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--- return_of_samus:technical_information:level_data_banks [2016/07/18 12:53] – [Screen Transitions Indexes] zero_one
+++ return_of_samus:technical_information:level_data_banks [2022/04/28 05:22] (current) – [Screen Transitions Indexes] rt-55j
@@ Line 91: / Line 91: @@
 The next 0x200 (dec: 512) bytes form another 16x16 array of little-endian two-byte values. They serve two functions:
-  - One of the bits of the value (bin:wwwwxxxxyyyy-zzz) determines the priority of Samus' sprite relative to the background for the screen. Yes, really. They put it here of all places. It has no bearing on the screen transition.
+  - The twelfth bit of the value (set/detected with the bitmask 0x0800) determines the priority of Samus' sprite relative to the background for the screen (yes, really). When reading the index of the screen transition, this bit is masked out and ignored.
   - The value itself specifies the screen transition number that the screen uses. The data that governs what each screen transition does is located in bank 5.
@@ Line 97: / Line 97: @@
 ===== Level Data Chunks =====
-I know how this works, but I gotta write it down first.
+the next 0x5900 (dec: 15104) bytes are the 59 level data chunks. each chunk is 16x16 bytes. each byte is one tile, and they are orginized 100% linearly. take the final chunk for example (which is, ironically, the first screen you ever see):
+<code>
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+c|0c|0d|0e|0f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+|16|17|12|18|19|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+|21|22|23|24|25|26|7f|7f|7f|7f|7f|7f|7f|7f|7f
+d|2e|2f|30|31|32|33|7f|7f|7f|7f|7f|7f|7f|7f|7f
+|05|06|07|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f|7f
+f|7f|7f|7f|7f|7f|7f|76|7f|71|70|74|73|76|70|7f
+|39|39|39|39|39|39|39|39|39|39|39|39|39|39|39
+</code>
+all you really need to know to understand what I mean is that 7f is air tiles, and 39 is ground tiles. if you DO want to have a breakdown of tiles hex values, see [[return_of_samus:technical_information:tile_breakdown | Tile Breakdown]]

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