#include #include #include #include size_t timer_ticks = 0; size_t flag = 0; void timer_handler(struct int_frame* r) { gdb_end(); timer_ticks++; if(timer_ticks % 18 == 0) { if(++flag % 2 == 0) { serial_print(0x3F8, "Tick."); } else { serial_print(0x3F8, "Tock."); } } if(timer_ticks > 18) timer_ticks = 0; } void timer_install() { irq_install_handler(0, &timer_handler); }