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av:dreamcast_480i-480p_scart_cable [2007/08/08 13:32]
127.0.0.1 external edit
av:dreamcast_480i-480p_scart_cable [2008/08/04 13:02] (current)
66.229.56.204
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 ==== Dreamcast 480p/480i SCART Cable ==== ==== Dreamcast 480p/480i SCART Cable ====
  
-The Dreamcast outputs both 480i and 480p video. Rather than using a regular scart cable and a VGA box I wanted to combine the two into a single scart cable. To do this it's necessary to combine the TTL logic level H and V sync siggnals generated by the Dreamcast and produce a 75ohm impeddance ​SCART compatible signal.+The Dreamcast outputs both 480i and 480p video. Rather than using a regular scart cable and a VGA box I wanted to combine the two into a single scart cable. To do this it's necessary to combine the TTL logic level H and V sync siggnals generated by the Dreamcast and produce a 75ohm impedance ​SCART compatible signal.
  
-The Dreamcast has two RGB selsect ​lines pin 7 (rgb mode select) and pin 6 (VGA mode select). Pin 7 should be tied to ground as it is grounded for either type of rgb. I used a DPDT switch to switch pin 6 between floating and ground and the sync from csync to the combined 480p sync signal.+The Dreamcast has two RGB select ​lines pin 7 (rgb mode select) and pin 6 (VGA mode select). Pin 7 should be tied to ground as it is grounded for either type of rgb. I used a DPDT switch to switch pin 6 between floating and ground and the sync from csync to the combined 480p sync signal.
  
  
 
 av/dreamcast_480i-480p_scart_cable.txt ยท Last modified: 2008/08/04 13:02 by 66.229.56.204
 
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