Int E0 Fn 0003  - Pcrobots V1.41 - "shoot" - Fire A Shell At Another Robo  [g]

   AX = 0003h
   BX = direction (0-359 degrees)
   CX = range (0-700)

Return: AX = status (0000h not fired, else ID of shell fired)

Notes: up to seven shells may be in flight for a robot at one time; the cannon
     takes 50 ticks to reload
   this call also terminates the current robot's turn

See Also: AX=0000h,AX=0001h,AX=0002h,AX=002Ch