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av:dreamcastav [2010/04/28 04:39] – gregory | av:dreamcastav [2013/01/21 02:29] – [Mode Selection Signals Chart] RGB32E |
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<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's menu, or a blank screen. </box> | <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's menu, or a blank screen. </box> |
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If a certain game will not boot in either RGB mode it can sometimes be 'forced' into RGB by fitting a break-before-make switch between ground and one, or both, mode select pins. Once this is done power up the Dreamcast with the switch in the 'standard mode' (Neither pin grounded) and flick the switch after the game disk has already started to be read (When loading original GD-ROM's you will hear a 'beep' sound from the drive at this point) this can often trick incompatible games into the desired mode. You can find more info on some [[http://cvresumewritingservices.org/professional-resume.php|professional resumes]] sites. | If a certain game will not boot in either RGB mode it can sometimes be 'forced' into RGB by fitting a break-before-make switch between ground and one, or both, mode select pins. Once this is done power up the Dreamcast with the switch in the 'standard mode' (Neither pin grounded) and flick the switch after the game disk has already started to be read (When loading original GD-ROM's you will hear a 'beep' sound from the drive at this point) this can often trick incompatible games into the desired mode. |
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==== Mode Selection Signals Chart ==== | ==== Mode Selection Signals Chart ==== |
| 8 | Vertical Sync | ? | ? | V-Sync | | | 8 | Vertical Sync | ? | ? | V-Sync | |
| 9 | Horizontal Sync | ? | ? | H-Sync | | | 9 | Horizontal Sync | ? | ? | H-Sync | |
| 10 | Composite Sync| ? | C-Sync | ? | | | 10 | Composite Sync| ? | C-Sync | 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 | |