AS & A Level Computer Science (9618) - Chapter 6: Introduction to Assembly Language Programming

[@jamesganleongyi]

Hey everyone, you can purchase the slides that I use here 🏬😉: Link: www.jamesgan.net/alevelcs Thank you for watching and supporting!

[@LomakPotato]

James thank you, I will have my exams tmrw and you helped me so much

[@meesammatics]

please make a video of topical past papers too. btw love your lectures :)

[@stevensoft4407]

God bless. my teacher didnt even know it🤦‍♂

[@benjamwd8254]

Wait, do you make these powerpoints? Because they are amazing!

[@bilaltaj1725]

32:00 you did STO 201, so you just copied the value of ACC to address 201 and ACC remains unchanged?

[@bilaltaj1725]

When we havent loaded anything in the accumulator and just started our program do we assume that the accumulator has "0" in it?

[@johnyangsana911]

24:11 ADD 200, where location on 200 contain Address . And Address contain 200. ACC should 400 + 200 = 600. Not 400 + 18.

[@jamesganleongyi]

Hey, ADD 200 here functions as a "direct" adding, therefore we take the value 18 as "data", and not address ya!

[@johnyangsana911]

Contain of Address 200 is Address 18 and refer to 200 data?

[@bilaltaj1725]

When the instruction says load something to the accumulator for e.g LDD #21 , what happens to the value already stored in the accumulator? does it get replaced or added?

[@uzairilyassandhu4111]

it is overwritten i guess

[@eyobaasfaw9232]

@@uzairilyassandhu4111 yes it is overwritten and the new loaded value will replace the old value in the accumulator. If addition was desired, the op code (ADD #21) would be used!

[@zephyrquasar]

watching this 30 mins before the exam 💀