Re: Setting A in C-instruction

Posted by eatmorepies on
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Setting-A-in-C-instruction-tp4036936p4036944.html

What happens in the case where there is no previous instruction? In terms of an A-instruction: would we (in this order)

1. First send the A-instruction value to the a register through the first multiplexer, and set the load bit to 1
2. Calculate a value in the ALU, and send it back to the multiplexer
3. Again send the A-instruction value to the A register
4. Emit the value of the a register, and perform some calculation based on the next instruction?