2012.10.06 星际战机（Star Fighter）加入模拟行列。 An update on my ongoing efforts to defeat the protection in the remaining SunA games. After Brick Zone (see previous post), another game has capitulated... Star Fighter, an obscure vertical shooter from 1990. The protections involve: different encryption of data and opcodes, address line scrambling (controllable at run time), sound latch and RAM writes disable, sprite and ROM bank latching, mirroring, NMI disable. Plus some other stuff I've patched out. If the protection checks or the ROM checksum tests carried out throughout the game fail you get: invisible/wrong enemy waves, crash on level 1 boss, random flipping of background tiles, corrupt game state, wrong random sound codes, no enemies after continue, wrong sprite bank, stuck player, etc. In addition to this, the video hardware emulation needed a little tweaking on the tiles banking part too, for good measure. Anyway here are screen shots of the 8 levels of the game played from start to end (pretty hard by the way, had to cheat with infinite lives): 　　 图多，请至来源处浏览。 ______________________________________________________________________________ 来源：http://www.lucaelia.com/mame.php/2012/Battle-for-the-Sun-A -- ポーラステーション http://perryt0517.wordpress.com/ --

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