CAVE | Do-Donpachi Dai-Ou-Jou Black Label – Reverse Engineered

Today over at the shmups forums a new post caught my eye. Check out the added content in the Player 2 bomb stock below:

Hack Label

A forum regular “austere” has reverse-engineered the game from top to bottom, and made a patch available for those who wants to try it out:

This is a modified version of DOJBL I call DOJBL+, which should be able to run on DOJBL boards and a modified version of MAME I’ve included below (with changes to source noted). If you hold A while pushing start to select a ship, it will run in “plus mode” which will display your hyper rank (“HR”), standard rank (“SR) and current frame number (“FN”) when the game begins. I have no plans for additional modifications for now, except possibly replacing the frame number with bullet speed. Anyway you can grab the patch (obviously the romset is not included) and the modified version of MAME 141u1 here:

Patch for DOJBL+:

There’s also an unfinished technical guide, which should interest all DOJBL players and will finally reveal everything about hyper rank:

I will be updating it soon to cover standard rank, slow down, hyper gauge and whatever you guys want to suggest. I don’t like sharing unfinished work, but I’m dumping some stuff here so that I can get my mind off this for a while.

Oh yeah, when the other dude releases his hacked version, I will consider allowing this version to skip the NVRAM check. The reason why I don’t want to do this just yet is because not all the DOJ versions have been dumped and it would thus be ideal to avoid extinction of white label boards due to this modification. Of course, it’s easy to identify because it boots straight into black label but I’ll play it safe for now.

In addition to just adding stuff to the game engine like this, it opens up for lots of other neat stuff, but check out shmups forums for more on the subject:

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