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Aviator on the BBC Micro

Workspaces: Main variable workspace

Name: Main variable workspace [Show more] Type: Workspace Address: &0400 to &07FF and &0900 to &0CFF Category: Workspaces Summary: The main block of game variables
Context: See this workspace in context in the source code References: No direct references to this workspace in this source file
ORG &0400 .pointStatus SKIP 216 \ Each point's status byte \ \ * Bit 0: \ \ * 0 = we have not yet projected this point \ \ * 1 = we have already projected this point \ \ * Bit 2: \ \ * 0 = yPoint is positive \ \ * 1 = yPoint is negative \ \ * Bit 3: \ \ * 0 = xPoint is positive \ \ * 1 = xPoint is negative \ \ * Bit 4: \ \ * 0 = |yPoint| * 2 < |zPoint| \ \ * 1 = |yPoint| * 2 >= |zPoint| \ \ * Bit 5: \ \ * 0 = |xPoint| < |zPoint| \ \ * 1 = |xPoint| >= |zPoint| \ \ * Bit 7: \ \ * 0 = the point's coordinates and visibility have \ not been calculated \ \ * 1 = the point's coordinates and visibility have \ already been calculated \ \ Zeroed in ResetVariables .objectStatus SKIP 40 \ Each object's status byte \ \ * Bit 6: \ \ * 0 = the object's coordinates and visibility have \ not been calculated in this iteration of the \ main loop \ \ * 1 = the object's coordinates and visibility have \ already been calculated in this iteration of \ the main loop \ \ * Bit 7: \ \ * 0 = the object is not visible \ \ * 1 = the object is visible \ \ Zeroed in ResetVariables and in part 2 of the main \ loop .linesToShow SKIP 200 \ A list of line IDs for lines that are visible .relatedPoints SKIP 56 \ Contains a list, from relatedPoints+1 onwards, with \ the list size in relatedPoints \ \ Point IDs get added in part 3 of ProcessLine when \ those points are part of an object - only points \ that we haven't already processed are added \ \ The maximum size of the list is 49 \ \ Zeroed in ResetVariables .linesToHide SKIP 256 \ A list of line IDs for lines that are not visible .zPointLo SKIP 252 \ The low byte of the z-coordinate for the point with \ ID X is at zPointLo,X \ \ Stored as a 16-bit value (zPointHi zPointLo) .zLinearLo SKIP 1 \ Low byte of point 252 (z-coordinate) \ \ Point 252 is used to store the sum of all the forces \ on the plane when calculating the flight model \ \ Stored as a 16-bit value (zLinearHi zLinearLo) .zGravityLo SKIP 1 \ Low byte of point 253 (z-coordinate) \ \ Point 253 is used to store the gravity vector when \ calculating the flight model \ \ Stored as a 16-bit value (zGravityHi zGravityLo) .zTempPoint1Lo SKIP 1 \ Low byte of point 254 (z-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (zTempPoint1Hi zTempPoint1Lo) .zTempPoint2Lo SKIP 1 \ Low byte of point 255 (z-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (zTempPoint2Hi zTempPoint2Lo) ORG &0900 .xPointLo SKIP 252 \ The low byte of the x-coordinate for the point with \ ID X is at xPointLo,X \ \ Stored as a 16-bit value (xPointHi xPointLo) .xLinearLo SKIP 1 \ Low byte of point 252 (x-coordinate) \ \ Point 252 is used to store the sum of all the forces \ on the plane when calculating the flight model \ \ Stored as a 16-bit value (xLinearHi xLinearLo) .xGravityLo SKIP 1 \ Low byte of point 253 (x-coordinate) \ \ Point 253 is used to store the gravity vector when \ calculating the flight model \ \ Stored as a 16-bit value (xGravityHi xGravityLo) .xTempPoint1Lo SKIP 1 \ Low byte of point 254 (x-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (xTempPoint1Hi xTempPoint1Lo) .xTempPoint2Lo SKIP 1 \ Low byte of point 255 (x-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (xTempPoint2Hi xTempPoint2Lo) .yPointLo SKIP 252 \ The low byte of the y-coordinate for the point with \ ID X is at yPointLo,X \ \ Stored as a 16-bit value (yPointHi yPointLo) .yLinearLo SKIP 1 \ Low byte of point 252 (y-coordinate) \ \ Point 252 is used to store the sum of all the forces \ on the plane when calculating the flight model \ \ Stored as a 16-bit value (yLinearHi yLinearLo) .yGravityLo SKIP 1 \ Low byte of point 253 (y-coordinate) \ \ Point 253 is used to store the gravity vector when \ calculating the flight model \ \ Stored as a 16-bit value (yGravityHi yGravityLo) .yTempPoint1Lo SKIP 1 \ Low byte of point 254 (y-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (yTempPoint1Hi yTempPoint1Lo) .yTempPoint2Lo SKIP 1 \ Low byte of point 255 (z-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (yTempPoint2Hi yTempPoint2Lo) .yPointHi SKIP 252 \ The high byte of the y-coordinate for the point with \ ID X is at yPointHi,X \ \ Stored as a 16-bit value (yPointHi yPointLo) .yLinearHi SKIP 1 \ High byte of point 252 (y-coordinate) \ \ Point 252 is used to store the sum of all the forces \ on the plane when calculating the flight model \ \ Stored as a 16-bit value (yLinearHi yLinearLo) .yGravityHi SKIP 1 \ High byte of point 253 (y-coordinate) \ \ Point 253 is used to store the gravity vector when \ calculating the flight model \ \ Stored as a 16-bit value (yGravityHi yGravityLo) .yTempPoint1Hi SKIP 1 \ High byte of point 254 (y-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (yTempPoint1Hi yTempPoint1Lo) .yTempPoint2Hi