User File #75291642453080158

Isn't this 15 frames?

Are you going to submit this for publication?

This TAS seems to work on 2.6.3.

I'm trying to take a few more frames off before I submit it, though I do plan on submitting this.

I included lag frames from the moment the console turns on. From turning on the console, it's 24 frames. Only including controller latches, it's 15 frames.

Thanks for testing it there! I'm trying to make some improvements and decided to just download 2.6.3 while testing some more things.

Is it ok if I post a video of this version on YouTube?

I would prefer if you didn't. I'm in the process of making a really detailed video about how this run works. I'm also still trying to find ways to improve it, and I mostly submitted it here on TasVideos so someone on the discord could grab the file if they wish to console verify it.

Ok. So, how did you find this improvement? How would I make a similar TAS?

Reading through the notes on the current submission: http://tasvideos.org/6466S.html They mention the key goals are to execute $B85A while address $100 has a value of $20. Their method is to end up writing JSR $8FE1, which ends up satisfying all the requirements, as that chunk of code sets up address $100 and jumps to $B85A. However, there is a surprising amount of effort required to write JSR 8FE1, which is why their run takes as long as it does.

My method was to instead use address $15, which increments by 1 every frame, to write JSR xx1E, where xx is whatever buttons I'm holding on controller 1, and $1E is the value of address $16, which it should always be. I found a place I could jump to at address F81E. This place writes JSR $0020, which would let me return to the zero page, and since this JSR instruction is sitting at xx1E, it writes (1E + 2) to the stack, which is $20. If the stack pointer is in the correct place when all that goes down, that satisfies the address $100 requiring a value of $20 problem. After that point, I just need to jump to $B85A, which can be written with nothing more than button presses.

Though this method does have some drawbacks, it would take 32 frames for address $15 to hold a value of $20 to write JSR. to solve that, I run ASL <$15 twice when $15 has a value of $07. That sets it to $1C, giving me only 4 frames after that point to have the stack pointer ready for the JSR to F81E. I write LDX #08 so I can store X at a specific point to make sure the code gets executed as I want, then I transfer X to the stack pointer. I need the stack pointer to be 7, so I just push A to the stack pointer, then it all unfolds setting $100 to a value of $20.

as for "How would I make a similar TAS?" Check out the SubNesHawk core! This kind of run requires extensive knowledge of 6502 Assembly, and you should definitely read the notes for the current submission, which I linked above.