/* motor on, active low */
void floppy_image_device::mon_w(int state)
{
if(mon == state)
return;
mon = state;
/* off -> on */
if (!mon && image)
{
revolution_start_time = machine().time();
ready_counter = 2;
index_resync();
}
/* on -> off */
else {
if(image_dirty)
commit_image();
revolution_start_time = attotime::never;
index_timer->adjust(attotime::zero);
if(!ready) {
ready = true;
if(!cur_ready_cb.isnull())
cur_ready_cb(this, ready);
}
}
}
void floppy_image_device::call_unload()
{
dskchg = 0;
if (image) {
if(image_dirty)
commit_image();
global_free(image);
image = 0;
}
wpt = 1; // disk sleeve is covering the sensor
if (!cur_wpt_cb.isnull())
cur_wpt_cb(this, wpt);
wpt = 0; // sensor is uncovered
if (!cur_wpt_cb.isnull())
cur_wpt_cb(this, wpt);
if (!cur_unload_cb.isnull())
cur_unload_cb(this);
if(!ready) {
ready = true;
if(!cur_ready_cb.isnull())
cur_ready_cb(this, ready);
}
}
void floppy_image_device::device_reset()
{
revolution_start_time = attotime::never;
revolution_count = 0;
mon = 1;
if(!ready) {
ready = true;
if(!cur_ready_cb.isnull())
cur_ready_cb(this, ready);
}
if(motor_always_on)
mon_w(0);
}
void floppy_image_device::call_unload()
{
dskchg = 0;
if (image) {
if(image_dirty)
commit_image();
global_free(image);
image = 0;
}
if (!cur_unload_cb.isnull())
cur_unload_cb(this);
if(!ready) {
ready = true;
if(!cur_ready_cb.isnull())
cur_ready_cb(this, ready);
}
}
/* index pulses at rpm/60 Hz, and stays high for ~2ms at 300rpm */
void floppy_image_device::index_resync()
{
if(revolution_start_time.is_never()) {
if(idx) {
idx = 0;
if (!cur_index_pulse_cb.isnull())
cur_index_pulse_cb(this, idx);
}
return;
}
attotime delta = machine().time() - revolution_start_time;
while(delta >= rev_time) {
delta -= rev_time;
revolution_start_time += rev_time;
revolution_count++;
}
int position = (delta*floppy_ratio_1).as_ticks(1000000000/1000);
int new_idx = position < 20000;
if(new_idx) {
attotime index_up_time = attotime::from_nsec((2000000*1000)/floppy_ratio_1);
index_timer->adjust(index_up_time - delta);
} else
index_timer->adjust(rev_time - delta);
if(new_idx != idx) {
idx = new_idx;
if(idx && ready) {
ready_counter--;
if(!ready_counter) {
ready = false;
if(!cur_ready_cb.isnull())
cur_ready_cb(this, ready);
}
}
if (!cur_index_pulse_cb.isnull())
cur_index_pulse_cb(this, idx);
}
}
