AddKBInt() 
     AddTimerInt() 
     AddVBlankInt() 
     ElapsedTime() 
     GetKey() 
     GetLanguageSelection() 
     QueryKeys() 
     ReadJoyPort() 
     RemKBInt() 
     RemTimerInt() 
     RemVBlankInt() 
     SetJoyPortAttrsA() 
     StartTimerInt() 
     StopTimerInt() 
     SystemControlA()