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As some of you may or may not know, Thomas Jentzsch and I have converted some 2600 games to use a Trak-Ball controller. Thomas originally converted Missile Command to use the trackball over a decade ago. More recently Thomas converted Centipede and Reactor. I joined the fun and did Millipede. The thread we posted the ROMs in wasn't really related... it all came about kind of spontaneously. That thread does contain a whole whack of routines if anyone is ever interested. It all starts on page 4 and goes for several pages. Here in this thread are the latest ROMs, organized, for easy finding. Note for CX80 Trak-Balls: Atari CX80 Trak-Balls work the same as the CX22 Trak-Balls. However, some retailers modified the CX80's to be compatible with the ST Mouse (Atari Mouse). If you have a CX80 then you will have to try both the Trak-Ball and Atari Mouse ROMs to see which one works with your Trak-Ball, or try the detection ROM. It is believed only a small number of Trak-Balls were modified. Note for CX22 Trak-Balls: An early version of this controller only works in joystick emulation mode and cannot be used with these ROMs unless modified. Check for the presence of the "joystick/trakball" switch on the bottom left side to ensure that you have the later compatible version and set it in "trakball" mode. Wico Command Controller Trackballs: These trackballs don't work with these ROMs as is. However, the Wico Trackball can be converted to use the CX80 (Atari Mouse) ROMs. See here for details. Bob Colbert's Homebrew which can use an Amiga Mouse, Atari Mouse, Driving Controller, or Joystick! Link: Stell-A-Sketch (Bob Colbert) Link: Trak-Ball/Amiga Mouse detection (TJ) Roms: Trak-Ball Detect v1.0.zip Link: Missile Command TB (TJ) Roms: Missile_Command_TB_(TJ).zip Roms: Missile_Command_CX_22_v1.3_(TJ).zip Link: Centipede TB (TJ) Roms: Centipede_TB_(TJ)_v1.4.zip Link: Reactor TB (TJ) Roms: Reactor_TB_(TJ)_v1.3.zip Link: Millipede Amiga and ST Mouse Info (Omega) Millipede(Trakball)v6.5.zip Link: Challenge Of Nexar, The (TJ) Roms: Challenge_of_Nexar_TB_(TJ)_NTSC_V1.1.zip Roms: Challenge_of_Nexar_TB_(TJ)_PAL_V1.1.zip Roms: Challenge_of_Nexar_CX22_(TJ)_v1.2.zip Link: SW_Arcade (Omega) Roms: SW_Arcade(Trackball)V4.zip Roms: SW_Arcade(Trackball)V4__Inverted_Y_Axis.zip Link: SpaceMasterX7_(Omega) Roms: SpaceMasterX7_(Trackball).zip Link: Missile Control (TJ) Roms: Missile_Control_TB_(TJ)_NTSC_V1.15.zip Roms: Missile_Control_TB_(TJ)_PAL_V1.15.zip Link: Marble Craze (TJ) NEW: Marble_Craze_TB_(TJ)_NTSC_V1.0.zip NEW: Marble_Craze_TB_(TJ)_PAL_V1.0.zip