[umk3] Ultimate Mortal Kombat 3 (rev 1.2) - subway crash fix on scorpion's pack fatal

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tehdrewsus
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[umk3] Ultimate Mortal Kombat 3 (rev 1.2) - subway crash fix on scorpion's pack fatal

Postby tehdrewsus » Tue Nov 28, 2017 6:21 pm

Greetings! Long time reader and this is my first cheat, although I have been extensively working on UMK3 for a while, completing and updating it.

After 22 years of the game crashing when Scorpion's Pack Fatality is performed on the subway, I've fixed it!

The way this breaks down is that there is a memory resource conflict, essentially. The video here explains it some: https://www.youtube.com/watch?v=gJXKfSpJTVQ

The code modification in the cheat, which I tested and is working as far as I can tell, modified the memory addresses that the game writes to on some assets for the subway stage, and the light flickering routine. There is also some custom code written for the memory "clear-out" routine that occurs between rounds to include these new memory addresses.

Happy Hacking!

Drew

Code: Select all

<cheat desc="Stop Game reset with pack fatality in subway">
    <comment>This causes the game to not crash when Scorpion's Pack Fatality is performed on the Subway stage</comment>
    <script state="run">
      <action>maincpu.mw@002BE18=DE90</action>
      <action>maincpu.mw@002BE48=DEF0</action>
      <action>maincpu.mw@002BEBC=DEF0</action>
      <action>maincpu.mw@002BECE=DEF0</action>
      <action>maincpu.mw@002BF1E=DE90</action>
      <action>maincpu.mw@002C086=DEF0</action>
      <action>maincpu.mw@002C0B8=DEF0</action>
      <action>maincpu.mw@002C0BE=DE90</action>
      <action>maincpu.mw@002C0E2=DEF0</action>
      <action>maincpu.mw@002C0F2=DE90</action>
      <action>maincpu.mw@002CCD2=C080</action>
      <action>maincpu.mw@002CCD4=1200</action>
      <action>maincpu.mw@002CCD6=FFE0</action>
      <action>maincpu.mw@00C0240=0781</action>
      <action>maincpu.mw@00C0242=DBD0</action>
      <action>maincpu.mw@00C0244=0105</action>
      <action>maincpu.mw@00C0246=0781</action>
      <action>maincpu.mw@00C0248=DE90</action>
      <action>maincpu.mw@00C024A=0105</action>
      <action>maincpu.mw@00C024C=0781</action>
      <action>maincpu.mw@00C024E=DEF0</action>
      <action>maincpu.mw@00C0250=0105</action>
      <action>maincpu.mw@00C0252=C080</action>
      <action>maincpu.mw@00C0254=66C0</action>
      <action>maincpu.mw@00C0256=FF96</action>    
    </script>
    <script state="off">
      <action>maincpu.mw@002BE18=DB90</action>
      <action>maincpu.mw@002BE48=DBF0</action>
      <action>maincpu.mw@002BEBC=DBF0</action>
      <action>maincpu.mw@002BECE=DBF0</action>
      <action>maincpu.mw@002BF1E=DB90</action>
      <action>maincpu.mw@002C086=DBF0</action>
      <action>maincpu.mw@002C0B8=DBF0</action>
      <action>maincpu.mw@002C0BE=DB90</action>
      <action>maincpu.mw@002C0E2=DBF0</action>
      <action>maincpu.mw@002C0F2=DB90</action>
      <action>maincpu.mw@002CCD2=0781</action>
      <action>maincpu.mw@002CCD4=DBD0</action>
      <action>maincpu.mw@002CCD6=0105</action>
      <action>maincpu.mw@00C0240=FFFF</action>
      <action>maincpu.mw@00C0242=FFFF</action>
      <action>maincpu.mw@00C0244=FFFF</action>
      <action>maincpu.mw@00C0246=FFFF</action>
      <action>maincpu.mw@00C0248=FFFF</action>
      <action>maincpu.mw@00C024A=FFFF</action>
      <action>maincpu.mw@00C024C=FFFF</action>
      <action>maincpu.mw@00C024E=FFFF</action>
      <action>maincpu.mw@00C0250=FFFF</action>
      <action>maincpu.mw@00C0252=FFFF</action>
      <action>maincpu.mw@00C0254=FFFF</action>
      <action>maincpu.mw@00C0256=FFFF</action>
    </script>
</cheat>
Project: UMK3 Revision 1.3 - Update to 1.2, completing the game and addressing bugs/glitches.
I fixed the Subway stage crash with Scorpion's Pack fatality! https://www.youtube.com/watch?v=gJXKfSpJTVQ
Check out the current public beta for Revision 1.3! Download link and changelog in video description: https://www.youtube.com/watch?v=6uQ2WlTTp3s

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Pugsy
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Re: [umk3] Ultimate Mortal Kombat 3 (rev 1.2) - subway crash fix on scorpion's pack fatal

Postby Pugsy » Sun May 06, 2018 6:30 pm

Thanks, nice work. Added.
Pugsy

Servicing your cheating needs since 1985 ;-)

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MAME 0.199 XML cheat collection 7 JULY 2018) from http://www.mamecheat.co.uk or direct from:-
http://www.mediafire.com/file/v06mc7gmk ... at0199.zip (ZIP Archive 1883 KB)