MiSTer FPGA IO Analog Pro Board | Analog Video & Audio

Unlock the analog potential of MiSTer FPGA with the IO Analog Pro! Featuring reference-quality analog video, crystal clear audio, soft power toggle, and compatibility with the Aluminum Armor case.

Video Output (via Sega Saturn AV port)

• RGBs with correct 700mV levels
• YPbPr component video
• S-Video (native YC core support)
• Composite video (native YC core support)
• Powered by ADV7125 24-bit Video DAC

Audio Output

• Hi-Fi analog audio via Saturn AV port
• 3.5mm headphone jack

Power

• USB-C power input (5V 2A minimum, 5V 3A recommended)
• Works with USB-A and USB-C cables
• Soft power toggle - no more pulling cables

Build Quality

• 1% or better tolerance resistors for extreme consistency
• Factory assembled and tested
• Fan + heatsink option available

Compatibility

Designed for the MiSTer Aluminum Armor case. 

Choosing between IO Direct and IO Analog Pro?

• IO Analog Pro
  • Uses GPIO-based RGB DAC for analog AV (simultaneous HDMI + Analog)
  • Doesn't support dual SDRAM
• IO Direct
  • Uses HDMI RGB DAC for analog AV (no simultaneous HDMI + Analog)
  • Supports dual SDRAM

Choose IO Direct if: You want dual SDRAM support with either HDMI or analog video
Choose IO Analog Pro if: You want dual video output (CRT + HDMI simultaneously)

Configuration

MiSTer.ini:

• direct_video=1 or direct_video=2
• vga_mode=rgb or ypbpr or svideo
• composite_sync=1
• vga_sog=1 (for YPbPr)
• Toggle SOG switch to the on position for YPbPr

Audio selection switch:

• Set DE10-nano switch SW0 (closest to the ethernet port)
  • Outer position: SPDIF via 3.5mm
  • Inner position: analog audio via 3.5mm

Reference MiSTer.ini settings

https://github.com/misteraddons/mister_ini/tree/main/Analog%20Video