optim, try different dispatch strategies, add reset handler

inc/mem_seg.h

@@ -13,9 +13,9 @@
 
 
 
-#define MEMDATA_GP_REGS 1
-#define MEMDATA_IO_REGS 2
-#define MEMDATA_DS     3
+#define MEMDATA_GP_REGS 2
+#define MEMDATA_IO_REGS 3
+#define MEMDATA_DS     4
 #define MEMDATA_OPSIZE  5
 
 
@@ -27,7 +27,8 @@
 	{MEMSEG_PC_SEG_NUM, "PC", 2, 1, 0, 0}, \
 	{MEMDATA_IO_REGS, "IO_REG", 1, 255, (1024 * 2) + 2, 0}, \
 	{MEMDATA_GP_REGS, "GP_REG", 1, 32, (1024 * 2) + 2 + 255, 0}, \
-	{MEMDATA_DS, "DS", 1, 65535, 2, 0} \
+	{MEMDATA_DS, "DS", 1, 65535, 2, 0}, \
+    {MEMDATA_OPSIZE, "OPSIZE", 1, 1, (1024 * 2) + 2 + 255 + 32, 0} \
 }
 
 #endif //ifndef __MEM_SEG_H__