SKIP 1 \ High byte of point 255 (y-coordinate) \ \ Used as temporary point storage when rotating points \ in space \ \ Stored as a 16-bit value (yTempPoint2Hi yTempPoint2Lo) .xTurnHi SKIP 1 \ Turn rate around the x-axis (high byte) \ \ Stored as a 24-bit value (xTurnTop xTurnHi xTurnLo) .yTurnHi SKIP 1 \ Turn rate around the y-axis (high byte) \ \ Stored as 35 * the turn rate in 180 degrees per minute \ \ Shown on indicator 5 \ \ Stored as a 24-bit value (yTurnTop yTurnHi yTurnLo) .zTurnHi SKIP 1 \ Turn rate around the z-axis (high byte) \ \ Stored as a 24-bit value (zTurnTop zTurnHi zTurnLo) .xVelocityPLo SKIP 1 \ Plane velocity along the x-axis from the perspective \ of the pilot (low byte) \ \ Stored as a 16-bit value (xVelocityPHi xVelocityPLo) .yVelocityPLo SKIP 1 \ Plane velocity along the y-axis from the perspective \ of the pilot (low byte) \ \ Stored as a 16-bit value (yVelocityPHi yVelocityPLo) .zVelocityPLo SKIP 1 \ Plane velocity along the a-axis from the perspective \ of the pilot (low byte) \ \ This is the same as the forward airspeed \ \ 100 mph is stored as 9.25 * 256 = 2368 \ \ so 50 mph = 0.5 * 2368 = 1184 = (4 160) \ so 70 mph = 0.7 * 2368 = 1658 = (6 122) \ so 100 mph = 1 * 2368 = 2368 = (9 64) \ so 400 mph = 4 * 2368 = 9472 = (37 00) \ \ Shown on indicator 1 \ \ Stored as a 16-bit value (zVelocityPHi zVelocityPLo) .xTemp3Lo SKIP 1 \ The low byte of the xTemp3 temporary variable \ \ Stored as a 16-bit value (xTemp3Hi xTemp3Lo) .yTemp3Lo SKIP 1 \ The low byte of the yTemp3 temporary variable \ \ Stored as a 16-bit value (yTemp3Hi yTemp3Lo) .zTemp3Lo SKIP 1 \ The low byte of the zTemp3 temporary variable \ \ Stored as a 16-bit value (zTemp3Hi zTemp3Lo) .xPlaneBot SKIP 1 \ The bottom byte of the plane's coordinate (x-axis) \ \ Stored as a 32-bit value (xPlaneTop xPlaneHi xPlaneLo \ xPlaneBot) .yPlaneBot SKIP 1 \ The bottom byte of the plane's coordinate (y-axis) \ \ Stored as a 32-bit value (yPlaneTop yPlaneHi yPlaneLo \ yPlaneBot) .zPlaneBot SKIP 1 \ The bottom byte of the plane's coordinate (z-axis) \ \ Stored as a 32-bit value (zPlaneTop zPlaneHi zPlaneLo \ zPlaneBot) .elevatorPosition SKIP 1 \ Elevator position (pitch) \ \ The controls that affect rotation around the x-axis \ \ Shown on indicator 8 or 10 as the joystick y-position .rudderPosition SKIP 1 \ Rudder position (yaw) \ \ The controls that affect rotation around the y-axis \ \ Shown on indicator 9 .aileronPosition SKIP 1 \ Aileron position (roll) \ \ The controls that affect rotation around the z-axis \ \ Shown on indicator 8 or 10 as the joystick x-position .thrustLo SKIP 1 \ Thrust (low byte) \ \ Thrust is in the range 0 to 1280 \ \ Shown on indicator 11 \ \ Stored as a 16-bit value (thrustHi thrustLo) .xTurnTop SKIP 1 \ Turn rate around the x-axis (top byte) \ \ Stored as a 24-bit value (xTurnTop xTurnHi xTurnLo) .yTurnTop SKIP 1 \ Turn rate around the y-axis (top byte) \ \ Stored as 35 * the turn rate in 180 degrees per minute \ \ Shown on indicator 5 \ \ Stored as a 24-bit value (yTurnTop yTurnHi yTurnLo) .zTurnTop SKIP 1 \ Turn rate around the z-axis (top byte) \ \ Stored as a 24-bit value (zTurnTop zTurnHi zTurnLo) .xVelocityPHi SKIP 1 \ Plane velocity along the x-axis from the perspective \ of the pilot (high byte) \ \ Stored as a 16-bit value (xVelocityPHi xVelocityPLo) .yVelocityPHi SKIP 1 \ Plane velocity along the y-axis from the perspective \ of the pilot (high byte) \ \ Stored as a 16-bit value (yVelocityPHi yVelocityPLo) .zVelocityPHi SKIP 1 \ Plane velocity along the z-axis from the perspective \ of the pilot (high byte) \ \ This is the same as the forward airspeed \ \ 100 mph is stored as 9.25 * 256 = 2368 \ \ so 50 mph = 0.5 * 2368 = 1184 = (4 160) \ so 70 mph = 0.7 * 2368 = 1658 = (6 122) \ so 100 mph = 1 * 2368 = 2368 = (9 64) \ so 400 mph = 4 * 2368 = 9472 = (37 00) \ \ Shown on indicator 1 \ \ Stored as a 16-bit value (zVelocityPHi zVelocityPLo) .xTemp3Hi SKIP 1 \ The high byte of the xTemp3 temporary variable \ \ Stored as a 16-bit value (xTemp3Hi xTemp3Lo) .yTemp3Hi SKIP 1 \ The high byte of the yTemp3 temporary variable \ \ Stored as a 16-bit value (yTemp3Hi yTemp3Lo) .zTemp3Hi SKIP 1 \ The high byte of the zTemp3 temporary variable \ \ Stored as a 16-bit value (zTemp3Hi zTemp3Lo) .xTurnLo SKIP 1 \ Turn rate around the x-axis (low byte) \ \ Stored as a 24-bit value (xTurnTop xTurnHi xTurnLo) .yTurnLo SKIP 1 \ Turn rate around the y-axis (low byte) \ \ Stored as a 24-bit value (yTurnTop yTurnHi yTurnLo) .zTurnLo SKIP 1 \ Turn rate around the z-axis (low byte) \ \ Stored as a 24-bit value (zTurnTop zTurnHi zTurnLo) SKIP 3 \ These bytes appear to be unused .thrustHi SKIP 1 \ Thrust (high byte) \ \ Thrust is in the range 0 to 1280 \ \ Shown on indicator 11 \ \ Stored as a 16-bit value (thrustHi thrustLo) .xMomentsScLo SKIP 1 \ Scaled angular force due to forces on the plane in \ the x-axis (low byte) \ \ Stored as a 24-bit value (xMomentsScTop xMomentsScHi \ xMomentsScLo) .yMomentsScLo SKIP 1 \ Scaled angular force due to forces on the plane in \ the y-axis (low byte) \ \ Stored as a 24-bit value (yMomentsScTop yMomentsScHi \ yMomentsScLo) .zMomentsScLo