check cga pos bounds and debug print

arch/textwindow.cc

@@ -14,12 +14,23 @@ TextWindow::TextWindow(unsigned from_col, unsigned to_col, unsigned from_row,
   setPos(0,0);
 }
 
+extern unsigned int testx, testy;
 void TextWindow::setPos(unsigned rel_x, unsigned rel_y) {
+    unsigned abs_x = from_col + rel_x;
+    unsigned abs_y = from_row + rel_y;
+
+    if(abs_x >= CGA::COLUMNS)
+        return;
+    if(abs_y >= CGA::ROWS)
+        return;
+
     if(use_cursor){
-        CGA::setCursor(from_col + rel_x, from_row + rel_y);
+        testx = abs_x;
+        testy = abs_y;
+        CGA::setCursor(abs_x, abs_y);
     }else{
-        pos_x = from_col + rel_x;
-        pos_y = from_row + rel_y;
+        pos_x = abs_x;
+        pos_y = abs_y;
     }
 }
 

main.cc

@@ -63,9 +63,13 @@ OutputStream* copyout[Core::MAX]{
     &dout[7]
 };
 
+unsigned int testx, testy;
+
 // Main function
 // (the bootstrap processor starts here)}
 extern "C" int main() {
+  CGA::setCursor(0, 0);
+
   unsigned int numCPUs = Core::count();
   DBG_VERBOSE << "Number of CPUs: " << numCPUs << endl;
 
@@ -102,8 +106,12 @@ extern "C" int main() {
 
   PS2Controller::drainBuffer();
 
-  Application{}.action();
+  DBG << "Main CPU " << static_cast<int>(LAPIC::getID()) << endl << flush;
+
+  //Application{}.action();
   while (true){
+      DBG << "pos: " << testx << ", " << testy << endl << flush;
+      Core::pause();
   }
 
   return 0;