added proper VGA graphics

src/kernel/stdlib.c

@@ -22,4 +22,9 @@ uint8_t uitoa32(uint32_t x, char* str) {
     str[i] = 0;
     strrev32(str);
     return i;
+}
+void memcopy(void* dest, void* src, size_t size) {
+    for (size_t i=0;i<size;i++) {
+        ((uint8_t*)dest)[i] = ((uint8_t*)src)[i];
+    }
 }