SKIP 1 \ Scaled angular force due to forces on the plane in \ the z-axis (low byte) \ \ Stored as a 24-bit value (zMomentsScTop zMomentsScHi \ zMomentsScLo) .xLiftDragScLo SKIP 1 \ Scaled linear force due to lift in the x-axis (low \ byte) \ \ Stored as a 24-bit value (xLiftDragScTop xLiftDragScHi \ xLiftDragScLo) .yLiftDragScLo SKIP 1 \ Scaled linear force due to side forces in the y-axis \ (low byte) \ \ Stored as a 24-bit value (yLiftDragScTop yLiftDragScHi \ yLiftDragScLo) .zLiftDragScLo SKIP 1 \ Scaled linear force due to drag in the z-axis (low \ byte) \ \ Stored as a 24-bit value (zLiftDragScTop zLiftDragScHi \ zLiftDragScLo) .zSlipMomentScLo SKIP 1 \ Scaled angular force in the z-axis due to aircraft \ slip (low byte) \ \ Stored as a 24-bit value (zSlipMomentScTop \ zSlipMomentScHi zSlipMomentScLo) .yFlapsLiftScLo SKIP 1 \ Scaled linear force in the y-axis due to lift from the \ flaps (low byte) \ \ Stored as a 24-bit value (yFlapsLiftScTop \ yFlapsLiftScHi yFlapsLiftScLo) SKIP 2 \ These bytes appear to be unused .xControlsScLo SKIP 1 \ Scaled angular force due to the plane's controls in \ the x-axis (low byte) \ \ Stored as a 24-bit value (xControlsScTop xControlsScHi \ xControlsScLo) .yControlsScLo SKIP 1 \ Scaled angular force due to the plane's controls in \ the y-axis (low byte) \ \ Stored as a 24-bit value (yControlsScTop yControlsScHi \ yControlsScLo) .zControlsScLo SKIP 1 \ Scaled angular force due to the plane's controls in \ the z-axis (low byte) \ \ Stored as a 24-bit value (zControlsScTop zControlsScHi \ zControlsScLo) .axisKeyUsage SKIP 3 \ The following locations are updated when keys are \ pressed in UpdateFlightModel: \ \ * axisKeyUsage = elevator \ \ * axisKeyUsage+1 = rudder \ \ * axisKeyUsage+2 = aileron \ \ In each case, the value is updated by adding the \ relevant keyLoggerLo value, which is 1 in each case, \ so these count up by 1 every time a relevant axis \ control key is pressed (in any direction), so they \ measure "axis control key usage" .dxTurnLo SKIP 1 \ Rate of change of the plane's turn rate in the x-axis \ (low byte) \ \ Stored as a 24-bit value (dxTurnTop dxTurnHi dxTurnLo) .dyTurnLo SKIP 1 \ Rate of change of the plane's turn rate in the y-axis \ (low byte) \ \ Stored as a 24-bit value (dyTurnTop dyTurnHi dyTurnLo) .dzTurnLo SKIP 1 \ Rate of change of the plane's turn rate in the z-axis \ (low byte) \ \ Stored as a 24-bit value (dzTurnTop dzTurnHi dzTurnLo) SKIP 13 \ These bytes appear to be unused .xMomentsLo SKIP 1 \ Angular force due to airflow over the plane in the \ x-axis (low byte) \ \ Stored as a 16-bit value (xMomentsHi xMomentsLo) .yMomentsLo SKIP 1 \ Angular force due to airflow over the plane in the \ y-axis (low byte) \ \ Stored as a 16-bit value (yMomentsHi yMomentsLo) .zMomentsLo SKIP 1 \ Angular force due to airflow over the plane in the \ z-axis (low byte) \ \ Stored as a 16-bit value (zMomentsHi zMomentsLo) .xLiftDragLo SKIP 1 \ Linear force due to lift in the x-axis (low byte) \ \ Stored as a 16-bit value (xLiftDragHi xLiftDragLo) .yLiftDragLo SKIP 1 \ Linear force due to side forces in the y-axis (low \ byte) \ \ Stored as a 16-bit value (yLiftDragHi yLiftDragLo) .zLiftDragLo SKIP 1 \ Linear force due to drag in the z-axis (low byte) \ \ Stored as a 16-bit value (zLiftDragHi zLiftDragLo) .zSlipMomentLo SKIP 1 \ Angular force in the z-axis due to aircraft slip (low \ byte) \ \ Stored as a 16-bit value (zSlipMomentHi zSlipMomentLo) .yFlapsLiftLo SKIP 1 \ Linear force in the y-axis due to lift from the flaps \ (low byte) \ \ Stored as a 16-bit value (yFlapsLiftHi yFlapsLiftLo) SKIP 2 \ These bytes appear to be unused .xControlsLo SKIP 1 \ Angular force due to the plane's controls in the \ x-axis (low byte) \ \ Stored as a 16-bit value (xControlsHi xControlsLo) .yControlsLo SKIP 1 \ Angular force due to the plane's controls in the \ y-axis (low byte) \ \ Stored as a 16-bit value (yControlsHi yControlsLo) .zControlsLo SKIP 1 \ Angular force due to the plane's controls in the \ z-axis (low byte) \ \ Stored as a 16-bit value (zControlsHi zControlsLo) SKIP 3 \ These bytes appear to be unused .xMomentsHi SKIP 1 \ Angular force due to airflow over the plane in the \ x-axis (high byte) \ \ Stored as a 16-bit value (xMomentsHi xMomentsLo) .yMomentsHi SKIP 1 \ Angular force due to airflow over the plane in the \ y-axis (high byte) \ \ Stored as a 16-bit value (yMomentsHi yMomentsLo) .zMomentsHi SKIP 1 \ Angular force due to airflow over the plane in the \ z-axis (high byte) \ \ Stored as a 16-bit value (zMomentsHi zMomentsLo) .xLiftDragHi SKIP 1 \ Linear force due to lift in the x-axis (high byte) \ \ Stored as a 16-bit value (xLiftDragHi xLiftDragLo) .yLiftDragHi SKIP 1 \ Linear force due to side forces in the y-axis (high \ byte) \ \ Stored as a 16-bit value (yLiftDragHi yLiftDragLo) .zLiftDragHi SKIP 1 \ Linear force due to drag in the z-axis (high byte) \ \ Stored as a 16-bit value (zLiftDragHi zLiftDragLo) .zSlipMomentHi SKIP 1 \ Angular force in the z-axis due to aircraft slip (high \ byte) \ \ Stored as a 16-bit value (zSlipMomentHi zSlipMomentLo) .yFlapsLiftHi SKIP 1 \ Linear force in the