youtube.com/playlist?list=PLBV6VAQlom0k6FhyVNFO_QLiPgu-eWOod
Introduction to CPU -
https://youtu.be/WBiZFWA3_ew
General Register Organization -
https://youtu.be/W8HojQhCxXI
Stack Organization Part 1
https://youtu.be/m8DpJBI-6Tg