Add: ISR now handling common exceptions

kmain.c

@@ -2,12 +2,14 @@
 #include "serial.h"
 #include "gdt.h"
 #include "idt.h"
+#include "system.h"
 
 int kmain(int retvalue)
 {
   
   gdt_install();
   idt_install();
+  isr_install();
 
   // serial testing
 
@@ -16,11 +18,15 @@ int kmain(int retvalue)
   log("serial connection established", 3);
   log("initialized GDT entries", 2);
   log("kernel started", 2);
+  log("initialized IDT", 2);
+  log("initialized ISRs", 3);
 
   clear();
 
   // printf testing
 
+  // TODO: Framebuffer upgrade: color output
+
   int age = 34;
   int problems = 124;
   char* name = "xamidev"; 
@@ -35,6 +41,10 @@ int kmain(int retvalue)
   printf("such hex %x %X\n", 0xcafe, 0xdeadbeef);
   
   printf("such pointer %p\n", (void*)0xcafe1234);
+ 
+  // Div by zero exception
   
+  printf("Lalala, what a beautiful day! %d", 4/0);
+
   return retvalue;
 }