Made an attempt to insert proper conversions to/from rotational speed. The Time class is now really turning into a full-on quotient. Might need refactoring.

Storage/Disk/DiskDrive.cpp

@@ -17,7 +17,11 @@ DiskDrive::DiskDrive(unsigned int clock_rate, unsigned int clock_rate_multiplier
 	_head_position(0),
 
 	TimedEventLoop(clock_rate * clock_rate_multiplier)
-{}
+{
+	_rotational_multiplier.length = 60;
+	_rotational_multiplier.clock_rate = revolutions_per_minute;
+	_rotational_multiplier.simplify();
+}
 
 void DiskDrive::set_expected_bit_length(Time bit_length)
 {
@@ -49,7 +53,9 @@ bool DiskDrive::get_is_track_zero()
 void DiskDrive::step(int direction)
 {
 	_head_position = std::max(_head_position + direction, 0);
-	_time_into_track += get_time_into_next_event();
+	Time extra_time = get_time_into_next_event() / _rotational_multiplier;
+	extra_time.simplify();
+	_time_into_track += extra_time;
 	set_track(_time_into_track);
 }
 
@@ -58,10 +64,10 @@ void DiskDrive::set_track(Time initial_offset)
 	_track = _disk->get_track_at_position((unsigned int)_head_position);
 	// TODO: probably a better implementation of the empty track?
 	Time offset;
-	if(_track)
+	if(_track && _time_into_track.length > 0)
 	{
-		Time time_found = _track->seek_to(_time_into_track);
-		offset = _time_into_track - time_found;
+		Time time_found = _track->seek_to(_time_into_track).simplify();
+		offset = (_time_into_track - time_found).simplify();
 		_time_into_track = time_found;
 	}
 	else
@@ -72,7 +78,7 @@ void DiskDrive::set_track(Time initial_offset)
 
 	reset_timer();
 	get_next_event();
-	reset_timer_to_offset(offset);
+	reset_timer_to_offset(offset * _rotational_multiplier);
 }
 
 void DiskDrive::run_for_cycles(int number_of_cycles)
@@ -104,11 +110,7 @@ void DiskDrive::get_next_event()
 
 	// divide interval, which is in terms of a rotation of the disk, by rotation speed, and
 	// convert it into revolutions per second
-	Time event_interval = _current_event.length;
-	event_interval.length *= 60;
-	event_interval.clock_rate *= _revolutions_per_minute;
-	event_interval.simplify();
-	set_next_event_time_interval(event_interval);
+	set_next_event_time_interval(_current_event.length * _rotational_multiplier);
 }
 
 void DiskDrive::process_next_event()

Storage/Disk/DiskDrive.hpp

@@ -93,6 +93,7 @@ class DiskDrive: public DigitalPhaseLockedLoop::Delegate, public TimedEventLoop
 		unsigned int _clock_rate;
 		unsigned int _clock_rate_multiplier;
 		unsigned int _revolutions_per_minute;
+		Time _rotational_multiplier;
 
 		std::shared_ptr<DigitalPhaseLockedLoop> _pll;
 		std::shared_ptr<Disk> _disk;

Storage/Disk/PCMTrack.cpp

@@ -86,7 +86,7 @@ Time PCMTrack::seek_to(Time time_since_index_hole)
 			unsigned int time_found = time_remaining - (time_remaining % bit_length);
 
 			// resolve that into the stateful bit count
-			_bit_pointer = time_remaining / bit_length;
+			_bit_pointer = 1 + (time_remaining / bit_length);
 
 			// update and return the time sought to
 			time_so_far.length += time_found;

Storage/Storage.hpp

@@ -25,11 +25,12 @@ struct Time {
 		Reduces this @c Time to its simplest form — eliminates all common factors from @c length
 		and @c clock_rate.
 	*/
-	inline void simplify()
+	inline Time &simplify()
 	{
 		unsigned int common_divisor = NumberTheory::greatest_common_divisor(length, clock_rate);
 		length /= common_divisor;
 		clock_rate /= common_divisor;
+		return *this;
 	}
 
 	/*!
@@ -40,12 +41,12 @@ struct Time {
 		return (float)length / (float)clock_rate;
 	}
 
-	inline bool operator<(Time other)
+	inline bool operator < (Time other)
 	{
 		return other.clock_rate * length < clock_rate * other.length;
 	}
 
-	inline Time operator+(Time other)
+	inline Time operator + (Time other)
 	{
 		Time result;
 		result.clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
@@ -53,7 +54,7 @@ struct Time {
 		return result;
 	}
 
-	inline Time &operator +=(Time other)
+	inline Time &operator += (Time other)
 	{
 		unsigned int combined_clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
 		length = length * (combined_clock_rate / clock_rate) + other.length * (combined_clock_rate / other.clock_rate);
@@ -61,7 +62,7 @@ struct Time {
 		return *this;
 	}
 
-	inline Time operator-(Time other)
+	inline Time operator - (Time other)
 	{
 		Time result;
 		result.clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
@@ -69,6 +70,44 @@ struct Time {
 		return result;
 	}
 
+	inline Time operator -= (Time other)
+	{
+		unsigned int combined_clock_rate = NumberTheory::least_common_multiple(clock_rate, other.clock_rate);
+		length = length * (combined_clock_rate / clock_rate) - other.length * (combined_clock_rate / other.clock_rate);
+		clock_rate = combined_clock_rate;
+		return *this;
+	}
+
+	inline Time operator * (Time other)
+	{
+		Time result;
+		result.clock_rate = clock_rate * other.clock_rate;
+		result.length = length * other.length;
+		return result;
+	}
+
+	inline Time &operator *= (Time other)
+	{
+		length *= other.length;
+		clock_rate *= other.clock_rate;
+		return *this;
+	}
+
+	inline Time operator / (Time other)
+	{
+		Time result;
+		result.clock_rate = clock_rate * other.length;
+		result.length = length * other.clock_rate;
+		return result;
+	}
+
+	inline Time &operator /= (Time other)
+	{
+		length *= other.clock_rate;
+		clock_rate *= other.length;
+		return *this;
+	}
+
 	inline void set_zero()
 	{
 		length = 0;