--- /dev/null
+// memory map related stuff
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#define M68K_MEM_SHIFT 16
+
+extern unsigned long m68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long m68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long m68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long m68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
+
+extern unsigned long s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];
+extern unsigned long s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];
+
+void z80_map_set(unsigned long *map, int start_addr, int end_addr,
+ void *func_or_mh, int is_func);
+void cpu68k_map_set(unsigned long *map, int start_addr, int end_addr,
+ void *func_or_mh, int is_func);
+void cpu68k_map_all_ram(int start_addr, int end_addr, void *ptr, int is_sub);
+void m68k_map_unmap(int start_addr, int end_addr);
+
+// top-level handlers that cores can use
+// (or alternatively build them into themselves)
+// XXX: unhandled: *16 and *32 might cross the bank boundaries
+typedef u32 (cpu68k_read_f)(u32 a);
+typedef void (cpu68k_write_f)(u32 a, u32 d);
+
+#define MAKE_68K_READ8(name, map) \
+u32 name(u32 a) \
+{ \
+ unsigned long v; \
+ a &= 0x00ffffff; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ if (v & 0x80000000) \
+ return ((cpu68k_read_f *)(v << 1))(a); \
+ else \
+ return *(u8 *)((v << 1) + (a ^ 1)); \
+}
+
+#define MAKE_68K_READ16(name, map) \
+u32 name(u32 a) \
+{ \
+ unsigned long v; \
+ a &= 0x00fffffe; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ if (v & 0x80000000) \
+ return ((cpu68k_read_f *)(v << 1))(a); \
+ else \
+ return *(u16 *)((v << 1) + a); \
+}
+
+#define MAKE_68K_READ32(name, map) \
+u32 name(u32 a) \
+{ \
+ unsigned long v, vs; \
+ u32 d; \
+ a &= 0x00fffffe; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ vs = v << 1; \
+ if (v & 0x80000000) { \
+ d = ((cpu68k_read_f *)vs)(a) << 16; \
+ d |= ((cpu68k_read_f *)vs)(a + 2); \
+ } \
+ else { \
+ u16 *m = (u16 *)(vs + a); \
+ d = (m[0] << 16) | m[1]; \
+ } \
+ return d; \
+}
+
+#define MAKE_68K_WRITE8(name, map) \
+void name(u32 a, u8 d) \
+{ \
+ unsigned long v; \
+ a &= 0x00ffffff; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ if (v & 0x80000000) \
+ ((cpu68k_write_f *)(v << 1))(a, d); \
+ else \
+ *(u8 *)((v << 1) + (a ^ 1)) = d; \
+}
+
+#define MAKE_68K_WRITE16(name, map) \
+void name(u32 a, u16 d) \
+{ \
+ unsigned long v; \
+ a &= 0x00fffffe; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ if (v & 0x80000000) \
+ ((cpu68k_write_f *)(v << 1))(a, d); \
+ else \
+ *(u16 *)((v << 1) + a) = d; \
+}
+
+#define MAKE_68K_WRITE32(name, map) \
+void name(u32 a, u32 d) \
+{ \
+ unsigned long v, vs; \
+ a &= 0x00fffffe; \
+ v = map[a >> M68K_MEM_SHIFT]; \
+ vs = v << 1; \
+ if (v & 0x80000000) { \
+ ((cpu68k_write_f *)vs)(a, d >> 16); \
+ ((cpu68k_write_f *)vs)(a + 2, d); \
+ } \
+ else { \
+ u16 *m = (u16 *)(vs + a); \
+ m[0] = d >> 16; \
+ m[1] = d; \
+ } \
+}
+