diff options
Diffstat (limited to 'src/emu/machine/mb3773.c')
-rw-r--r-- | src/emu/machine/mb3773.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/emu/machine/mb3773.c b/src/emu/machine/mb3773.c new file mode 100644 index 00000000000..be0d5d7e6cd --- /dev/null +++ b/src/emu/machine/mb3773.c @@ -0,0 +1,39 @@ +/* + * mb3773 - Power Supply Monitor with Watch Dog Timer + * + * Todo: + * Calculate the timeout from parameters. + * + */ + +#include "driver.h" +#include "machine/mb3773.h" + +static emu_timer *watchdog_timer; +static UINT8 ck = 0; + +static TIMER_CALLBACK( watchdog_timeout ) +{ + mame_schedule_soft_reset(machine); +} + +static void reset_timer( void ) +{ + timer_adjust( watchdog_timer, ATTOTIME_IN_SEC( 5 ), 0, attotime_zero ); +} + +void mb3773_set_ck( UINT8 new_ck ) +{ + if( new_ck == 0 && ck != 0 ) + { + reset_timer(); + } + ck = new_ck; +} + +void mb3773_init( void ) +{ + watchdog_timer = timer_alloc( watchdog_timeout ); + reset_timer(); + state_save_register_global( ck ); +} |