Add printf, gdb support, fix gdt
diff --git a/src/interrupts.c b/src/interrupts.c
index 615f367..c8ded7c 100644
--- a/src/interrupts.c
+++ b/src/interrupts.c
@@ -11,5 +11,7 @@
 
 void isr_handler(struct registers regs)
 {
-	vga_write("Interrupt triggered\n");
+	vga_write("Interrupt triggered! ");
+	vga_putx(regs.interrupt_number);
+	vga_write("\n");
 }