diff --git a/2019/day19.py b/2019/day19.py
new file mode 100644
index 0000000..a31daa2
--- /dev/null
+++ b/2019/day19.py
@@ -0,0 +1,31 @@
+from grid import Grid
+from intcode import Intcode
+from tools import parse_intcode
+
+
+def main():
+    codes = parse_intcode("day19.txt")
+    area = Grid()
+    for y in range(50):
+        for x in range(50):
+            mgr = DroneMgr(codes)
+            mgr.run(inputs=[x, y])
+            area.setv(x, y, mgr.output)
+    area.dumb_print()
+    num_affected = sum(v for _, _, v in area.values_gen())
+    print("Num affected:", num_affected)
+
+
+class DroneMgr(Intcode):
+    
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.inputs = [0, 0]
+        self.output = None
+
+    def output_data(self, data):
+        self.output = data
+
+
+if __name__ == "__main__":
+    main()
diff --git a/2019/intcode.py b/2019/intcode.py
index 0afc2fe..344fe1e 100644
--- a/2019/intcode.py
+++ b/2019/intcode.py
@@ -1,7 +1,6 @@
-""" Intcode interpreter. Day 11. """
+"""Intcode interpreter."""
 
 from enum import IntEnum
-import sys
 
 
 class Op(IntEnum):
@@ -32,19 +31,19 @@ class Intcode(object):
         self.ctx_op = None
         self.ctx_modes = None
         self.halt = False
-        self.inputs = None
         self.debug = debug
+        self._inputs_list = None
 
     @staticmethod
     def parse_input(text):
         return [int(i) for i in text.rstrip().split(",")]
-    
+
     def log(self, message, *args):
         if self.debug:
             print("debug:", message, *args)
-    
+
     def run(self, inputs=None):
-        self.inputs = inputs or []
+        self._inputs_list = inputs or []
         handlers = self.get_handlers()
         while not self.halt:
             self.read_code()
@@ -67,7 +66,7 @@ class Intcode(object):
     def mem_get(self, pos):
         self._check_memory_limits(pos)
         return self._memory[pos]
-    
+
     def mem_set(self, pos, value):
         self._check_memory_limits(pos)
         self._memory[pos] = value
@@ -99,7 +98,7 @@ class Intcode(object):
         elif mode == PMode.REL:
             address = self.rel_base + self.mem_get(self.ip + index)
             return address if pointer else self.mem_get(address)
-    
+
     def write_at_param(self, param_offset, value):
         self.mem_set(self.param(param_offset, pointer=True), value)
 
@@ -147,7 +146,7 @@ class Intcode(object):
         self.halt = True
 
     def input_data(self):
-        return self.inputs.pop(0)
-    
+        return self._inputs_list.pop(0)
+
     def output_data(self, data):
         print(">", data)
diff --git a/tools.py b/tools.py
new file mode 100644
index 0000000..a877584
--- /dev/null
+++ b/tools.py
@@ -0,0 +1,6 @@
+from intcode import Intcode
+
+
+def parse_intcode(filename):
+    with open(filename, "rt") as input_file:
+        return Intcode.parse_input(input_file.read().rstrip())