This is based on the information Zeemis posted at
http://www.ff6hacking.com/forums/showthread.php?tid=925. Note that the addresses are different for the US version of the ROM.
The last bit of this post was a "control code," which had very little information. This is similar (but not exactly the same) to animation details that I worked out on FF5. It's a set of instructions to process how sprites act during the animation. I've done a little work on it which I'm presenting here. I'll probably come back to it from time to time, but I don't want to focus my energy on it.
So this is the code for 00C1, which is the Fire animation:
| 40 00 | Animation Speed |
| 90 00 | Clear Sprite Flag #40, Set XX |
| EB 58 5D 5E 5D 65 5D | Branch Based On Subsprite Number |
| C9 00 | Play Sound |
| 80 3B | Subcommand 3B (Show Target Mask) |
| 83 99 | Move Sprite |
| 8B 04 | While Loop XX Times |
| 00 | Next frame? |
| 80 3C | Subcommand 3C (Clear Target Mask) |
| 8C | Iterate While Loop |
| FF | End Animation |
| 83 79 | Move Sprite |
| 8B 04 | While Loop XX Times |
| 00 | Next frame? |
| 8C | Iterate While Loop |
| FF | End Animation |
Running through it with brief notes:
1) First two bytes are animation speed and an unknown byte, higher is slower
2) 90: Handles setting bits #10 and #20 of 6F86,X. Bit #20 controls transparency effect; clear means on, set means off)
3) EB: Jumps forward based on which subsprite we're on; Fire has three, so three branches
4) C9: Play sound; I believe 00 tells it to use the default
5) 80: Runs a subcommand based on the parameter. 3B masks the target with the spell palette.
6) 83: Moves the spell sprite; #1F is the amount, #E0 is the direction
7) 8B/8C: Does a while loop - loops over the code xx times. 89/8A is the for loop version. The difference is that the for loop counts what loop we're on, the while loop does not.
8) 00: Not sure; numbers less than #80, like in FF5, seem to indicate frames to display. I think 00 is short hand for "next frame." However, it could just be a way of pausing with a while loop.
9) 80 3C: clears the target mask.
10) FF: Signals the end of the animation
We have EVEN MORE themes now, but some old ones are gone...