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Hey folks,
I have a few updates about some cool projects to share. I designed a couple boards useful for doing Sega 8-bit mods and hacks. The first, is the Uni-Gen Converter:

This handy board demuxes a Genesis controller so you can use Start on an SMS or Game Gear (with modding). It also has auto-fire and other features.

The other board I designed is called the Multi-Use DIY board. It has debouncing, flip flop, and MUXs for doing easy switchless mods. These are great for adding import selection or overclock with the push of a button:

Please see my new website for details and ordering:
https://segasonicfan.wixsite.com/retro/

-Segasonicfan

Would it be possible to map the Start button to the Pause NMI on the SMS?

SavagePencil wrote

Would it be possible to map the Start button to the Pause NMI on the SMS?

Yep, that's one thing the board was designed for :)

Keep in mind that the SMS controller port does not have enough pins for another button, but you can make a toggle between pin 7 (TH, for lightgun games) and start if you want to use it to pause all games but lightgun games, for example.

My multi-use PCB can do this if you want to toggle with only a simple button press, mounted on/in the console (like the reset button, for example)

-Segasonicfan

Author	Message
segasonicfan Joined: 05 Jan 2006 Posts: 374 Location: USA	New PCBs available! The Uni-Gen Converter and Multi-DIY board Posted: Fri Sep 15, 2017 7:02 pm Last edited by segasonicfan on Thu May 10, 2018 10:23 pm; edited 1 time in total
	Hey folks, I have a few updates about some cool projects to share. I designed a couple boards useful for doing Sega 8-bit mods and hacks. The first, is the Uni-Gen Converter: This handy board demuxes a Genesis controller so you can use Start on an SMS or Game Gear (with modding). It also has auto-fire and other features. The other board I designed is called the Multi-Use DIY board. It has debouncing, flip flop, and MUXs for doing easy switchless mods. These are great for adding import selection or overclock with the push of a button: Please see my new website for details and ordering: https://segasonicfan.wixsite.com/retro/ -Segasonicfan

SavagePencil Joined: 23 Aug 2009 Posts: 213 Location: Seattle, WA	Posted: Wed Sep 20, 2017 10:41 pm
	Would it be possible to map the Start button to the Pause NMI on the SMS?

segasonicfan Joined: 05 Jan 2006 Posts: 374 Location: USA	Posted: Wed Sep 20, 2017 10:54 pm
	SavagePencil wrote Would it be possible to map the Start button to the Pause NMI on the SMS? Yep, that's one thing the board was designed for :) Keep in mind that the SMS controller port does not have enough pins for another button, but you can make a toggle between pin 7 (TH, for lightgun games) and start if you want to use it to pause all games but lightgun games, for example. My multi-use PCB can do this if you want to toggle with only a simple button press, mounted on/in the console (like the reset button, for example) -Segasonicfan

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