memory.md

Memory

Addresses are 1 tryte long, giving 19683T of memory. Note that just like everything else, memory addresses are signed.

Address	Size	Symbol	Description
---------	486		Input
----+----	6561		3D map data
o---+----	2916	$TILEMAP	2D map data
ooo-+----	202		Reserved
ooooooooo	9841		User code and data

Input

Offset	Size	Symbol	Description
0	1	$MOUSE_X	-243 - 243
1	1	$MOUSE_Y	-243 - 243
2	1	$MOUSE_BTNS	See below
3	483	Reserved

$MOUSE_BTNS

The $MOUSE_BTNS tryte is made up of three trybbles:

LLL MMM RRR
|   |   |
|   |   +---- Right mouse button
|   |
|   +-------- Middle mouse button
|
+------------ Left mouse button

For each trybble, the value 0 means the button is not down, and a value of 1 means the button is down. Other values are reserved for later use.

3D map data

A contiguous array of 27x9x27 (6561T) cells. Not yet implemented.

2D map data

A contiguous array of 54x54 tiles:

Offset	Size	Description
0t	3t	Tileset U
3t	2t	Tileset V
5t	4t	Unused.

2D elements are always drawn on top of 3D elements.