diff --git a/bit-ops.c b/bit-ops.c
index 90412d6..f21994d 100644
--- a/bit-ops.c
+++ b/bit-ops.c
@@ -1,6 +1,17 @@
 #include <stdio.h>
 
+void do_bit_ops() {
+	unsigned char PTAD = 0x10;
+	printf("PTAD = %#010x\n", PTAD);
+	PTAD |= 0x01;
+	printf("PTAD |= 0x01\t %#010x\n", PTAD);
+	PTAD &= 0xfe;
+	printf("PTAD &= 0xfe\t %#010x\n", PTAD);
+}
+
+
 int main() {
 	printf("*** bit-ops pls ***\n");
+	do_bit_ops();
 	return 0;
 }