av:dreamcastav
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av:dreamcastav [2009/11/01 15:54] – IiJhImnAwbBg 117.3.0.15 | av:dreamcastav [2019/07/27 21:43] – [Mode Selection Signals Chart] Link83 | ||
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- | WMF3y8 | + | ===== Dreamcast AV Connector ===== |
+ | The Dreamcast connector is a wild, multi-functioned beast. | ||
+ | |||
+ | {{av:dreamcast_av.jpg}} | ||
+ | |||
+ | ^Pin^Description^Pin^Description^ | ||
+ | | 1 | Ground | ||
+ | | 2 | Right Audio | 10 |Composite Sync| | ||
+ | | 3 | Left Audio | 11 |S-Video Chrominance (C)| | ||
+ | | 4 | +12v | 12 |S-Video Luminance (Y)| | ||
+ | | 5 | +5v | 13 |Composite Video| | ||
+ | | 6 | Mode Select 1 | 14 |Blue Out | | ||
+ | | 7 | Mode Select 2 | 15 |Green Out | | ||
+ | | 8 | Vertical Sync (for VGA) | 16 |Red Out | | ||
+ | |||
+ | ==== Usage Notes ==== | ||
+ | The mode select pins are 6 and 7. Ground either one for two kinds of 15kHz RGB (SCART), ground both for 31kHz RGB (VGA). | ||
+ | |||
+ | You should use a 220uF capacitor on each of the RGB lines (+ towards console). | ||
+ | |||
+ | <box round warning 40% |15kHz/31kHz RGB Note:> Most Dreamcast games are compatible with both 15kHz and 31kHz RGB modes (SCART and VGA) However a small percentage are not compatible and will show either a warning message on the Dreamcast' | ||
+ | |||
+ | If a certain game will not boot in either RGB mode it can sometimes be ' | ||
+ | |||
+ | ==== Mode Selection Signals Chart ==== | ||
+ | When the mode select pins are used certain signal outputs are enabled or disabled:- | ||
+ | |||
+ | ^Pin^Description^Standard ' | ||
+ | | 1 | Ground | ||
+ | | 2 | Right Audio | Right Audio | Right Audio | Right Audio | | ||
+ | | 3 | Left Audio | Left Audio | Left Audio | Left Audio | | ||
+ | | 4 | +12v | +12v | +12v | +12v | | ||
+ | | 5 | +5v | +5v | +5v | +5v | | ||
+ | | 6 | Mode Select 1 | Unused | Unused | Grounded | | ||
+ | | 7 | Mode Select 2 | Unused | Grounded | Grounded | | ||
+ | | 8 | Vertical Sync | VSYNC | VSYNC | VSYNC | | ||
+ | | 9 | Horizontal Sync | HSYNC | HSYNC | HSYNC | | ||
+ | | 10 | Composite Sync| ? | CSYNC | Disabled | | ||
+ | | 11 | S-Video Chroma (C)| S-Video Chroma | ? | Disabled | | ||
+ | | 12 | S-Video Luma (Y)| S-Video Luma | ? | Disabled | | ||
+ | | 13 | Composite Video| Composite Video | ? | Disabled | | ||
+ | | 14 | Blue | Disabled | Blue | Blue | | ||
+ | | 15 | Green | Disabled | Green | Green | | ||
+ | | 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 ' | ||
+ | |||
+ | ==== Other ==== | ||
+ | [[dreamcastRGB|Ryu' | ||
+ | [[http://www.gamesx.com/grafx/dricas.gif|Dreamcast VGA Box Schematic]] | ||
+ | |||
+ | ---- | ||
+ | See here for the [[http://www.gamesx.com/avpinouts/ |
av/dreamcastav.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1