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Table of Contents
Dreamcast AV Connector
The Dreamcast connector is a wild, multi-functioned beast. It offers several outputs in the default configuration (composite and s-video), and can output two kinds of 15kHz RGB, as well as VGA, when the proper mode is selected.
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | Ground | 9 | Horizontal Sync (for VGA) |
| 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 select pins are 6 and 7. Ground either one for two kinds of 15kHz RGB, ground both for VGA. Note that the Dreamcast outputs VGA, the box or cable does not 'upscan', so Dreamcast VGA boxes cannot be used for converting low-res RGB to VGA on other consoles.
You should use a 220uf capacitor on each of the RGB lines (+ towards console).
Note!! Please note that some of games will not run with a VGA box, or with the RGB/SCART mod. Most do, however.
When the mode selection pins are used certain signals are enabled or disabled:-
MODE SELECTION ACTIVE SIGNALS CHART
| Pin | Description | Standard Mode | 15KHz RGB Scart | 31kHz RGB VGA |
| 1 | Ground | Ground | Ground | 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 (for VGA) | ? | ? | V-Sync |
| 9 | Horizontal Sync (for VGA) | ? | ? | H-Sync |
| 10 | Composite Sync | ? | C-Sync | ? |
| 11 | S-video Chrominance (C) | S-Video Chroma | ? | Disabled |
| 12 | S-video Luminance (Y) | S-Video Luma | ? | Disabled |
| 13 | Composite Video | Composite Video | ? | Disabled |
| 14 | Blue Out | Disabled | Blue | Blue |
| 15 | Green Out | Disabled | Green | Green |
| 16 | Red Out | Disabled | Red | Red |
