Originally posted by: Eatitup86
Based on what folks at NESDEV said the original NES actually runs at 60.0988 Hz while alternatives such as the AVS & Hi-Def NES run at 60 Hz due to an HDMI standard. Is this true for the AVS?
This all started when I attempted what, from what I have learned from some folks at NESDEV, was a futile project to daisy chain 2 NES controllers to play both the NES & AVS at the same time using the same game on 1 controller to compare the two with 1 to 1 input. I took 2 cheap Tomee controllers, soldered their buttons together and connected just the +5V connector from one controller to the other to power it. The results were quite strange since all buttons worked but when I press up, right, or down it adds in an additional directional input on one of the two consoles.
It's 59.94Hz, not 60. Broadcast media still runs 59.94Hz through cable, OTA, and satellite, so recievers with HDMI ouput are synced to 59.94Hz. Otherwise every 999th frame gets duplicated if the HDMI sync were 60Hz instead.
As for the controller dongles, sync, reset, and data need independent connections to each controller. I would recommend leaving the VCC signals separate between chips and use common ground if each console has it's own power. Or backdoor power both consoles through the controller port (power switch on the console side must be in off position and AC adapter disconnected) using an external 5V supply.