void display_reset() {
/* lower the reset line for a while */
bclr((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);
delay(DISPLAY_DELAY);
bset((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);
void display_reset() {
/* lower the reset line for a while */
bclr((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);
delay(DISPLAY_DELAY);
bset((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);