diff --git a/6502.h b/6502.h
index 524a20a..37041e2 100644
--- a/6502.h
+++ b/6502.h
@@ -1,4 +1,5 @@
 #include <stdint.h>
+#include <stdbool.h>
 
 #define CPU_FREQ 4000000
 #define STEP_DURATION 10000000 // 10ms
@@ -20,14 +21,14 @@ void * read_addr;
 void * write_addr;
 
 struct StatusBits{
-	unsigned char carry:1; // bit 0
-	unsigned char zero:1;
-	unsigned char interrupt:1;
-	unsigned char decimal:1;
-	unsigned char brk:1; // "break" is a reserved word :(
-	unsigned char unused:1;
-	unsigned char overflow:1;
-	unsigned char sign:1;	// bit 7
+	bool carry:1; // bit 0
+	bool zero:1;
+	bool interrupt:1;
+	bool decimal:1;
+	bool brk:1; // "break" is a reserved word :(
+	bool unused:1;
+	bool overflow:1;
+	bool sign:1;	// bit 7
 };
 
 union StatusReg { // this means we can access the status register as a byte, or as individual bits.
diff --git a/6850.h b/6850.h
index 9a699fc..44f26c5 100644
--- a/6850.h
+++ b/6850.h
@@ -1,15 +1,17 @@
+#include <stdbool.h>
+
 #define CTRL_ADDR 0xA000
 #define DATA_ADDR 0xA001
 
 struct UartStatusBits{
-	unsigned char RDRF:1; // bit 0
-	unsigned char TDRE:1;
-	unsigned char DCD:1;
-	unsigned char CTS:1;
-	unsigned char FE:1;
-	unsigned char OVRN:1;
-	unsigned char PE:1;
-	unsigned char IRQ:1; // bit 7
+	bool RDRF:1; // bit 0
+	bool TDRE:1;
+	bool DCD:1;
+	bool CTS:1;
+	bool FE:1;
+	bool OVRN:1;
+	bool PE:1;
+	bool IRQ:1; // bit 7
 };
 
 union UartStatusReg {