Thread by @MisterAddons

Now that #MiSTerFPGA's PSX core has SNAC support, let's talk about how it will work. SNAC translates 5V controllers to 3.3V using level shifters. PSX controllers are natively 3.3V so the normal SNAC accessory won't work with them. Also, Blue1 added a dynamic csync/IRQ10 (1/4)

to one of the 7 SNAC pins so both GunCon and Hyper Blaster guns will work automagically. PSX controllers report their controller ID to the core, which switches modes appropriately. The upcoming PSX SNAC adapters will allow for 2P (or more with multitap). I plan on making (2/4)

new HDMI style adapters (current PSX adapters won't work as they're missing 2 wires as shown in the first picture). The last PSX SNAC feature I plan to have is external DC adapter for rumble. 5V rumble isn't quite enough, imo, as the spec is 7.5-8V. 9VDC is the most common (3/4)

DC adapter and that will work fine. Higher voltage increases the rumble motor frequency. Just make sure the polarity is center positive :). I'll likely have a switch to toggle between 5V rumble and external power rumble. All credit to @AzumFpg (PSX) and Blue1 (SNAC code). (4/4)

I've tested Dual Shock, GuncCon, Hyper Blaster with recoil, Micro Uzi (GC + Hyper Blaster modes), NeGcon, Jogcon, and multitap. The only issue at present is that Hyper Blaster aiming is off without in-game calibration. More refinement to come.