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av:dreamcastav [2019/07/27 22:29]
Link83 [Mode Selection Signals Chart]
av:dreamcastav [2019/08/27 20:45] (current)
Line 34: Line 34:
 |  6  | Mode Select 1  | Unused | Unused | Grounded | |  6  | Mode Select 1  | Unused | Unused | Grounded |
 |  7  | Mode Select 2  | Unused | Grounded | Grounded | |  7  | Mode Select 2  | Unused | Grounded | Grounded |
-|  8  | Vertical Sync  | VSYNC | VSYNC | VSYNC | +|  8  | Vertical Sync  | VSYNC| VSYNC | VSYNC | 
-|  9  | Horizontal Sync  | HSYNC | HSYNC | HSYNC |+|  9  | Horizontal Sync  | HSYNC| HSYNC | HSYNC |
 | 10  | Composite Sync| ? | CSYNC | Disabled | | 10  | Composite Sync| ? | CSYNC | Disabled |
 | 11  | S-Video Chroma (C)| S-Video Chroma | ? | Disabled | | 11  | S-Video Chroma (C)| S-Video Chroma | ? | Disabled |
Line 43: Line 43:
 | 15  | Green  | Disabled | Green | Green | | 15  | Green  | Disabled | Green | Green |
 | 16  | Red  | Disabled | Red | Red | | 16  | Red  | Disabled | Red | Red |
-Note:The HSYNC and VSYNC signals on the AV port come directly from the 'Holly' GPU, so are likely active in all modes (Even standard 'TV' mode, when no RGB signals are present) CSYNC is generated by the DAC, so is unfortunately only active in specific modes.+Note:According to the [[schematics:console_related_schematics#dreamcast|schematics]] the HSYNC and VSYNC signals come directly from the 'HOLLY' GPU and are sent to both the DAC/Encoder and the AV portwhich means they are likely active in all modes (Even standard 'TV' mode, when no RGB signals are present) However CSYNC is generated by the DAC/Encoder, so is unfortunately only active in specific modes.
  
 ==== Other ==== ==== Other ====
 
 av/dreamcastav.txt · Last modified: 2019/08/27 20:45 (external edit)
 
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