Mother 3/Door/hotspot table

Door/hotspot table
Game	MOTHER 3
Start Address	0x111DEB4
End Address	0x112C38F
# of Entries	2000 (0x7D0)
Entry Length	Variable
Total Length	58588 bytes (0xE4DC)
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Overview

The door/hotspot table contains both door and hotspot entries. Each map has one door collection and one hotspot collection. Since there are 1000 maps, and separate door and hotspot collections for each map, then this table has 2000 entries, as expected. There is an offset table at the beginning pointing to each collection of doors/hotspots.

The entries in this table are interleaved; if your map index is X, then

door index = X * 2
hotspot index = (X * 2) + 1

Format

There's no data indicating how many doors or hotspots are in each map. To figure it out, you instead have to keep parsing doors/hotspots sequentially until a null entry occurs.

Doors and hotspots have a similar format. Each one uses 12 (0xC) bytes.

Doors

• 00-01 (02) = Bitfield
• 02-07 (06) = Unclassified data
• 08-09 (02) = Destination
• 0A-0A (01) = X
• 0B-0B (01) = Y

Door bitfield

• 0x00C0 = (Width - 1), in units of 16 pixels
• 0x0300 = (Height - 1), in units of 16 pixels
• 0xFC3F = Unknown

Door destination

This value is an index into the door destination table.

Hotspots

• 00-03 (04) = Bitfield
• 04-07 (04) = Unclassified data
• 08-09 (02) = Destination
• 0A-0A (01) = X
• 0B-0B (01) = Y

=Hotspot bitfield

• 0x0003E000 = (Width - 1), in units of 16 pixels
• 0x007C0000 = (Height - 1), in units of 16 pixels
• 0xFF801FFF = Unknown

Hotspot destination

It's unknown how the hotspot destination is handled.

Location

Both doors and hotspots use the same format for location. X and Y are both in units of 16 pixels.