I didn't know about App Scripts. This is very cool not just because it is a relatively clean visualization of a CPU but also because (on a personal level) it showed me what App Scripts can do.
Now if only it displayed the register values in hex or binary. As an education aid in college I found it easier to visualize what was actually happening in one of those bases. Another useful feature for debuggers is to highlight the values that changed in the last step. Sometimes even highlighting the exact bit if displaying in binary. I'm not sure how doable that is in Google Sheets though.
Edit: it's also a nice attention to detail that the stack shares the same heap as instructions. It might have been an easy out to put the stack in it's own column.
Now if only it displayed the register values in hex or binary. As an education aid in college I found it easier to visualize what was actually happening in one of those bases. Another useful feature for debuggers is to highlight the values that changed in the last step. Sometimes even highlighting the exact bit if displaying in binary. I'm not sure how doable that is in Google Sheets though.
Edit: it's also a nice attention to detail that the stack shares the same heap as instructions. It might have been an easy out to put the stack in it's own column.