johnparker007 Posted February 18, 2022 Report Share Posted February 18, 2022 (edited) 28 minutes ago, serene02 said: I remember something Chris talked about many many years ago. That Barcrest used a lot of ‘Red Herrings’ in the chr check. Could this be the case with what you are finding on the real hardware Andrew? J On the MPU4 I've seen some routines that really seemed to jump about more than is necessary - I'm not a machine code pro, but it certainly felt like it had been intentionally obfuscated to some extent! Although thinking about it, he could've been referring to the 'dummy signatures' - on some ROMs (can't remember which right now), they have a bunch of copies of the old style sig that don't do anything, meanwhile using an alternative - might've been Blue Moon...can't check right now Edited February 18, 2022 by johnparker007 1 [ Arcade Simulator ] Pre-alpha installer: http://arcadesimulator.net | Known Issues: https://tinyurl.com/yz4uom2e | Donation info: https://tinyurl.com/yzvgl4xo [ Community Drive ] The drive: http://tinyurl.com/yckze665 [ Fruit Machine Database ] Initial google sheets (WIP): https://tinyurl.com/2c5znxzz [ Fruit Machine ROM Archive ] The archive: https://tinyurl.com/3jhzbueb [ MFME Launch ] Source code: https://github.com/johnparker007/MFMELaunch [ Oasis ] Source code: https://github.com/johnparker007/Oasis [ Sound ROM Editor ] Source code: https://github.com/johnparker007/SoundRomEditor Link to comment Share on other sites More sharing options...
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