y-axis due to lift from the flaps \ (high byte) \ \ Stored as a 16-bit value (yFlapsLiftHi yFlapsLiftLo) SKIP 2 \ These bytes appear to be unused .xControlsHi SKIP 1 \ Angular force due to the plane's controls in the \ x-axis (high byte) \ \ Stored as a 16-bit value (xControlsHi xControlsLo) .yControlsHi SKIP 1 \ Angular force due to the plane's controls in the \ y-axis (high byte) \ \ Stored as a 16-bit value (yControlsHi yControlsLo) .zControlsHi SKIP 1 \ Angular force due to the plane's controls in the \ z-axis (high byte) \ \ Stored as a 16-bit value (zControlsHi zControlsLo) SKIP 3 \ These bytes appear to be unused .xMomentsScHi SKIP 1 \ Scaled angular force due to forces on the plane in \ the x-axis (high byte) \ \ Stored as a 24-bit value (xMomentsScTop xMomentsScHi \ xMomentsScLo) .yMomentsScHi SKIP 1 \ Scaled angular force due to forces on the plane in \ the y-axis (high byte) \ \ Stored as a 24-bit value (yMomentsScTop yMomentsScHi \ yMomentsScLo) .zMomentsScHi SKIP 1 \ Scaled angular force due to forces on the plane in \ the z-axis (high byte) \ \ Stored as a 24-bit value (zMomentsScTop zMomentsScHi \ zMomentsScLo) .xLiftDragScHi SKIP 1 \ Scaled linear force due to lift in the x-axis (high \ byte) \ \ Stored as a 24-bit value (xLiftDragScTop xLiftDragScHi \ xLiftDragScLo) .yLiftDragScHi SKIP 1 \ Scaled linear force due to side forces in the y-axis \ (high byte) \ \ Stored as a 24-bit value (yLiftDragScTop yLiftDragScHi \ yLiftDragScLo) .zLiftDragScHi SKIP 1 \ Scaled linear force due to drag in the z-axis (high \ byte) \ \ Stored as a 24-bit value (zLiftDragScTop zLiftDragScHi \ zLiftDragScLo) .zSlipMomentScHi SKIP 1 \ Scaled angular force in the z-axis due to aircraft \ slip (high byte) \ \ Stored as a 24-bit value (zSlipMomentScTop \ zSlipMomentScHi zSlipMomentScLo) .yFlapsLiftScHi SKIP 1 \ Scaled linear force in the y-axis due to lift from the \ flaps (high byte) \ \ Stored as a 24-bit value (yFlapsLiftScTop \ yFlapsLiftScHi yFlapsLiftScLo) SKIP 2 \ These bytes appear to be unused .xControlsScHi SKIP 1 \ Scaled angular force due to the plane's controls in \ the x-axis (high byte) \ \ Stored as a 24-bit value (xControlsScTop xControlsScHi \ xControlsScLo) .yControlsScHi SKIP 1 \ Scaled angular force due to the plane's controls in \ the y-axis (high byte) \ \ Stored as a 24-bit value (yControlsScTop yControlsScHi \ yControlsScLo) .zControlsScHi SKIP 1 \ Scaled angular force due to the plane's controls in \ the z-axis (high byte) \ \ Stored as a 24-bit value (zControlsScTop zControlsScHi \ zControlsScLo) .xPlaneTop SKIP 1 \ The top byte of the plane's location, which is the \ byte above the high byte in xPlaneHi \ \ Stored as a 32-bit value (xPlaneTop xPlaneHi xPlaneLo \ xPlaneBot) .yPlaneTop SKIP 1 \ The top byte of the plane's location, which is the \ byte above the high byte in yPlaneHi \ \ Stored as a 32-bit value (yPlaneTop yPlaneHi yPlaneLo \ yPlaneBot) .zPlaneTop SKIP 1 \ The top byte of the plane's location, which is the \ byte above the high byte in zPlaneHi \ \ Stored as a 32-bit value (zPlaneTop zPlaneHi zPlaneLo \ zPlaneBot) .xMomentsScTop SKIP 1 \ Scaled angular force due to forces on the plane in \ the x-axis (top byte) \ \ Stored as a 24-bit value (xMomentsScTop xMomentsScHi \ xMomentsScLo) .yMomentsScTop SKIP 1 \ Scaled angular force due to forces on the plane in \ the y-axis (top byte) \ \ Stored as a 24-bit value (yMomentsScTop yMomentsScHi \ yMomentsScLo) .zMomentsScTop SKIP 1 \ Scaled angular force due to forces on the plane in \ the z-axis (top byte) \ \ Stored as a 24-bit value (zMomentsScTop zMomentsScHi \ zMomentsScLo) .xLiftDragScTop SKIP 1 \ Scaled linear force due to lift in the x-axis (top \ byte) \ \ Stored as a 24-bit value (xLiftDragScTop xLiftDragScHi \ xLiftDragScLo) .yLiftDragScTop SKIP 1 \ Scaled linear force due to side forces in the y-axis \ (top byte) \ \ Stored as a 24-bit value (yLiftDragScTop yLiftDragScHi \ yLiftDragScLo) .zLiftDragScTop SKIP 1 \ Scaled linear force due to drag in the z-axis (top \ byte) \ \ Stored as a 24-bit value (zLiftDragScTop zLiftDragScHi \ zLiftDragScLo) .zSlipMomentScTop SKIP 1 \ Scaled angular force in the z-axis due to aircraft \ slip (top byte) \ \ Stored as a 24-bit value (zSlipMomentScTop \ zSlipMomentScHi zSlipMomentScLo) .yFlapsLiftScTop SKIP 1 \ Scaled linear force in the y-axis due to lift from the \ flaps (top byte) \ \ Stored as a 24-bit value (yFlapsLiftScTop \ yFlapsLiftScHi yFlapsLiftScLo) SKIP 2 \ These bytes appear to be unused .xControlsScTop SKIP 1 \ Scaled angular force due to the plane's controls in \ the x-axis (top byte) \ \ Stored as a 24-bit value (xControlsScTop xControlsScHi \ xControlsScLo) .yControlsScTop SKIP 1 \ Scaled angular force due to the plane's controls in \ the y-axis (top byte) \ \ Stored as a 24-bit value (yControlsScTop yControlsScHi \ yControlsScLo) .zControlsScTop SKIP 1 \ Scaled angular force due to the plane's controls in \ the z-axis (top byte) \ \ Stored as a 24-bit value (zControlsScTop zControlsScHi \ zControlsScLo) SKIP 3 \ These bytes appear to be unused .dxTurnHi SKIP 1 \ Rate of change of the plane's turn rate in the x-axis \ (high byte) \ \ Stored as a 24-bit value (dxTurnTop dxTurnHi dxTurnLo) .dyTurnHi SKIP 1 \ Rate of change of the plane's rate turn in the y-axis \ (high byte) \ \ Stored as a 24-bit value (dyTurnTop dyTurnHi dyTurnLo) .dzTurnHi SKIP 1 \ Rate of change of the plane's rate turn in the z-axis \ (high byte) \ \ Stored as a 24-bit value (dzTurnTop dzTurnHi dzTurnLo) .dxVelocityLo SKIP 1 \ Rate of change of the plane's velocity in the x-axis \ (low byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dyVelocityLo SKIP 1 \ Rate of change of the plane's velocity in the y-axis \ (low byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dzVelocityLo SKIP 1 \ Rate of change of the plane's velocity in the z-axis \ (low byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dxRotationLo SKIP 1 \ Rate of change of the plane's rotation in the x-axis \ (low byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dyRotationLo SKIP 1 \ Rate of change of the plane's rotation in the y-axis \ (low byte) \ \ Stored as a 16-bit value (dyVelocityHi dyVelocityLo) .dzRotationLo SKIP 1 \ Rate of change of the plane's rotation in the z-axis \ (low byte) \ \ Stored as a 16-bit value (dzVelocityHi dzVelocityLo) .xVelocityHi SKIP 1 \ Plane velocity in the x-axis from the perspective \ of the outside world (high byte) \ \ Stored as a 24-bit value (xVelocityTop xVelocityHi \ xVelocityLo) .yVelocityHi SKIP 1 \ Plane velocity in the y-axis from the perspective \ of the outside world (high byte) \ \ This is the same as the vertical speed, and is from \ the perspective of the world outside the plane, so \ yVelocity is the vertical speed of the plane, \ irrespective of how the plane is orientated \ \ For the plane's speed from the point of view of the \ plane, see (xVelocityP yVelocityP zVelocityP) \ \ Stored as 128/425 * vertical speed in feet per minute, \ so: \ \ 1000 feet/minute is stored as 128/425 * 1000 = 301 \ \ 4000 feet/minute is stored as 128/425 * 4000 = 1205 \ \ Shown on indicator 4 \ \ Stored as a 24-bit value (yVelocityTop yVelocityHi \ yVelocityLo) .zVelocityHi SKIP 1 \ Plane velocity in the z-axis from the perspective \ of the outside world (high byte) \ \ Stored as a 24-bit value (zVelocityTop zVelocityHi \ zVelocityLo) .xVelocityLo SKIP 1 \ Plane velocity in the x-axis from the perspective \ of the outside world (low byte) \ \ Stored as a 24-bit value (xVelocityTop xVelocityHi \ xVelocityLo) .yVelocityLo SKIP 1 \ Plane velocity in the y-axis from the perspective \ of the outside world (low byte) \ \ This is the same as the vertical speed, and is from \ the perspective of the world outside the plane, so \ yVelocity is the vertical speed of the plane, \ irrespective of how the plane is orientated \ \ For the plane's speed from the point of view of the \ plane, see (xVelocityP yVelocityP zVelocityP) \ \ Stored as 128/425 * vertical speed in feet per minute, \ so: \ \ 1000 feet/minute is stored as 128/425 * 1000 = 301 \ \ 4000 feet/minute is stored as 128/425 * 4000 = 1205 \ \ Shown on indicator 4 \ \ Stored as a 24-bit value (yVelocityTop yVelocityHi \ yVelocityLo) .zVelocityLo SKIP 1 \ Plane velocity in the z-axis from the perspective \ of the outside world (low byte) \ \ Stored as a 24-bit value (zVelocityTop zVelocityHi \ zVelocityLo) SKIP 1 \ This byte appears to be unused .dxTurnTop SKIP 1 \ Rate of change of the plane's turn rate in the x-axis \ (top byte) \ \ Stored as a 24-bit value (dxTurnTop dxTurnHi dxTurnLo) .dyTurnTop SKIP 1 \ Rate of change of the plane's turn rate in the y-axis \ (top byte) \ \ Stored as a 24-bit value (dyTurnTop dyTurnHi dyTurnLo) .dzTurnTop SKIP 1 \ Rate of change of the plane's turn rate in the z-axis \ (top byte) \ \ Stored as a 24-bit value (dzTurnTop dzTurnHi dzTurnLo) .dxVelocityHi SKIP 1 \ Rate of change of the plane's velocity in the x-axis \ (high byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dyVelocityHi SKIP 1 \ Rate of change of the plane's velocity in the y-axis \ (high byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dzVelocityHi SKIP 1 \ Rate of change of the plane's velocity in the z-axis \ (high byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dxRotationHi SKIP 1 \ Rate of change of the plane's rotation in the x-axis \ (high byte) \ \ Stored as a 16-bit value (dxVelocityHi dxVelocityLo) .dyRotationHi SKIP 1 \ Rate of change of the plane's rotation in the y-axis \ (high byte) \ \ Stored as a 16-bit value (dyVelocityHi dyVelocityLo) .dzRotationHi SKIP 1 \ Rate of change of the plane's rotation in the z-axis \ (high byte) \ \ Stored as a 16-bit value (dzVelocityHi dzVelocityLo) .xVelocityTop SKIP 1 \ Plane velocity in the x-axis from the perspective \ of the outside world (top byte) \ \ Stored as a 24-bit value (xVelocityTop xVelocityHi \ xVelocityLo) .yVelocityTop SKIP 1 \ Plane velocity in the y-axis from the perspective \ of the outside world (top byte) \ \ This is the same as the vertical speed, and is from \ the perspective of the world outside the plane, so \ yVelocity is the vertical speed of the plane, \ irrespective of how the plane is orientated \ \ For the plane's speed from the point of view of