Difference between revisions of "Trackballs"
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On an optipac the "A/HI" jumper should be set. | On an optipac the "A/HI" jumper should be set. | ||
| − | There were a number of different boards with this same pin-out. | + | There were a number of slightly different boards with this same pin-out. |
| − | There are a | + | There are a few places that sell replacement bearings and roller-shafts for these, they are often referred to as 4" trackball rollers. |
Revision as of 23:15, 2 March 2006
This page should contain brief descriptions of various trackballs available, and details of their setup. If any one portion of the page starts getting a little too long, a seperate page may be started for that topic.
4.5" Atari Trackballs (Missile Command, Atari Football)
These giant trackballs are sometimes known as 4-inch, but are actually 4 and a half inches in diameter. They were some of the first trackballs put into use, and are designed to survive intense abuse.
Happs sells a 4.5" trackball. The ball itself is usable in an Atari 4.5" (a 4.5" diameter sphere is a 4.5" diameter sphere), but the mechanism itself is a different, less industrial design.
Any 4.5" diameter ball, particularly a candle-pin and/or duck-pin bowling ball, is a swap-out replacement for the 25+ year old originals.
The original optical boards on these are fairly easy to interface with an Opti-PAC (and therefore most other optical control interfaces). This is the pin-out for the 10-pin molex plug found on the optical boards:
| 1 | no signal |
| 2 | no signal |
| 3 | no signal |
| 4 | Axis 1 |
| 5 | no signal |
| 6 | no signal |
| 7 | no signal |
| 8 | Axis 2 |
| 9 | +5v |
| 10 | ground |
On an optipac the "A/HI" jumper should be set.
There were a number of slightly different boards with this same pin-out.
There are a few places that sell replacement bearings and roller-shafts for these, they are often referred to as 4" trackball rollers.
