When you Transfer Accumulator to X (TAX), is the value that you transferred to X still in the accumulator? And if not, what is in it?
Also, when you Push the Accumulator to Stack (PHA), same question. When you put the value on the stack, what is then in the Accumulator?
I'm not sure if when you Transfer or Push or Pull, if it's simply copying the value to that destination, or transferring it, making the accumulator a previous value or something else.
And when you Push or Pull to/from the Stack, does it start at the end of the stack ($1FF), or at the beginning? Because I noticed that when I use the earlier stack addresses ($100 - $10F for instance), that in some of the hacks I did, those earlier stack addresses are never used.
Thank you for your time.