Knowing Dreamcast 15/31kHz cables, the RGC cable probably improperly combines the sync and is left with a janky csync signal in one or both of the modes that some devices don't like. I believe the retro-access cable uses a circuit designed by citrus3000psi/Dan that should also work properly.kitty666cats wrote:His cables are great - I have one of his PS1+PS2 sync on luma cables & the audio/video is flawless. I believe I’ve heard that his 15+31kHz Dreamcast cable has better compatibility than the RGC UK one (I’ve heard that theirs has some issues with some device, I forget if it was RT5X OSSC or something else) - not sure how different the circuit is, but it’s definitely different if that’s the case.
Still don't know of a good source for an actual Dreamcast VGA cable though!