MottZilla wrote:
dashv wrote:
Folks I want to drive two consoles simultaneously with one controller.
The reason being I want to test various clones against the real nes with the same games to test for lag.
I have spliced 2 nes extension cables into a y adapter and quickly learned it's not as easy as that.
Has a one done this before? Tips?
Hardware clones using the "NOAC" or actual CPU and PPU clones will not have "lag". There is no need to test. These are exact (almost) clones of the circuitry in the original system. No emulation is being performed. Any "lag" one might experience would be related to their display.
Folks, thanks for all the input and suggestions. with all your help and insights I now understand why my simple splitter made from 2 extension cords (didn't want to ruin 2 controllers) will not work without additional hardware. And here I though I was clever because I was smart enough to clip the extra 5volt feed.
For additional context.
I'm comparing an original NES first to itself (another nes). Then to a Retron 5. It's emulation based not NOAC. with extra features like HDMI upscaling, graphics filters, Etc.
Input lag, display lag, and emulation performance are all possible factors.
I have 2 nes systems, 2 identical SMB 1 and Punch Out! cartridges, a CRT and a 55inch LED. I have a series of side-by-side control and variable tests planned to detect input, display, and emulation speed issues separately.
What I need to remove however is the ham handed "one guy trying to mash two buttons on two controllers simultaneously".
I'll be recording the feeds from both devices using separate DVRs with lagless passthrough and also two 5D MKIIs camera's aimed at the displays running at 30fps at high shutter to eliminate motion blur (at least from the camera). So I can do frame by frame comparisons.
Yeah it's ambitious. Probably even overkill. But everybody's gotta have a hobby, right?
Thanks again for all of the advice. It honestly sounds like the controller project may be a bit more than I can handle right now. I'd rather not take an iron to my controllers and while I'm good with replacing worn caps and dead batteries, building custom circuits is beyond my abilities at present.