- RGB Video Hack for PC Engine Duo and Turbo Grafx systems
- Adding RGB to NEC's TG/PCE machines
- PC Engine DUO-RX RGB mod (japanese)
- PC Engine Super Grafx RGB mod(japanese)
- N64/PC Engine RGB Amplifier(NJM2267 based)
- Sodipeng RGB amplifier
By the way, has anyone compared the output quality of ic based amp (like the NJM2267) vs the standard XRGB-2/Sodipeng transistor amp?