Add overflow and auxiliary carry flags manipulation functions

[emu8051.git] / src / reg8051.h

diff --git a/src/reg8051.h b/src/reg8051.h
index 9fc3e48..b484246 100644 (file)
--- a/src/reg8051.h
+++ b/src/reg8051.h
@@ -22,7 +22,6 @@
 #ifndef REG8051_H
 #define REG8051_H 1
 
-
 /* SFR Registers ( $80 - $FF ) */
 #define _ACC_       0xE0
 #define _B_         0xF0
@@ -63,5 +62,14 @@
 #define _BANK2_     0x10
 #define _BANK3_     0x18
 
+#define PSW_BIT_CY 7
+#define PSW_BIT_AC 6
+#define PSW_BIT_OV 2
+#define PSW_BIT_P  0
+
+#define PSW_FLAG_CY (1 << PSW_BIT_CY)
+#define PSW_FLAG_AC (1 << PSW_BIT_AC)
+#define PSW_FLAG_OV (1 << PSW_BIT_OV)
+#define PSW_FLAG_P  (1 << PSW_BIT_P)
 
 #endif /* REG8051_H */