http://hiddenpalace.org/w/api.php?action=feedcontributions&feedformat=atom&user=AndlabsHidden Palace - User contributions [en]2026-04-07T12:18:13ZUser contributionsMediaWiki 1.39.6http://hiddenpalace.org/w/index.php?title=Talk:F-22_Interceptor_(Sep_17,_1991_build)&diff=82017Talk:F-22 Interceptor (Sep 17, 1991 build)2022-12-23T03:48:35Z<p>Andlabs: </p>
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<div>This is fully identical to the final <tt>F-22 Interceptor - Advanced Tactical Fighter (USA, Europe) (September, 1991).md</tt> ROM. What's happening is that this game is doing something unusual for the Mega Drive: it only maps odd bytes above the 512KB mark — presumably by using an 8-bit 128KB ROM in that space, with open bus on the even bytes. When the commonly circulating final ROM was dumped, the bus was read as byte <tt>1A</tt>; in this ROM it's read as <tt>00</tt> instead. Converting those <tt>00</tt>s to <tt>1A</tt> will give you the final ROM. All regions and revisions of the game are like this and the game is specially coded to take this into account. - [[User:Andlabs|andlabs]] ([[User talk:Andlabs|talk]]) 22:47, December 22, 2022 (EST)</div>Andlabshttp://hiddenpalace.org/w/index.php?title=Talk:F-22_Interceptor_(Sep_17,_1991_build)&diff=82016Talk:F-22 Interceptor (Sep 17, 1991 build)2022-12-23T03:47:44Z<p>Andlabs: </p>
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<div>This is fully identical to the final <tt>F-22 Interceptor - Advanced Tactical Fighter (USA, Europe) (September, 1991).md</tt> ROM. What's happening is that this game is doing something unusual for the Mega Drive: it only maps odd bytes above the 512KB mark — presumably by using an 8-bit 128KB ROM in that space, with open bus on the even bytes. When the commonly circulating final ROM was dumped, the bus was read as byte <tt>1A</tt>; in this ROM it's read as <tt>00</tt> instead. Converting those <tt>00</tt>s to <tt>1A</tt> will give you the final ROM. All region versions of the game are like this and the game is specially coded to take this into account. - [[User:Andlabs|andlabs]] ([[User talk:Andlabs|talk]]) 22:47, December 22, 2022 (EST)</div>Andlabshttp://hiddenpalace.org/w/index.php?title=Talk:F-22_Interceptor_(Sep_17,_1991_build)&diff=82015Talk:F-22 Interceptor (Sep 17, 1991 build)2022-12-23T03:47:06Z<p>Andlabs: Created page with "This is fully identical to the final ROM. What's happening is that this game is doing something unusual for the Mega Drive: it only maps odd bytes above the 512KB mark — pre..."</p>
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<div>This is fully identical to the final ROM. What's happening is that this game is doing something unusual for the Mega Drive: it only maps odd bytes above the 512KB mark — presumably by using an 8-bit 128KB ROM in that space, with open bus on the even bytes. When the commonly circulating final ROM was dumped, the bus was read as byte <tt>1A</tt>; in this ROM it's read as <tt>00</tt> instead. Converting those <tt>00</tt>s to <tt>1A</tt> will give you the final ROM. All region versions of the game are like this and the game is specially coded to take this into account. - [[User:Andlabs|andlabs]] ([[User talk:Andlabs|talk]]) 22:47, December 22, 2022 (EST)</div>Andlabshttp://hiddenpalace.org/w/index.php?title=User:Andlabs&diff=82014User:Andlabs2022-12-23T03:32:44Z<p>Andlabs: create user page</p>
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