av:dreamcastav
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
av:dreamcastav [2013/01/21 02:29] – [Mode Selection Signals Chart] RGB32E | av:dreamcastav [2019/07/27 21:41] – HSYNC and VSYNC come directly from the HOLLY GPU, so likely are active in all modes Link83 | ||
---|---|---|---|
Line 26: | Line 26: | ||
When the mode select pins are used certain signal outputs are enabled or disabled:- | When the mode select pins are used certain signal outputs are enabled or disabled:- | ||
- | ^Pin^Description^Standard Mode^15kHz RGB (SCART)^31kHz RGB (VGA)^ | + | ^Pin^Description^Standard |
| 1 | Ground | | 1 | Ground | ||
| 2 | Right Audio | Right Audio | Right Audio | Right Audio | | | 2 | Right Audio | Right Audio | Right Audio | Right Audio | | ||
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 | ? | ? | V-Sync | + | | 8 | Vertical Sync | VSYNC | VSYNC | VSYNC | |
- | | 9 | Horizontal Sync | ? | ? | H-Sync | + | | 9 | Horizontal Sync | HSYNC | HSYNC | HSYNC | |
- | | 10 | Composite Sync| ? | C-Sync | + | | 10 | Composite Sync| ? | CSYNC | Disabled | |
| 11 | S-Video Chroma (C)| S-Video Chroma | ? | Disabled | | | 11 | S-Video Chroma (C)| S-Video Chroma | ? | Disabled | | ||
| 12 | S-Video Luma (Y)| S-Video Luma | ? | Disabled | | | 12 | S-Video Luma (Y)| S-Video Luma | ? | 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 'TV mode' when no RGB signals are present) CSYNC is generated by the DAC, so is unfortunately only active in specific modes. | ||
==== Other ==== | ==== Other ==== |
av/dreamcastav.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1