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av:dreamcastav [2019/07/27 22:29]
Link83 [Mode Selection Signals Chart]
av:dreamcastav [2019/07/28 00:15]
Link83 [Mode Selection Signals Chart]
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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