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Old 01 April 2019, 23:23   #23
majinga
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Join Date: Aug 2018
Location: Italy
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Quote:
Originally Posted by Daedalus View Post
The best way of dealing with it is to use a couple of 9-pin D connectors to build a simple adaptor for Amiga use, then you can still use the unmodified pad on the Megadrive. If you have a C64, you can also add some diodes to the adaptor that make it safe for C64 use too.
An adapter for MD pads already exist
https://github.com/screwbreaker/Open...rivePadAdapter

Probably more than one.

Quote:
Originally Posted by Daedalus View Post
...
I don't know enough about the Megadrive to know if it will damage it, but the risk of damage to Amiga systems of using an unmodified pad is very low. What's more likely to be an issue for Amiga use is that certain game / Kickstart combinations might not set the pin 5 level as required, resulting in the controller not getting power and therefore working.

Personally I don't really like the idea of powering peripherals from an I/O pin of Paula, so I don't do it.
The power still taken from the pin 7 of the Amiga, most probably inside the MD pad there are some protections diodes. Connecting it to the Amiga the diode to the power rail is directly biased, and the VCC go from the pin 7 of the Amiga to the pin 5 of the pad.
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