The N64Digital is the ultimate video upgrade kit for the original Nintendo 64. This board must be installed into your own Nintendo 64. Please refer the installation documentation for more information.    
 
Digital lag-free HDMI output up to 1440p
Analog RGB / YPbPr through multiout
Simple firmware update procedure via WiFi
Video Filters: Deblur / Scanlines / Smoothing / Mask
 
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Installation Instructions