the \ plane, see (xVelocityP yVelocityP zVelocityP) \ \ Stored as 128/425 * vertical speed in feet per minute, \ so: \ \ 1000 feet/minute is stored as 128/425 * 1000 = 301 \ \ 4000 feet/minute is stored as 128/425 * 4000 = 1205 \ \ Shown on indicator 4 \ \ Stored as a 24-bit value (yVelocityTop yVelocityHi \ yVelocityLo) .zVelocityTop SKIP 1 \ Plane velocity in the z-axis from the perspective \ of the outside world (top byte) \ \ Stored as a 24-bit value (zVelocityTop zVelocityHi \ zVelocityLo) .slipRate SKIP 1 \ Slip rate \ \ Shown on indicator 6 SKIP 3 \ These bytes appear to be unused .keyLoggerLo SKIP 6 \ Key logger (low byte) \ \ Populated with values from keyTable1Lo or keyTable2Lo \ when a key is pressed, or 0 if neither is pressed: \ \ L or < (elevator dive/pitch) = -1 or 1 \ A or + (rudder yaw left/right) = -1 or 1 \ S or D (aileron bank left/right) = -1 or 1 \ W or E (throttle down/up) = -15 or 15 \ U or B (undercarriage, brakes) = 4 or 7 \ F or SHIFT (flaps, fire) = 5 or 8 SKIP 2 \ These bytes appear to be unused .xTemp2Lo SKIP 1 \ The low byte of the xTemp2 temporary variable \ \ Stored as a 24-bit value (xTemp2Top xTemp2Hi xTemp2Lo) .yTemp2Lo SKIP 1 \ The low byte of the yTemp2 temporary variable \ \ Stored as a 24-bit value (yTemp2Top yTemp2Hi yTemp2Lo) .zTemp2Lo SKIP 1 \ The low byte of the zTemp2 temporary variable \ \ Stored as a 24-bit value (zTemp2Top zTemp2Hi zTemp2Lo) SKIP 5 \ These bytes appear to be unused .keyLoggerHi SKIP 6 \ Key logger (high byte) \ \ Populated with values from keyTable1Hi or keyTable2Hi \ when a key is pressed, or 0 if neither is pressed: \ \ L or < (elevator dive/pitch) = -1 or 1 \ A or + (rudder yaw left/right) = -1 or 1 \ S or D (aileron bank left/right) = -1 or 1 \ W or E (throttle down/up) = -15 or 15 \ U or B (undercarriage, brakes) = 4 or 7 \ F or SHIFT (flaps, fire) = 5 or 8 SKIP 2 \ These bytes appear to be unused .xTemp2Hi SKIP 1 \ The high byte of the xTemp2 temporary variable \ \ Stored as a 24-bit value (xTemp2Top xTemp2Hi xTemp2Lo) .yTemp2Hi SKIP 1 \ The high byte of the yTemp2 temporary variable \ \ Stored as a 24-bit value (yTemp2Top yTemp2Hi yTemp2Lo) .zTemp2Hi SKIP 1 \ The high byte of the zTemp2 temporary variable \ \ Stored as a 24-bit value (zTemp2Top zTemp2Hi zTemp2Lo) .xTemp2Top SKIP 1 \ The top byte of the xTemp2 temporary variable \ \ Stored as a 24-bit value (xTemp2Top xTemp2Hi xTemp2Lo) .yTemp2Top SKIP 1 \ The top byte of the yTemp2 temporary variable \ \ Stored as a 24-bit value (yTemp2Top yTemp2Hi yTemp2Lo) .zTemp2Top SKIP 1 \ The top byte of the zTemp2 temporary variable \ \ Stored as a 24-bit value (zTemp2Top zTemp2Hi zTemp2Lo) .gunSights SKIP 1 \ Gun sights status \ \ * Bit 6 = 1 while "I" is being held down \ \ * Bit 7 = 1 when sights are being shown \ 0 when sights are not being shown .isObject SKIP 1 \ Temporary storage, used to store the object ID when we \ check the visibility of an object in ProcessLine and \ call SetObjectCoords to set its coordinates .pointId SKIP 1 \ Temporary storage, used to store the ID of the current \ point when checking a line's visibility in the \ ProcessLine routine .maxCoord SKIP 1 \ Temporary storage, used to store the maximum start \ point coordinate when clipping lines .colourLogic SKIP 1 \ Determines the logic and bit patterns used to draw the \ canopy view: \ \ * %00000000 = erase lines \ Gets set to this value after each screen flip \ Sets AND logic for screen writing \ Sets bit patterns to erase the screen \ See EraseCanopyLines \ \ * %01000000 when colourCycle is %11110000 \ Sets ORA logic for screen writing \ See FlipColours \ \ * %10000000 when colourCycle is %00001111 \ Sets ORA logic for screen writing \ See ResetLineLists, FlipColours \ \ Set to %10000000 for each new game .colourCycle SKIP 1 \ Determines which of the two canopy screens we are \ showing, so we can use colour cycling for smooth \ animation \ \ * %00001111 = show colour 1, hide colour 2 \ \ * %11110000 = show colour 2, hide colour 1 \ \ We show a colour by mapping it to white, and hide a \ colour by mapping it to black \ \ Set to %00001111 for each new game .matrixAxis SKIP 1 \ The axis to be processed by the matrix routines, \ specifically those that populate the matrices \ \ * 0 = x-axis \ \ * 1 = y-axis \ \ * 2 = z-axis .onGround SKIP 1 \ "On the ground" status \ \ * 0 = we are not on the ground \ \ * 1 = we are on the ground \ \ Set to 1 in ResetVariables (on the ground) .previousListEnd SKIP 1 \ Used to store the value of linesToHideEnd at the \ start of each iteration of the main loop, so we can \ refer to it at the end of the main loop to see if \ we have added anything to the list during the main \ loop .startStatus SKIP 1 \ Temporary storage, used to store the point status byte \ for the start point of a projected line .pointCount SKIP 1 \ Temporary storage, used as a counter in ProcessLine \ to check the start and end points of the line .pressingT SKIP 1 \ Set to 0 in the main loop if "T" is not being pressed, \ otherwise set to 1, to prevent holding down "T" from \ constantly switching the engine on and off .showRunwayDashes SKIP 1 \ Determines whether the