Sega Dreamcast VGA dongle

Features:

• An SD/VGA RGBS/RGBHV Switchable Dongle for Sega Dreamcast.

• This adapter plugs into the AV OUT port on a Sega Dreamcast and allows you to out put RGBS or RGBHV video signal, as well as a stereo audio signal.

• There are two independent toggle switches on this dongle for choosing different modes:

  1. SD / VGA allows you to choose between 525i (SD) and 525p (VGA) RGB output
  2. CSYNC / HV allows you to choose between attenuated CSync and 3.3V H/V-Sync

• This dongle is tested with various devices: SD+CSync VGA+CSync SD+HV VGA+HV RetroTINK 5X Yes Yes No No OSSC (AV3) Yes* Yes Yes Yes GBS Control Yes Yes Yes* Yes* PVM/BVM Yes Maybe No No PC Monitors No No No Yes

• The Yes* ones means they only work when the signal first went through an Extron switch. It's probably that the switch reconditioned the signals in some way to overcome the limitations of these devices and made things work. A direct connection does not work in these cases and it's expected.

• The only real compatibility issue encountered so far, is VGA mode + CSync on Sony BVM D series. This BVM doesn't like combined CSync and will not display it properly. However it will work properly in SD mode.

• Audio can be carried inside the VGA cable as-is, or extracted from the 3.5mm jack on the dongle.

• This dongle is created by the amazing Jeff Chen. Check out his Github page for more info about this product