Reflex Prism - Digital Video to Analog Video Converter

THE FIRST BATCH OF REFLEX PRISM IS HERE! I ordered a small quantity for the first round, as this is a new product. However, I enabled pre-orders for the next batch as a separate variant!

Features:

• Lag free 1:1 digital video to RGB, YPbPr, and S-Video conversion - no resolution (upscale/downscale), or crop/aspect ratio changes from input to output.
• Reference quality dual, simultaneous video output (Mini-Din 10 simultaneous output requires special devices)
  • HD15 (VGA) port:
    • RGB or YPbPr (controlled by switch)
    • Up to 1920x1200 (matches digital video resolution)
    • Use this to convert 240p-1200p digital video to analog video for a high resolution monitor, PC CRT, etc.
  • Mini-Din 10) (Sega Saturn) Port:
    • RGB and S-video simultaneously
    • Composite video is present, but not supported due  to dot crawl
    • 240p/480i only (~240p/15kHz HDMI special resolution required)
      • Supported by MiSTer, but not modern PCs, consoles, etc.
      • Most HDMI devices output separate sync (HV) and a minimum of 480p/31kHz so they won’t work with the Mini-Din 10 port.
      • Pre-order Prisms will have an internal pin jumper to combine HV sync to composite sync. This should enable support for GCVideo and Raspberry Pi 240p output

• HiFi audio output
  • Buffered stereo audio for independent/simultaneous 3.5mm and Mini-Din 10 audio output.
  • The first batch of Prism requires a slim-profile 3.5mm audio cable with recessed outer jacket to clear the enclosure wall.

• • • This is the recommended audio cable (affiliate link): https://amzn.to/3Xk5ngt

Includes:

• Reflex Volt unit
• USB-A to USB-C power cable
• USA USB-A Power supply
  • Due to the NTSC encoder used, a clean power supply is required for clean Mini-Din 10 video output. Anker power supplies are also recommended. 
    
  • USB A power supply can power the MiSTer, and the MiSTer’s “Power Only” rear USB ports can power Prism.
  • International customers: Feel free to use the included power supply with a voltage converter, or explore a quality power supply for your region :)

Configuration:

• MiSTer FPGA MiSTer.ini 240p/480i configuration:
  • direct_video=1
    • direct_video=2 for MiSTer updates beyond 11/9/2025 will automatically work with HDMI displays or Prism without changing direct_video settings
  • vga_mode=rgb
    • Prism requires RGB video as the input format. It converts from RGB to YPbPr, and S-Video.
  • composite_sync=1 
• MiSTer FPGA MiSTer.ini 480p+ configuration:
  • direct_video=0
  • vga_mode=rgb
  • composite_sync=0 for PC CRTs that don’t support composite sync.
  • video_mode=____ 

Tested Devices:

Geometry or aspect ratio adjustments may be required. No guarantee of compatibility with all of these devices as firmware is always subject to change.

• Consumer CRTs and PVMs
  • MiSTer FPGA (RGB/YPbPr and RGB + S-Video)
  • Groovy MiSTer
• PC CRT / HDTV VGA
  • MiSTer FPGA (Analog IO board to consumer CRTs + Prism to PC CRT)
  • PC
  • SteamDeck
  • Mac mini
  • GCVideo to RGB (note: regenerate csync in GCVideo might not work for YPbPr)
  • Wii2HDMI
  • Wii U
  • Switch
  • Switch 2
  • PS3
  • PS5
  • Xbox Series X
  • Dreamcast HDMI

Peripherals:

• HD15 (VGA) to YPbPr cable
• HD15 (VGA) to SCART cable
• Mini-Din 10 to SCART cable
• Mini-Din 10 to RCA + S-Video cable (Universal)
• Mini-Din 10 to HD15 (VGA) cable for Extron and some video upscalers (RGBS and audio only)
• Slim Profile 3.5mm to RCA Audio Cable (Amazon Affiliate)

Troubleshooting