Therefore, the full patch is available as a script. Since it doesn't include code to actually setup the screen, we can reuse the interrupt handler code for that, then call the music tracker function during the main game loop, with the following changes:Ġ006a3d2 = 4e f9 00 00 08 7e jump into the interrupt handlerĠ0000972 = 4e f9 00 06 a4 18 after loading font, jump back to the main game loopĠ006a412 = 4e 71 4e 71 4e 71 skip loading title screen graphicsĠ006a428 = 4e 71 4e 71 4e 71 same as 0006a412Ġ006a45e = 4e 71 4e 71 4e 71 same as 0006a412Ġ006a49c = 4e b9 00 07 84 e2 call music tracker functionĪdditionally, this screen also requires the same overwritten bitmap font. Shows the notes being played in a song, and if any sound effects are applied, they are shown at the bottom.įunction 000784e2 contains the logic for outputting this data to the screen. (Source: Original TCRF research) Music Tracker Afterwards, we also need to update the data address referenced by the font loading function to instead use the address of the overwritten data.ĭue to the size of the full patch, it's available as a script.
from Keyboard Pico: Kantan Waku Waku Keyboard) and write it on top of existing graphics data. However, we can copy a compatible font from another ROM (e.g. Unfortunately, this isn't sufficient to get readable text, since the original bitmap font used for this screen was overwritten with code. To activate it, we can replace one of the function calls at startup to instead call one of the interrupt vectors, by applying patch 000002e0 = 08 7e. A generic error handler for displaying an error message with a dump of register values, called by interrupt vectors.
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