Based on the 3 filters (1x (START+SELECT), 1.25x (default), and 1.5x (used only in GBA mode)) found inside TWL_FIRM, I reverse engineered most of the capture card's image processor (used to capture DS and GBA screens), and made my own filters to show that sharp upscaling can be done.
But that's not all! Since the initial patcher (which was only able to change the upscaling filter), a lot of work has been done:
- Remove the DPAD input filter, so you can press LEFT+RIGHT and UP+DOWN...
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Source:
https://gbatemp.net/threads/twpatcher-d ... es.542694/