YI Memory Map - SMW Central

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Time: 2021-10-23 05:41:32 AM

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Tip: Fix any errors you see before releasing any demos; "I'll fix it later" isn't a good excuse.

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RAM Address	Length	Type	Description	Details
$7F0000	22238 bytes	Empty	Unused RAM, cleared (with $00) via DMA during reset as well as before and after Nintendo logo
$7F56DE	438 bytes	Object Palette	Blue channel of background gradient ($2132 COLDATA) Covers entire sublevel (NOT just screen) from top to bottom, one byte per entry, representing every eighth X pixel row in sublevel
$7F5894	876 bytes	Object Palette	Green & Red channel of background gradient ($2132 COLDATA) Covers entire sublevel (NOT just screen) from top to bottom, two bytes per entry, representing every eighth X pixel row in sublevel: Byte 1: Green Channel Byte 2: Red channel
$7F7E00	512 bytes	Level Data	All screen exit data for current level, in screen region order ($00-$7F), 4 bytes per exit: LLLLLLLL XXXXXXXX YYYYYYYY EEEEEEEE L = Destination Level (between 00 and DD) X = Destination X-Coordinate Y = Destination Y-Coordinate E = Destination Entrance Type (this follows the same format as $7000AC, Yoshi state)
$7F8000	32768 bytes	Layer 1 Tilemap	Table that holds all foreground MAP16 tile data for the entire sublevel currently loaded. Split up by screen ID's then further into row-major tile #. Data is word-sized MAP16 indices.

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