moved breakpoint to kmain to track interrupt problems

kernel.c

@@ -14,5 +14,8 @@ void kinit() {
 
 void kmain() {
 	kinit();
+	__asm__("xchg bx, bx");
+	__asm__("xor eax, eax");
+	__asm__("div al");
 	for(;;); // the most amazing loop
 }

tests.c

@@ -3,13 +3,6 @@
 #include "tests.h"
 #include "serial.h"
 
-void divide_by_zero() {
-	// here we can test the divide by zero without gcc noticing
-	int x = 0;
-	int y = 5;
-	int z = y/x;
-}
-
 void test_serial_write() {
 	char* serial1 = "0123456789abcdef0123456789abcdef";
 	serial_write(serial1, strlen(serial1));
@@ -24,6 +17,5 @@ void test_write() {
 void test_dispatcher() {
 	clear_fb();
 	test_write();
-	divide_by_zero();
 	test_write();
 }

tests.h

@@ -1,6 +1,5 @@
 #include "types.h"
 #include "stlio.h"
 
-void divide_by_zero();
 void test_write();
 void test_dispatcher();