-#define REG_SREG_LO 0x0008U
-#define REG_SREG_HI 0x0010U
-#define REG_TMP1 0x0020U
-#define REG_TMP2 0x0040U
-#define REG_TMP3 0x0080U
-#define REG_PTR1_LO 0x0100U
-#define REG_PTR1_HI 0x0200U
-#define REG_PTR2_LO 0x0400U
-#define REG_PTR2_HI 0x0800U
-#define REG_PTR3_LO 0x1000U
-#define REG_PTR3_HI 0x2000U
-#define REG_PTR4_LO 0x4000U
-#define REG_PTR4_HI 0x8000U
-#define REG_AX (REG_A | REG_X)
-#define REG_EAX (REG_A | REG_X | REG_SREG_LO | REG_SREG_HI)
-#define REG_XY (REG_X | REG_Y)
-#define REG_AXY (REG_A | REG_X | REG_Y)
-#define REG_SREG (REG_SREG_LO | REG_SREG_HI)
+#define REG_TMP1 0x0008U
+#define REG_PTR1_LO 0x0010U
+#define REG_PTR1_HI 0x0020U
+#define REG_PTR2_LO 0x0040U
+#define REG_PTR2_HI 0x0080U
+#define REG_SREG_LO 0x0100U
+#define REG_SREG_HI 0x0200U
+#define REG_SAVE_LO 0x0400U
+#define REG_SAVE_HI 0x0800U
+#define REG_SP_LO 0x1000U
+#define REG_SP_HI 0x2000U
+
+
+/* Combined register defines */