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Is there a trainer (infinite lives) ROM for defender 2 or defender arcade ?


5 replies to this topic

#1 ninsei OFFLINE  

ninsei

    Space Invader

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Posted Thu Oct 11, 2018 1:09 PM

Hi. Is there a trainer (infinite lives) version of defender arcade or defender 2 made?



#2 Arenafoot OFFLINE  

Arenafoot

    Stargunner

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Posted Fri Oct 12, 2018 7:56 AM

Hi. Is there a trainer (infinite lives) version of defender arcade or defender 2 made?

Not that I've ever found online. The only one I have on the "List" is the original Defender - http://atariage.com/...nlimited-lives/



#3 BassGuitari OFFLINE  

BassGuitari

    Glorified Toaster

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Posted Fri Oct 12, 2018 9:01 AM

Not that I've ever found online. The only one I have on the "List" is the original Defender - http://atariage.com/...nlimited-lives/

 

And the original Defender is so easy that it doesn't even matter. :P



#4 SpiceWare OFFLINE  

SpiceWare

    Draconian

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Posted Fri Oct 12, 2018 6:08 PM

Not difficult to make one using Stella.  By watching what happens with RAM when you die, you can see that the lives counter is stored in $82.  Issuing the command trapwrite 82 lets you find where it's decreased.
Screen Shot 2018-10-12 at 6.56.32 PM.png

 

Clicking on C6 82 then typing in EA EA will replace the dec ram_82 with a couple of NOP instructions, which don't do anything but waste time.
Screen Shot 2018-10-12 at 6.56.59 PM.png

 

Lastly typing saverom will save the modified ROM.  On my Mac it was saved to the desktop.

 

Attached File  Defender 2 Unlimited Lives.a26   8KB   25 downloads



#5 stephena ONLINE  

stephena

    River Patroller

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Posted Fri Oct 12, 2018 7:08 PM

Alternatively, add cheatcode '8203'.  This modifies RAM location $82 to always contain 3 lives.  So you don't even need to save a separate ROM; the cheat will be activated automatically when you start the game.



#6 Mr SQL OFFLINE  

Mr SQL

    River Patroller

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Posted Tue Oct 16, 2018 7:11 PM

I think a Defender II trainer would work better with a time dilation element, the extra lives help but the gameplay is too fast for a trainer. 





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