return_of_samus:data_locations:ram_map
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| Both sides previous revisionPrevious revisionNext revision | Previous revisionLast revisionBoth sides next revision | ||
| return_of_samus:data_locations:ram_map [2019/06/28 21:47] – Clarifications and a few new offsets kkzero | return_of_samus:data_locations:ram_map [2020/04/03 20:07] – kkzero | ||
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| Line 118: | Line 118: | ||
| C415: left-most visible metatile column index in map * $10 (big-endian word). | C415: left-most visible metatile column index in map * $10 (big-endian word). | ||
| + | C417: Number of tile that Baby Metroid is touching. | ||
| C418: Set to [$D058] in $2:4000 | C418: Set to [$D058] in $2:4000 | ||
| Line 594: | Line 595: | ||
| D0A7: Metroids remaining in area | D0A7: Metroids remaining in area | ||
| + | |||
| + | D600-1F: OAM data for the starry background in the credits. | ||
| D700-3F: Screen transition commands | D700-3F: Screen transition commands | ||
| Line 642: | Line 645: | ||
| DD00-FF: Projectile RAM | DD00-FF: Projectile RAM | ||
| + | Beams - Takes up three 16-byte rows for each shot on-screen. Spazer and Plasma take up all three immediately. | ||
| + | DD00, DD10, DD20: Beam state. | ||
| + | 0-4: On-screen, being fired. Value will match the currently-equipped beam's as stored at D055. | ||
| + | FFh: Not on-screen. | ||
| + | DD01, DD11, DD21: Direction of fire. | ||
| + | 1: To the right. | ||
| + | 2: to the left. | ||
| + | 4: Upwards. | ||
| + | 8: Downwards. | ||
| + | DD02, DD12, DD22: Shot Y position. | ||
| + | DD03, DD13, DD23: Shot X position. | ||
| + | DD04, DD14, DD24: Unknown, switches between 0 and 8 on a seemingly random interval between firings. | ||
| + | DD05, DD15, DD25: Displacement from position fired at, ends up differently for each direction. | ||
| + | | ||
| + | Missiles - Shares a 16-byte row with the third beam slot. | ||
| + | DD20: Missile state. | ||
| + | 8: On-screen, being fired. | ||
| + | FFh: Not on-screen. | ||
| + | DD21: Direction of fire. | ||
| + | 1: To the right. | ||
| + | 2: to the left. | ||
| + | 4: Upwards. | ||
| + | 8: Downwards. | ||
| + | DD22: Shot Y position. | ||
| + | DD23: Shot X position. | ||
| + | DD24: Unknown, switches between 0 and 8 on a seemingly random interval between firings. | ||
| + | DD25: Displacement from position fired at, ends up differently for each direction. | ||
| + | | ||
| + | Bombs - Takes up three 16-byte rows for each bomb on-screen. | ||
| + | DD30, DD40, DD50: Bomb state. | ||
| + | 1: Laid, waiting to explode. | ||
| + | 2: Exploding. | ||
| + | FFh: No bomb on-screen. | ||
| + | DD31, DD41, DD51: Bomb timer. Starts at the value it was set at and decreases to zero. | ||
| + | DD32, DD42, DD52: Bomb Y position. | ||
| + | DD33, DD43, DD53: Bomb X position. | ||
| + | | ||
| DE00-FF: Metatile update entries | DE00-FF: Metatile update entries | ||
| + 0: Dest. address. $0000 terminates update | + 0: Dest. address. $0000 terminates update | ||
return_of_samus/data_locations/ram_map.txt · Last modified: 2020/04/04 20:15 by kkzero
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