Current consoles and flashcarts (as of 9/10/2020)
-------------------------------------------------
MiSTer FPGA
+ Fully loaded!

NES/AV Famicom (composite)
+ EverDrive N8
+ PowerPak
+ FDSStick
SNES Mini/Super Famicom (RGB)
+ sd2snes
Nintendo 64 (RGB)
+ EverDrive 64
GameCube (HDMI)
+ GC Loader PNP
+ Game Boy Player
+ M3 Perfect
Wii (component)
+ modded w/hard drive
Switch

Mega Drive/Sega CD/32X (RGB)
+ Mega EverDrive
Saturn (RGB)
Dreamcast (VGA or S-Video, depending on resolution)

PlayStation (RGB)
PlayStation 2 (component)
+ modded w/hard drive
PlayStation Portable (component)

Atari XEGS (composite)

DOS PC (AMD K6-III 400 MHz, Cirrus Logic CL-GD5446, Sound Blaster 16 CT2740 w/integrated OPL3)

PARSEC supergun (RGB)
+ a handful of arcade PCBs

Steam Deck

Streaming hardware
------------------
Open Source Scan Converter (OSSC)
XRGB-mini Framemeister (for composite and S-Video sources)
GBS 8200 w/GBS Control (for PS2 and other interlaced component sources)
AVerMedia Live Gamer 4K