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Fiddles further with the tachometer.

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Thomas Harte
2019-06-06 21:36:19 -04:00
parent 7591906777
commit e9d0676e75
3 changed files with 33 additions and 6 deletions
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Storage/Disk/Drive.cpp
+5 -2
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@@ -113,8 +113,11 @@ int Drive::get_head_count() {
}
bool Drive::get_tachometer() {
// First guess: the tachometer ticks once per rotation.
return get_rotation() > 0.5f;
// I have made a guess here that the tachometer is a symmetric square wave;
// if that is correct then around 60 beats per rotation appears to be correct
// to proceed beyond the speed checks I've so far uncovered.
const float ticks_per_rotation = 60.0f; // 56 was too low; 64 too high.
return int(get_rotation() * 2.0f * ticks_per_rotation) & 1;
}
float Drive::get_rotation() {