diff --git a/docs/gpu.txt b/docs/gpu.txt
index 98df39d..80427ad 100644
--- a/docs/gpu.txt
+++ b/docs/gpu.txt
@@ -12,6 +12,7 @@ Example:
 		{command="send",buffer=0,channel="example"}
 	}
 	
+Invalid commands or commands with missing/invalid parameters will be ignored.
 
 Command: createbuffer
 ---------------------
@@ -33,6 +34,19 @@ Parameters:
 buffer [integer 0-7]: The buffer to send the contents of.
 channel [string]: The digilines channel to send the message on.
 
+Command: sendregion
+-------------------
+
+Sends part of the contents of a buffer to a digiscreen, rgblightstone panel, or other digilines device.
+
+Parameters:
+buffer [integer 0-7]: The buffer to send part of the contents of.
+channel [string]: The digilines channel to send the message on.
+x1 [integer 1-64]: The X position of the left side of the region to send.
+x2 [integer 1-64]: The X position of the right side of the region to send.
+y1 [integer 1-64]: The Y position of the top side of the region to send.
+y2 [integer 1-64]: The Y position of the bottom side of the region to send.
+
 Command: drawrect
 -----------------
 
diff --git a/gpu.lua b/gpu.lua
index 87ff6ea..9529002 100644
--- a/gpu.lua
+++ b/gpu.lua
@@ -201,6 +201,33 @@ local function runcommand(pos,meta,command)
 		if type(buffer) == "table" then
 			digiline:receptor_send(pos,digiline.rules.default,command.channel,buffer)
 		end
+	elseif command.command == "sendregion" then
+		if type(command.buffer) ~= "number" or type(command.channel) ~= "string" then return end
+		local bufnum = math.floor(command.buffer)
+		if bufnum < 0 or bufnum > 7 then return end
+		local buffer = meta:get_string("buffer"..bufnum)
+		if string.len(buffer) == 0 then return end
+		buffer = minetest.deserialize(buffer)
+		if type(buffer) ~= "table" then return end
+		if type(command.x1) ~= "number" or type(command.x2) ~= "number" or type(command.y1) ~= "number" or type(command.x2) ~= "number" then return end
+		local x1 = math.min(64,math.floor(command.x1))
+		local y1 = math.min(64,math.floor(command.y1))
+		local x2 = math.min(64,math.floor(command.x2))
+		local y2 = math.min(64,math.floor(command.y2))	
+		if x1 < 1 or y1 < 1 or x2 < 1 or y2 < 1 then return end
+		x2 = math.min(x2,buffer.xsize)
+		y2 = math.min(y2,buffer.ysize)
+		if x1 > x2 or y1 > y2 then return end
+		local tempbuf = {}
+		for y=y1,y2,1 do
+			local dsty = y-y1+1
+			tempbuf[dsty] = {}
+			for x=x1,x2,1 do
+				local dstx = x-x1+1
+				tempbuf[dsty][dstx] = buffer[y][x]
+			end
+		end
+		digiline:receptor_send(pos,digiline.rules.default,command.channel,tempbuf)
 	elseif command.command == "drawrect" then
 		if type(command.buffer) ~= "number" or type(command.x1) ~= "number" or type(command.y1) ~= "number" or type(command.x2) ~= "number" or type(command.y2) ~= "number" then return end
 		local bufnum = math.floor(command.buffer)