RoomObjectsBuffer
Information about the current room's moving objects is stored in 7E00. Each entry takes up $21 bytes.
00-01 Current screen position
02-03 Bounds 1
04-05 Bounds 2
06 Bit 7 : Set for up / down, reset for left : right
07 UDG height
08 UDG width
09 Attribute
0A-0B Graphic base address
0C-0D Extended graphic
0E Offset between animation frames
0F Next animation frame
14-15 UDG size
16-17 Offset for reverse direction graphic
1A Speed (lower = faster, 0 = stationary)
1D-1E UDG 1 size
1F-20 UDG 2 size