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Member Since 8 Jun 2009
OFFLINE Last Active Today, 6:05 PM

Topics I've Started

Conversion from RGB/HSV to GTIA color codes

Mon Apr 15, 2019 7:30 PM

I've been looking for this for some time and haven't had any luck.  Is there some kind of formula somewhere that can convert from RGB or HSV color values to NTSC GTIA codes?


Alternatively, if someone has already brute-forced this, a table of color mappings would be quite helpful.

Trakball research, request for assistance

Sat Sep 8, 2018 2:23 PM

I'm trying to work out some details about the trakball controller, and I could use a little help.


Unlike some of the 5200 superfans here, I only have one 5200 console and one trakball.  I've started working on a project that will feature trakball support (I'll just leave this here) and I'm trying to get a sense of the sort of controller values that the trakball sends.


My research on this hasn't turned up much, and what little I've found seems to be not quite correct.  What I'd like, if anyone is able, is for some kind volunteers to run the Diagnostic Cart's POKEY adjustment test.


This test displays the values that are currently coming from each controller.  I'm interested in what sort of numbers come from a trakball that isn't moving.  I'm mostly curious about how consistent these values are across different controllers.


Thanks in advance to anyone who can help me out with this.

RealSports Curling Release Thread

Sun Jun 24, 2018 12:07 PM



Curling is about to get REAL on your Atari 5200 SuperSystem!


Hear the roar of the stones as they slide down the ice!  Experience the tension of sweeping the final shot of a critical end!  Do you go for the tricky takeout, or do you take the safe play to blank the end?  "Chess on ice" comes to your living room and now the decisions are yours to make!


RealSports Curling features a true analog aiming system that takes advantage of the advanced design of the Atari 5200 joystick.  Only the SuperSystem could provide this level of control!  The sweepers aren't left out, as the 5200 joystick becomes the curling broom you always knew you wanted.  Sweep too hard and you'll ruin the shot, not hard enough and you'll wreck on that guard!


Several exciting play modes await you!  2, 4, or even 8 human players can test their skills against each other (some modes require a 4 port Atari 5200 SuperSystem).  Cooperate with your buddies or just play solo against a skilled CPU opponent!  You can even watch the SuperSystem play against itself!


Customize your team with extensive options, including left and right-handedness, hairstyle, color choices, and even Norwegian style curling pants.  The possibilities are limitless!


RealSports Curling features:

  • Selectable game lengths.  Play anything from a quick 1-end game to a full 10-end contest!
  • 0, 1, 2, 4, and 8 player modes!  (The 8 player mode and some 4 player modes require a 4 port system)
  • True analog control that unlocks the power of your 5200 joystick!
  • Norwegian pants!



This is alpha release number 3.  I believe this release fixes the last of the collision bugs.  I'm now head-down on implementing the CPU player.  This is the last remaining feature.


This earlier post offers some instructions on how to shoot.  If you don't know the rules of curling, you can find those online quite easily.


The download includes not just the ROM, but the complete assembly source, if anyone is interested in that.