dashes down the middle of the \ runway are close enough to be visible: \ \ * Bit 7: \ \ * 0 = the runway dashes are visible \ \ * 1 = the runway dashes are not visible .matrixNumber SKIP 1 \ The matrix used in matrix operations: \ \ * 0 = matrix 1 \ * 9 = matrix 2 \ * 18 = matrix 3 \ * 27 = matrix 4 .objectId SKIP 1 \ Temporary storage for an object ID (0 to 39) \ \ This is called OB in the original source code .pressingTab SKIP 1 \ Bit 7 determines whether TAB is being pressed \ \ * 0 = not being pressed \ \ * 128 = being pressed \ \ This value is set in the ToggleJoystick routine .showLine SKIP 1 \ Determines whether a line is visible: \ \ * Bit 6: \ \ * 0 = the line fits into Aviator's 3D world \ \ * 1 = the line calculations overflowed, so the \ line does not fit into Aviator's 3D world \ \ * Bit 7: \ \ * 0 = the line is visible \ \ * 1 = the line is not visible .objectAnchorPoint SKIP 1 \ Used to store the anchor point of the current object \ \ This is the point to which all the other points in \ the object, i.e. those in xObjectPoint, yObjectPoint \ and zObjectPoint, are relative \ \ In other words, this is effectively the object's \ coordinate .lineBuffer1Count SKIP 1 \ Offset of the last line stored in buffer 1 \ \ * -1 = buffer 1 is empty \ \ * 0 to 46 = buffer 1 contains lineBuffer1Count + 1 \ lines but is not full \ \ * 47 = buffer 1 is full and contains 48 lines \ \ We can buffer up to 96 lines, with 48 in each of the \ two line buffers, so the maximum number of lines on \ screen at any one time is 48 lines out of the 193 \ lines defined in the world \ \ Set to -1 in ResetVariables (buffer 1 empty) .lineBuffer2Count SKIP 1 \ Offset of the last line stored in buffer 2 \ \ * 47 = buffer 2 is empty \ \ * 48 to 94 = buffer 2 contains lineBuffer2Count + 1 \ lines but is not full \ \ * 95 = buffer 2 is full, contains 48 lines \ \ We can buffer up to 96 lines, with 48 in each of the \ two line buffers, so the maximum number of lines on \ screen at any one time is 48 lines out of the 193 \ lines defined in the world \ \ Set to 47 in ResetVariables (buffer 2 empty) .pressingUFBS SKIP 5 \ Determines whether any of the following keys are \ being pressed: \ \ * pressingUFBS = 1 while the undercarriage key "U" \ is being pressed, 0 otherwise \ \ * pressingUFBS+1 = 1 while the flaps key "F" is \ being pressed, 0 otherwise \ \ * pressingUFBS+2 is not used \ \ * pressingUFBS+3 = 1 while the brake key "B" is \ being pressed, 0 otherwise \ \ * pressingUFBS+4 = 1 while the fire key SHIFT is \ being pressed, 0 otherwise .pointsToAward SKIP 1 \ Used to store the points scored from flying skills, so \ they can be added to the score once the task has been \ completed .scoreDisplayTimer SKIP 1 \ Counter for removing the score after displaying it \ for a fixed amount of time .gunSoundCounter SKIP 1 \ Counter for the number of firing sounds we make when \ firing our guns (which makes the sound of two shots) .xDashesVectorLo SKIP 1 \ The low byte of the xDashesVector temporary variable \ \ Stored as a 16-bit value (xDashesVectorHi \ xDashesVectorLo) .yDashesVectorLo SKIP 1 \ The low byte of the yDashesVector temporary variable \ \ Stored as a 16-bit value (yDashesVectorHi \ yDashesVectorLo) .zDashesVectorLo SKIP 1 \ The low byte of the yDashesVector temporary variable \ \ Stored as a 16-bit value (zDashesVectorHi \ zDashesVectorLo) .xDashesVectorHi SKIP 1 \ The high byte of the xDashesVector temporary variable \ \ Stored as a 16-bit value (xDashesVectorHi \ xDashesVectorLo) .yDashesVectorHi SKIP 1 \ The high byte of the yDashesVector temporary variable \ \ Stored as a 16-bit value (yDashesVectorHi \ yDashesVectorLo) .zDashesVectorHi SKIP 1 \ The high byte of the yDashesVector temporary variable \ \ Stored as a 16-bit value (zDashesVectorHi \ zDashesVectorLo) .xTemp1Lo SKIP 1 \ The low byte of the xTemp1 temporary variable \ \ Stored as a 16-bit value (xTemp1Hi xTemp1Lo) .yTemp1Lo SKIP 1 \ The low byte of the yTemp1 temporary variable \ \ Stored as a 16-bit value (yTemp1Hi yTemp1Lo) .zTemp1Lo SKIP 1 \ The low byte of the zTemp1 temporary variable \ \ Stored as a 16-bit value (zTemp1Hi zTemp1Lo) .xTemp1Hi SKIP 1 \ The high byte of the xTemp1 temporary variable \ \ Stored as a 16-bit value (xTemp1Hi xTemp1Lo) .yTemp1Hi SKIP 1 \ The high byte of the yTemp1 temporary variable \ \ Stored as a 16-bit value (yTemp1Hi yTemp1Lo) .zTemp1Hi SKIP 1 \ The high byte of the zTemp1 temporary variable \ \ Stored as a 16-bit value (zTemp1Hi zTemp1Lo) .alien SKIP 0 \ Temporary storage, used as a flag to indicate the \ alien when updating the radar (shares a memory \ location with the objCount variable) .objCount SKIP 1 \ Temporary storage, used as a loop counter in the \ object group visibility checks (shares a memory \ location with the alien variable) .themeStatus SKIP 1 \ Theme status \ \ * Positive (bit 7 = 0) = the Theme is enabled and \ the value is the number of aliens we still have \ to add to the current wave (this starts at 8 and \ decreases down to 0 as each new alien is added) \ \ * Negative (bit 7 = 1) = the Theme is not enabled \ \ Set to 255 (Theme not enabled) in ResetVariables .landingStatus SKIP 1 \ The current landing status \ \ A flag that determines whether we have landed safely \ on the runway, and therefore whether we fill up with \ fuel and so on \ \ * Positive = do all the landing-based tasks \ mentioned below \ \ * 0 = do not enable the Theme on firing \ do not fill up with fuel \ do not award points for landing \ \ * Negative = do not enable the Theme on firing \ do not fill up with fuel \ \ Set to 1 in ResetVariables (do all landing tasks) \ \ Set to %01000000 when speed is 0 in ApplyFlightModel \ \ Gets shifted left with a 1 inserted in bit 0 in \ ProcessLanding if we are doing an emergency landing .engineStatus SKIP 1 \ Engine status \ \ * 0 = engine is off \ \ * Non-zero = engine is on .xRotationLo SKIP 1 \ Plane rotation angle around the x-axis (low byte) \ \ Same as the plane's pitch angle \ \ Stored as a 16-bit value (xRotationHi xRotationLo) .yRotationLo SKIP 1 \ Plane rotation angle around the y-axis (low byte) \ \ Same as the plane's yaw angle, which is also the \ direction of the compass (i.e. the plane's heading) \ \ Stored as a 16-bit value (yRotationHi yRotationLo) .zRotationLo SKIP 1 \ Plane rotation angle around the z-axis (low byte) \ \ Same as the plane's roll angle \ \ Stored as a 16-bit value (zRotationHi zRotationLo) .xPlaneLo SKIP 1 \ Plane longitude/x-coordinate (low byte) \ \ Set to &C6E5 in ResetVariables \ \ Stored as a 32-bit value (xPlaneTop xPlaneHi xPlaneLo \ xPlaneBot) .yPlaneLo SKIP 1 \ Plane altitude/y-coordinate (low byte) \ \ Stored as the altitude in feet x 4 \ \ Shown on indicator 2 \ \ Set to (0 10) in ResetVariables \ \ Stored as a 32-bit value (yPlaneTop yPlaneHi yPlaneLo \ yPlaneBot) .zPlaneLo SKIP 1 \ Plane latitude/z-coordinate (low byte) \ \ Set to &485C in ResetVariables \ \ Stored as a 32-bit value (zPlaneTop zPlaneHi zPlaneLo \ zPlaneBot) .yLandingGear SKIP 1 \ The vertical distance between the cockpit and the \ lowest part of the plane \ \ * 5 when undercarriage is up \ \ * 10 when undercarriage is down .firingStatus SKIP 1 \ Firing status \ \ * 0 = no bullets in the air \ \ * Non-zero = guns fired, bullets in the air \ \ This is called FRFLAG in the original source code .ucStatus SKIP 1 \ Undercarriage status \ \ * 0 = undercarriage is up \ \ * Non-zero = undercarriage is down \ \ Set to 1 (undercarriage is down) in ResetVariables .flapsStatus SKIP 1 \ Flaps status \ \ * 0 = flaps are off (raised) \ \ * Non-zero = flaps are on (dropped) \ \ Set to 0 (flaps are off) in ResetVariables SKIP 1 \ This byte appears to be unused .brakesStatus SKIP 1 \ Brakes status \ \ * 0 = brakes are off \ \ * Non-zero = brakes are on \ \ Set to 1 (brakes are on) in ResetVariables SKIP 1 \ This byte appears to be unused .propellorStatus SKIP 1 \ Propellor status \ \ * 0 = propellor is working \ \ * Non-zero = propellor is broken \ \ If we make a crash landing with the undercarriage up, \ the propellor breaks and we can't turn the engine on .alienSpeed SKIP 1 \ The speed at which the aliens move, which starts at 10 \ for the first wave, then 14 for the second, 18 for the \ third, and 22 for all subsequent waves \ \ Set to 10 in ResetVariables .reached512ft SKIP 1 \ Have we reached 512 feet in altitude since taking off? \ \ * 0 = no \ \ * Non-zero = yes \ \ The height measured is 512 feet, rather than the 500 \ feet mentioned in the maunal, as this is set to \ non-zero when the plane's altitude in yPlaneHi >= 2 .xRotationHi SKIP 1 \ Plane rotation angle around the x-axis (high byte) \ \ Same as the plane's pitch angle \ \ * 0 = straight ahead (bit 6 clear, bit 7 clear) \ * 64 = vertical up (bit 6 set, bit 7 clear) \ * 128 = backwards (bit 6 clear, bit 7 set) \ * 192 = nosedive (bit 6 set, bit 7 set) \ \ Set to 7 in ResetVariables \ \ Stored as a 16-bit value (xRotationHi xRotationLo) .yRotationHi SKIP 1 \ Plane rotation angle around the y-axis (high byte) \ \ Same as the plane's yaw angle, which is also the \ direction of the compass (i.e. the plane's heading) \ \ * 0 = north (bit 6 clear, bit 7 clear) \ * 64 = east (bit 6 set, bit 7 clear) \ * 128 = south (bit 6 clear, bit 7 set) \ * 192 = west (bit 6 set, bit 7 set) \ \ Shown on indicator 0 \ \ Stored as a 16-bit value (yRotationHi yRotationLo) .zRotationHi SKIP 1 \ Plane rotation angle around the z-axis (high byte) \ \ Same as the plane's roll angle \ \ * 0 = horizontal (bit 6 clear, bit 7 clear) \ * 64 = vertical right (bit 6 set, bit 7 clear) \ * 128 = upside down (bit 6 clear, bit 7 set) \ * 192 = vertical left (bit 6 set, bit 7 set) \ \ Stored as a 16-bit value (zRotationHi zRotationLo) .xPlaneHi SKIP 1 \ Plane longitude/x-coordinate (high byte) \ \ Set to &C6E5 in ResetVariables \ \ Stored as a 32-bit value (xPlaneTop xPlaneHi xPlaneLo \ xPlaneBot) .yPlaneHi SKIP 1 \ Plane altitude/y-coordinate (high byte) \ \ Stored as the altitude in feet x 4 \ \ Shown on indicator 2 \ \ Set to (0 10) in ResetVariables \ \ Stored as a 32-bit value (yPlaneTop yPlaneHi yPlaneLo \ yPlaneBot) .zPlaneHi SKIP 1 \ Plane latitude/z-coordinate (high byte) \ \ Set to &485C in ResetVariables \ \ Stored as a 32-bit value (zPlaneTop zPlaneHi zPlaneLo \ zPlaneBot)