...Remember that commands are three digit numbers with the first number being the instruction and the next two digits being the memory address box.
LMCv1_by_alexiskappa has the general instructions displayed.
Just write your commands/data inside the boxes 00-99 [MEMORY] and then click on the "RUN" button.
"RESET" clears the contents of the boxes.
LMCv2_by_alexiskappa has a simple animation, showing the order of each step.
Just click the button "Animation OFF" to enable it, before clicking the "RUN" button.
Easter Egg: Try adding in box 00 the number 601 and in box 01 the number 600. ...