Cylon Attack part 2

This is a continuation of my work in progress Cylon Attack game for the Tektronix 4054A vector graphics computer with Option 30 Dynamic Graphics GPU card.
I modified my Tektronix 4952 joystick by bypassing the electronics inside the joystick and directly connecting the potentiometers to the 4054A joystick connector. This allows 'normal' PC joystick operation with fast motion. In addition, I created a vector outline of the Cylon and I am using a Tektronix A-Series Enhanced BASIC command called INSIDE which detects whether an X,Y point is inside the outline polygon or outside.
I have also begun to add Tektronix 4052R12 Enhanced Graphics option ROM sound effects for firing the laser and Cylon explosion.