typedef u32 (cpu68k_read_f)(u32 a);
typedef void (cpu68k_write_f)(u32 a, u32 d);
+extern u32 m68k_read8(u32 a);
+extern u32 m68k_read16(u32 a);
+extern void m68k_write8(u32 a, u8 d);
+extern void m68k_write16(u32 a, u16 d);
+
// z80
#define Z80_MEM_SHIFT 13
extern uptr z80_read_map [0x10000 >> Z80_MEM_SHIFT];
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);
-#define map_flag_set(x) ((x) & ((uptr)1 << (sizeof(uptr) * 8 - 1)))
+#define MAP_FLAG ((uptr)1 << (sizeof(uptr) * 8 - 1))
+#define map_flag_set(x) ((x) & MAP_FLAG)
#define MAKE_68K_READ8(name, map) \
u32 name(u32 a) \
} \
}
+static __inline void *m68k_dma_source(u32 a)
+{
+ uptr v;
+ a &= 0x00fffffe;
+ v = m68k_read16_map[a >> M68K_MEM_SHIFT];
+ if (map_flag_set(v))
+ return NULL;
+ else
+ return (void *)((v << 1) + a);
+}
+
+// 32x
+typedef struct {
+ uptr addr; // stores (membase >> 1) or ((handler >> 1) | (1<<31))
+ u32 mask;
+} sh2_memmap;