hexed: add simple io commands

[megadrive.git] / hexed / transfer.h

diff --git a/hexed/transfer.h b/hexed/transfer.h
index b1aa7cd..b5a9817 100644 (file)
--- a/hexed/transfer.h
+++ b/hexed/transfer.h
@@ -1,8 +1,18 @@
+/* all data is big endian */
+
 #define CMD_PREFIX     0x5a
 #define CMD_MD_SEND    0xc1    /* send to MD:   addr[3], len[3], data[] */
 #define CMD_MD_RECV    0xc2    /* recv from MD: addr[3], len[3], data[] */
 #define CMD_JUMP       0xc3    /* jump to addr: addr[3] */
-#define CMD_TEST       0xc4    /* test code */
+#define CMD_IOSEQ      0xc4    /* perform i/o ops: count[2], [type[1], addr[3], data[{0,1,2,4}]]* */
+#define CMD_TEST       0xc5    /* test code */
 
 #define CMD_FIRST      CMD_MD_SEND
 #define CMD_LAST       CMD_TEST
+
+#define IOSEQ_R8       0xb0
+#define IOSEQ_R16      0xb1
+#define IOSEQ_R32      0xb2
+#define IOSEQ_W8       0xb3
+#define IOSEQ_W16      0xb4
+#define IOSEQ_W32      0xb5