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student-distrib/keyboard_handler.c

@@ -203,6 +203,8 @@ void keyboard_handler(void)
             			send_eoi(1);
             			return;
             		}
+
+            		
             		//edge case
             		if (scancode != 0x0E && key != '\n' && (key >=' ' && key <= '~') && key!='\0'){
             			if (key_buff_size[terminal_id] == BUFF_SIZE_LIMIT)			

student-distrib/systemcall.h

@@ -59,6 +59,9 @@ int32_t sigreturn(void);
 void construct_pcb_entries(pcb_t * pcb_pointer, int new_pid);
 void clear_file_descriptors();
 
+void play_sound (int freq_number, uint32_t duration);
+void alert();
+