MiSTer FPGA Forum

Hi, Guzzard. Just wondering which pins you're measuring 1.7v between? Are you measuring the voltage between the 5v pin (pin 1?) and the led signal pins (2, 3 and 4)? Or are you measuring against pin six, which looks like it /might/ be ground on your board according to the schematics? Warning: I'm not very good at reading those. :-) Apologies if th...

There are known issues with the Retrobit 6 button and SNAC. The Retrobit is less tolerant of too tight timing loops with some Genesis ROMs Thanks for the info! Is this know issue documented somewhere or is it something I would have found out by googling and searching through forums? Would be really great to collect all these pieces of info regardi...

Ok modded the I/O board. - NES Zapper work fine - SNES original controller works fine - Mega Drive/Genesis retro-bit official 6 button Sega controller acts super wierd. In 240p test-suit I can test all buttons but when pressing start it registers almost all buttons except A and B. I tried playing Flashback, and in the menu buttons work, but in-game...

I just did the mod for the 5.6XL, using this image: There are basically 2 traces to cut, and one wire and a 100 ohms resistor to solder. My Snes and PC engine controllers work perfectly with it, however I can't get my Sega Genesis Justifier gun to work, so I'm not 100% sure it works. Thanks for the picture and info! I'll give that a try. I don't h...

The LED signals are active low. The LEDs are always powered, and "turned on" by providing the ground. When LED is off both plus and minus are at 5 V, so the potential difference is 0 V, and then LED is activated by dropping the voltage on minus to around 1.7 V making the potential difference around 3,3 V. If I understand correctly this i...

This is the modification I did to my older I/O board. I've since upgraded to the digital I/O. I've made both a USB and HDMI versions of SNAC from a UK seller. My understanding that if you have a jumper for I/O pin or the modification to your board, you can leave the jumper plugged in on the SNAC board. If you do not have this option on you IO boar...

For anyone else wondering.. 1. P5 jumper functions as expected when connecting LEDs as shown below. 2. Connected LEDs as shown below and this works fine for me. This is based on other user posted images and various forum posts. I don't know if there is any official guide or information about this? I have searched but have not been able to find any ...

I have a couple of questions regarding connecting the LEDs externally. Hopefully someone here can give me some guidance. I looked at github (io board 5.6 pdf) and in various forum posts etc but have trouble understanding how to properly hook up the LEDs. On the I/O board v. 5.6 XL: 1. P5 jumper seem to control both on-board and external LEDs? PDF i...