cd: integrate new gfx code

pico/cd/genplus_macros.h

@@ -0,0 +1,24 @@
+#undef uint8
+#undef uint16
+#undef uint32
+#undef int8
+#undef int16
+#undef int32
+
+#define uint8  unsigned char
+#define uint16 unsigned short
+#define uint32 unsigned int
+#define int8  signed char
+#define int16 signed short
+#define int32 signed int
+
+#define READ_BYTE(BASE, ADDR) (BASE)[(ADDR)^1]
+#define WRITE_BYTE(BASE, ADDR, VAL) (BASE)[(ADDR)^1] = (VAL)
+
+#define load_param(param, size) \
+  memcpy(param, &state[bufferptr], size); \
+  bufferptr += size;
+  
+#define save_param(param, size) \
+  memcpy(&state[bufferptr], param, size); \
+  bufferptr += size;