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Mega Drive/Genesis / Bomboy level layout weirdness
« on: June 16, 2015, 01:05:28 AM »
So thanks to this post from Lunatic Obscurity, I discovered something really weird about Gamtec's Bomboy-- or at least the dump that's currently circulating around the internet, anyway (md5sum = c5816740d93932870c5c466ea2931a4f).
Specifically-- through some quirk of programming that I'm not fluent enough in Mega Drive assembly to even begin to comprehend, the level layouts are completely different depending on which emulator is used. And even weirder, none of these match the introductory demo, which is consistent across emulators.
Attaching some screenshots to show what exactly is going on, because this is definitely interesting.
Edited to add: Versions used: RetroArch "stable" cores (v1.0.0.2), though I checked the latest nightlies and they produce the same result; Kega Fusion 3.63i; Genesis Plus 1.3.0 (all under Mac OS X).
Edit #2: Naturally, none of these emulated versions-- including the demo!-- match the layout shown on actual hardware (via Nusutto's footage).
Attachments:
Specifically-- through some quirk of programming that I'm not fluent enough in Mega Drive assembly to even begin to comprehend, the level layouts are completely different depending on which emulator is used. And even weirder, none of these match the introductory demo, which is consistent across emulators.
Attaching some screenshots to show what exactly is going on, because this is definitely interesting.
Edited to add: Versions used: RetroArch "stable" cores (v1.0.0.2), though I checked the latest nightlies and they produce the same result; Kega Fusion 3.63i; Genesis Plus 1.3.0 (all under Mac OS X).
Edit #2: Naturally, none of these emulated versions-- including the demo!-- match the layout shown on actual hardware (via Nusutto's footage).
Attachments: