1 files changed, 6 insertions, 0 deletions
diff --git a/bus.h b/bus.h
index e8bfa3a..7031e95 100644
--- a/bus.h
+++ b/bus.h
@@ -17,6 +17,12 @@
 #define OUTPUT_RELAY 4          /* output enable/disable relay */
 #define PW_ENABLE 5             /* TTL enable/disable output */
 
+// A5, A6 used to select chips
+#define Octal_DACportCS_low	0x00
+#define Octal_DACportCS_high	0x20
+#define TNT_Port		0x40
+
+
 #define GPIOPIN0BASE 0
 #define GPIOPIN1BASE 0
 #define GPIOPIN2BASE 0