diff --git a/bit-ops.c b/bit-ops.c
index f21994d..d671d6e 100644
--- a/bit-ops.c
+++ b/bit-ops.c
@@ -2,11 +2,24 @@
 
 void do_bit_ops() {
 	unsigned char PTAD = 0x10;
-	printf("PTAD = %#010x\n", PTAD);
+	printf("PTAD = %#x\n* OR\n", PTAD);
 	PTAD |= 0x01;
-	printf("PTAD |= 0x01\t %#010x\n", PTAD);
+	printf("PTAD |= 0x01 --> %#010x (%#x)\n", PTAD, PTAD);
+
+	printf("----------\n* AND\n");
+	printf("PTAD = %#x\n", PTAD=0x1f);
 	PTAD &= 0xfe;
-	printf("PTAD &= 0xfe\t %#010x\n", PTAD);
+	printf("PTAD &= 0xfe --> %#010x (%#x)\n", PTAD, PTAD);
+
+	printf("----------\n* NOT\n");
+	printf("PTAD = %#x\n", PTAD=0x10);
+	PTAD = ~PTAD;
+	printf("PTAD = ~PTAD --> %#010x (%#x)\n", PTAD, PTAD);
+
+	printf("----------\n* XOR\n");
+	printf("PTAD = %#x\n", PTAD=0x10);
+	PTAD ^= 0xfe;
+	printf("PTAD ^= 0xfe --> %#010x (%#x)\n", PTAD, PTAD);
 }