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Author Topic: FF II: A Threat from Within - Expanded ROM = New Features!  (Read 37724 times)

chillyfeez

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Re: FF II: A Threat from Within - Expanded ROM = New Features!
« Reply #300 on: November 21, 2017, 07:44:49 PM »
Ok. There is only one instance of STA $2101 in the entire Namingway loading routine, but if I alter the value written to 2101 it messes up Namingway, the character battle sprites, and the finger cursor. So I guess that means those are all sprites (I was already pretty sure the characters and the finger were)?

Quote from: Squall on November 21, 2017, 05:05:55 PM
To change where X,Y you must convert X,Y in video memory address and then write it in $2116. If you want to change x+1, the address must be increased by 2. Also x+1 mean 8 pixels to the right :D
Ok, so... The routine writes 4600 to $2116, and I can see the Namingway image data gets written to $8C00 (4600 * 2), but it doesn't seem like increasing that 4600 by 2 shifts the image to the right... is it definitely the value written to 2116 that I would need to change?
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Squall

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Re: FF II: A Threat from Within - Expanded ROM = New Features!
« Reply #301 on: November 22, 2017, 06:18:35 AM »
Please don't alter the $2101, just read the value written there, particularly bits 5-7 (sets Sprite size).
Post the code here, so we can delve in details. Keep in mind that reading/writing to video could be auto-incremented. So even if you have initial value in the address ($2116), if you have some read/writes ($2118/$2139) after initialization and the code you are looking, the address has been already changed! Besides as I said the transfer could be done trough DMA/HDMA ... it all depends.

You know what? Lets do something else:
 - Download vSNES (the tool I've talk about)
 - Make sure you use zSNES as emulator. Load the ROM and when the namingway screen pops up - make a savestate
 - Send me or attach here that savestate
* You can check for yourself many things in vSNES - like what mode you use, layers, tiles, sprites,...
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chillyfeez

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Re: FF II: A Threat from Within - Expanded ROM = New Features!
« Reply #302 on: November 23, 2017, 10:29:07 PM »
Hey, Squall - I made a new thread for this project. Let's continue the discussion there, OK?
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