Sega Type II IR
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Infrared sensor based technology developed by Sega and still used in modern games since it doesn't require CRTs.
Components
Gun sense IO / sense board
There are multiple revisions of boards, denoted by the last 2 digits of the part #.
- 838-13143-01 to 838-13143-03 only works with Jurrasic Park The Lost World ( JPTLW ) since it only supports 12 LED boards.
- 838-13143-04 and above can be upgraded via eeprom swap.
- revisions are backward compatible, ie, 838-13143-11 will play everything from JPTLW up to Rambo ( Lindbergh ).
- some newer games may work with older revisions.
- takes the output from gun sensors and translate them into JVS x/y analog inputs.
- handles trigger button and forwards it to the JVS digital input connector.
Calibration
| POT/switch | usage |
|---|---|
| VR1 | unknown, leave centered |
| VR2 | unknown, leave centered |
| VR3 | unknown, leave centered |
| VR4 | X origin offset, gun should read 80 when centered |
| VR5 | Y origin offset, gun should read 80 when centered |
| coils | DO NOT TOUCH |
| SW1 | mirrored ( 29"/STD ) or direct ( 50"/DLX ) aiming |
| SW2 | 10 ( HOD ) or 12 ( JUL ) LED sensors |
CN1 loop 1<->2 : this is to eliminated IR interference from other sources. Useful if you have side by side gun cabinets, or any IR source ( like a light bulb ) reflecting on the screen.
