Sega genesis to 25pin printer port via PPJOY. Has anyone done this?

[delta88]

http://www.instructables.com/id/Build-Sega-Genesis-Controller-Ports-for-your-PC/step2/The-schematic/

I've wired up everything except the 5vdc. Based on the image I have all of the diodes in place but I am left wondering if I should be injecting the 5VDC into the controller and the 25 pin port or just one or the other. 

Any of  you takin this project on?

[delta88]

Well it looks like you run it to the both.

Its almost perfect but once into windows it thinks a few buttons are still pressed. Possibly after the next version that is connector-less (built in to the sega) it may work even better.



In the end it should be a sega model 1 with working headphone port out the front. power plug is in the original spot. There should be VGA, s-vid and composite video out as well as either left and right channel out or just another headphone jack out the rear.
built in wifi and possibly bluetooth if ya want to use a kbrd/mouse with it. Maybe a rear mount USB. Plenty of room in the case so it should be pretty awesome in the end.

The motherboard is already fit into the case. Already sourced a sub $20.00 video conversion box that should fit inside the case.

[SavannahLion]

The schematic is showing the +5v being sourced from the port directly. There is no outside voltage being applied. I'm too lazy to look up the parallel port specification but the diodes are probably there to avoid a direct short to ground should one of the pins ever be held low.

[delta88]

Hmm, The schematic reads kinda funky IMO but it will work regardless. pwr, no pwr. Only thing I have noticed is that once it is all set up it reads as if buttons 5 and 6 are pressed all the time. for the time being I have disabled them in the layout but If I want to tr y a 6 button Imma neeed um.

[SavannahLion]

Ive been up nearly 24 hours so I'm a little exhausted so my thinking might slightly off.

If you're supplying power to the Genie, there's no need for the diodes nor the connections from the printer port. Just don't connect them. While the schematic appears useful (dont know if its correct) the instructable is lame as it goes into wire color description which is absurd to even do.

The 6 button controller is well documented and doesn't behave in exactly the same way as the three button. If the software is expecting a six button, I can't say its smart enough to realize what you have connected.

[delta88]

 I got both 3 and six to work. New question is how to setup a second controller in the ppjoy/ntpadxp side. Wiring is good. Even made another that's just a cable. Looks pretty good.