View Full Version : Everdrive MD and bomber raid: broken controls
I used to play bomber raid for SMS as a child.
The game loads and works fine with everdriveMD and pal megadrive except the controls: the game acts like if UP D-pad button was pushed all the time although it is not. Pretty annoying for a vertical shooter.
Can anyone confirm this behaviour, and if so, is there a fix for it?
03-14-2011, 09:22 PM
I'm not completely sure if this would be your issue, but I know many Sega Master games to work properly on a genesis need a master system controller. At least this applies to converters i believe the everdrive works similarly.
03-15-2011, 04:52 AM
Yep its definitely one of the few games that needs a Master System controller. You can modify a Megadrive controller though, by either cutting or putting a switch on the controllers pause button line.
You could also patch the game so it does not send bad command to MD controller.
To understand, this type of controller actually switches data returned depending on command bit send on the port. When 1 is written, control pad returns B & C buttons status along with directional buttons status. When 0 is written, it returns A & Start buttons instead and two of the bits formerly used for directional buttons are forced to zero (which is interpreted as being pressed).
Now, some SMS games have region detection routine during startup which involves writing data to the ports: a few of them will write 0 as last data which makes MD control pad always return A & START status (now interpreted as I & II by game) and some directional buttons appearing as always pressed.
You could disassemble the ROM, find where it writes the I/O port and change the written value, not so easy unless you know what you are looking for but definitively doable.
03-15-2011, 05:00 PM
Are you using a 6 button controller? If so, try a 3 button controller. If that fails, then try a Master System controller if possible.
I am using an official megadrive 3 buttons controller. I will try the few options that were discussed here. Thanks for such torough info :). I will start looking into patching this particular game, and get a SMS controller if it fails.
03-15-2011, 06:28 PM
yes, the game works that way for me too,
but i don't have a sms controller to test.
if you don't know how to look into the rom and patching i suggest you to look straight forward for the controller.
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