diff --git a/rsc/roguetileset.lua b/rsc/roguetileset.lua
new file mode 100644
index 0000000..09dbcb1
--- /dev/null
+++ b/rsc/roguetileset.lua
@@ -0,0 +1,80 @@
+--the indeces of tiles from an associated tileset
+--this file is intended for use with a generator
+
+--store the tilesheet's format
+local format = {
+	fname = "roguetileset.png",
+	sheetWidth = 256,
+	sheetHeight = 256,
+	tileWidth = 16,
+	tileHeight = 16,
+	countX = 16,
+	countY = 16
+}
+
+--define the walls of the simple "walls" set
+local walls = {
+	--concave
+	nw = format.countX * 0 + 1,	n = format.countX * 0 + 2,	ne = format.countX * 0 + 3,
+	w  = format.countX * 1 + 1,								e  = format.countX * 1 + 3,
+	sw = format.countX * 2 + 1,	s = format.countX * 2 + 2,	se = format.countX * 2 + 3,
+	--convex (corner pieces jutting out)
+	--DOCS: These are named according to the corresponding tile they fit
+	sec = format.countX * 0 + 7, swc = format.countX * 0 + 9,
+	nec = format.countX * 2 + 7, nwc = format.countX * 2 + 9
+}
+
+--define the corridor pieces
+--named for their door locations in the order nesw
+local corridors = {
+	--straight
+	ns = 10, ew = 11,
+
+	--dead ends
+	s = format.countX * 0 + 8,
+	w = format.countX * 1 + 9,
+	n = format.countX * 2 + 8,
+	e = format.countX * 1 + 7,
+
+	--loop (compass)
+	es  = format.countX * 0 + 4, esw  = format.countX * 0 + 5, sw  = format.countX * 0 + 6,
+	nes = format.countX * 1 + 4, nesw = format.countX * 1 + 5, nsw = format.countX * 1 + 6,
+	ne  = format.countX * 2 + 4, new  = format.countX * 2 + 5, nw  = format.countX * 2 + 6
+}
+
+--DEBUG: dump the values
+--[[
+print("walls:")
+for k, v in pairs(walls) do
+	print("", k, v)
+end
+print("corridors:")
+for k, v in pairs(corridors) do
+	print("", k, v)
+end
+--]]
+
+--DEBUG: test the values
+--[[
+local test = {}
+
+for k, v in pairs(walls) do
+	if test[v] then
+		print("Error found: ", k)
+		return
+	end
+	test[v] = true
+end
+
+for k, v in pairs(corridors) do
+	if test[v] then
+		print("Error found: ", k)
+		return
+	end
+	test[v] = true
+end
+
+print("No errors detected")
+--]]
+
+return {format, walls, corridors}
\ No newline at end of file