copy maxtile buffer #3 to OAM table ($0338 > $03F8 > B#3).at the end of the frame, if $3F is not zero, copy $0200+2*(value&$FE)- $03FC to maxtile buffer #0 ( > B#0).do the same procedure for every regular sprite.otherwise, MaxTile will flush $0338-$03F8.if the player is on a boss battle, MaxTile will flush slots $0338-$03AC.if the player is behind scenery, MaxTile will flush slots $0338-$03CC.before leaving, NMSTL calls a MaxTile routine that flushes the used OAM slots from range $0338-$03F8 to buffer #3.every time a sprite is executed NMSTL will select slot #$38.at the beginning of the frame, all maxtile buffers are invalidated (cleared).Because of that, MaxTile willĪutomatically move OAM tiles from $0200-$03FF to the MaxTile buffers though the frame to keepĬompatibility with all existing resources. Sprites will ever appear because the buffers are completely empty. Of course if nobody uses the MaxTile API directly, no tile from the original game nor from old MaxTile always calculates how many tiles each buffer has before copying the lowest priority and will always priorize buffers with higher priority. Even if the buffer copy order is reversed (buffer #3 is copied to end of OAM table then buffer #2, buffer #1 and buffer #0), earlier buffers will always have priority over latter buffers.If MaxTile notices that the 128 tile limit was exceeded, it will stop copying further tiles.
Although the four buffers combined allows up to 512 sprite tiles, the SNES PPU has the limit of 128 sprite tiles.They are copied to $0200-$03FF backwards, the copy will start at $03FC, then $03F8, $03F4, etc., When the four priority buffers are assembled into a single buffer, the OAM table ($0200-$03FF) will If preferred, you can take one of the maxtile pointers, subtract by the amount of tiles you willĭraw and run your graphics routine normally incrementing Y without having to reorder your drawing Tiles drawn at end of the frame will have the highest priority. Same maxtile buffer, tiles drawn at the beginning of the frame will have lowest priority and Priority and your last tile will have the highest priority. You write to each buffer in backwards order, which means that your first tile will have the lowest #0 is called max buffer, #1 is called high buffer, #2 normal buffer (appears in front of all other OAM tiles) and #3 is the lowest priority (appears behind all OAM MaxTile provides four different priorities, from #0 to #3, where #0 is the highest priority Restores the original priority behavior of Super Mario World, which was incorrectly reserved on NMSTL and.High compatibility with already designed sprites, including vanilla sprites, mode 7 bosses, overworld, behind scenery behavior, Yoshi and Lakitu.Allows up to 128 sprites tiles on screen.Leaves the standard OAM table untouched till the end of the frame (with exceptions of regular sprites).Shared MaxTile routines for easier integration.Provides four OAM tables for different spritesprite priorities.Possible compatibility with the vanilla sprites and custom sprites designed before the system. OAM slots on Super Mario World regardless of the sprite type or game mode and keeping the maximum MaxTile is a new feature developed for SA-1 Pack v1.40 designed to effectively use all available
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