--- a/backend.h	Sun Dec 31 10:11:16 2017 -0800
+++ b/backend.h	Tue Dec 25 11:12:26 2018 -0800
@@ -49,42 +49,7 @@
 	uint32_t             address;
 } deferred_addr;
 
-typedef enum {
-	READ_16,
-	READ_8,
-	WRITE_16,
-	WRITE_8
-} ftype;
-
-#define MMAP_READ      0x01
-#define MMAP_WRITE     0x02
-#define MMAP_CODE      0x04
-#define MMAP_PTR_IDX   0x08
-#define MMAP_ONLY_ODD  0x10
-#define MMAP_ONLY_EVEN 0x20
-#define MMAP_FUNC_NULL 0x40
-#define MMAP_BYTESWAP  0x80
-#define MMAP_AUX_BUFF  0x100
-
-typedef uint16_t (*read_16_fun)(uint32_t address, void * context);
-typedef uint8_t (*read_8_fun)(uint32_t address, void * context);
-typedef void * (*write_16_fun)(uint32_t address, void * context, uint16_t value);
-typedef void * (*write_8_fun)(uint32_t address, void * context, uint8_t value);
-
-typedef struct {
-	uint32_t     start;
-	uint32_t     end;
-	uint32_t     mask;
-	uint32_t     aux_mask;
-	uint16_t     ptr_index;
-	uint16_t     flags;
-	void *       buffer;
-	read_16_fun  read_16;
-	write_16_fun write_16;
-	read_8_fun   read_8;
-	write_8_fun  write_8;
-} memmap_chunk;
-
+#include "memmap.h"
 #include "system.h"
 
 typedef struct {