diff --git a/src/memory.c b/src/memory.c
index 6b55ebb..5a22839 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -1,5 +1,24 @@
 #include <stdint.h>
-#include "memory.h"
+#include "config.h"
+
+extern void scanKeyboard();
+extern void writeVideo();
+extern uint8_t readVideo();
+extern uint8_t videoX;
+extern uint8_t videoY;
+extern uint8_t videoMode;
+extern uint8_t videoA;
+
+static int8_t ram[RAMSIZE + 1];
+static int8_t rom[ROMSIZE + 1];
+
+static uint8_t systemRegister;
+static uint8_t keyboardResult;
+
+
+uint8_t read6502(uint16_t address);
+void write6502(uint16_t address, uint8_t value);
+
 
 uint8_t read6502(uint16_t address){
 	switch (address){