-#define STATUS_RUS_MASK 0x003C // Receive Unit Status
-#define STATUS_CUS_MASK 0x00C0 // Comamnd Unit Status
-#define STATUS_FCP 0x0100 // Flow Control Pause
-#define STATUS_ER 0x0200 // Early Recieve
-#define STATUS_SWI 0x0400 // Software Interrupt
-#define STATUS_MDI 0x0800 // Management Data Interrupt
-#define STATUS_RNR 0x1000 // Receive Not Ready
-#define STATUS_CNA 0x2000 // Command Unit not active
-#define STATUS_FR 0x4000 // Frame Recieved
-#define STATUS_CX 0x8000 // Command Unit executed
+#define STATUS_RUS_MASK 0x3C // Receive Unit Status
+#define STATUS_CUS_MASK 0xC0 // Comamnd Unit Status
+#define ISR_FCP 0x01 // Flow Control Pause
+#define ISR_ER 0x02 // Early Recieve
+#define ISR_SWI 0x04 // Software Interrupt
+#define ISR_MDI 0x08 // Management Data Interrupt
+#define ISR_RNR 0x10 // Receive Not Ready
+#define ISR_CNA 0x20 // Command Unit not active
+#define ISR_FR 0x40 // Frame Recieved
+#define ISR_CX 0x80 // Command Unit executed