Emulator Cheats

Memory altering cheats for emulators
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[meikyuh] The Real Ghostbusters/Meikyuu Hunter G

http://www.mamecheat.co.uk/forums/viewtopic.php?t=13074

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[meikyuh] The Real Ghostbusters/Meikyuu Hunter G

Posted: Sat Dec 18, 2021 10:45 am
by jman

Code: Select all

<cheat desc="no hit">
    <script state="on">
        <action>maincpu.mb@09acd = 20</action> <!-- fire sword -->
        <action>maincpu.mb@0fa97 = 20</action> <!-- bullet -->
        <action>maincpu.mb@0a12f = 20</action> <!-- enemy -->
        <action>maincpu.mb@0da11 = 20</action> <!-- boss explosion -->
        <action>maincpu.mb@0fcb2 = 20</action> <!-- bomb explosion -->
        <action>maincpu.mb@3b794 = 20</action> <!-- trap ($7794) -->
    </script>
    <script state="off">
        <action>maincpu.mb@09acd = 25</action>
        <action>maincpu.mb@0fa97 = 27</action>
        <action>maincpu.mb@0a12f = 2d</action>
        <action>maincpu.mb@0da11 = 26</action>
        <action>maincpu.mb@0fcb2 = 26</action>
        <action>maincpu.mb@3b794 = 27</action>
    </script>
</cheat>

<cheat desc="auto fire">
    <script state="on">
        <action>maincpu.mb@39f79 = 00</action> <!-- ($5f79) -->
    </script>
    <script state="off">
        <action>maincpu.mb@39f79 = 11</action>
    </script>
</cheat>

<cheat desc="walk through wall">
    <script state="on">
        <action>maincpu.mb@a576 = 00</action> <!-- background -->
        <action>maincpu.mb@a57a = 20</action> <!-- objects -->
    </script>
    <script state="off">
        <action>maincpu.mb@a576 = 05</action>
        <action>maincpu.mb@a57a = 27</action>
    </script>
</cheat>

<cheat desc="sound test mode">
    <comment>reset the game (F3) to enter sound test mode</comment>
    <script state="on">
        <action>maincpu.mw@08832 =             7190</action>
        <action>maincpu.mq@3b190 = d711f63800d11127</action>
        <action>maincpu.mq@3b198 = f7c1fb26020a10c1</action>
        <action>maincpu.mq@3b1a0 = f726020c10c1ef26</action>
        <action>maincpu.mq@3b1a8 = 0496102006c1df26</action>
        <action>maincpu.mq@3b1b0 = 058601b7380020d8</action>
        <!--
        7190 | d7 11    : STB  $11
        7192 | f6 38 00 : LDB  $3800 // read input
        7195 | d1 11    : CMPB $11
        7197 | 27 f7    : BEQ  $7190
        7199 | c1 fb    : CMPB #$FB
        719b | 26 02    : BNE  $719F
        719d | 0a 10    : DEC  $10   // decrease code
        719f | c1 f7    : CMPB #$F7
        71a1 | 26 02    : BNE  $71A5
        71a3 | 0c 10    : INC  $10   // increase code
        71a5 | c1 ef    : CMPB #$EF
        71a7 | 26 04    : BNE  $71AD
        71a9 | 96 10    : LDA  $10   // play sound
        71ab | 20 06    : BRA  $71B3
        71ad | c1 df    : CMPB #$DF
        71af | 26 05    : BNE  $71B6
        71b1 | 86 01    : LDA  #$01  // stop sound
        71b3 | b7 38 00 : STA  $3800
        71b6 | 20 d8    : BRA  $7190
        -->
    </script>
    <script state="run">
        <output format="----- meikyu hunter g sound test mode -----" line="10" align="center" />
        <output format="left : decrease code"                        line="11" align="center" />
        <output format="right : increase code"                       line="12" align="center" />
        <output format="button 1 : play sound"                       line="13" align="center" />
        <output format="button 2 : stop sound"                       line="14" align="center" />
        <output format="----------------------------"                line="15" align="center" />
        <output format="&lt;&lt; sound code %2.2X &gt;&gt;"          line="17" align="center">
            <argument>maincpu.pb@0010</argument>
        </output>
    </script>
    <script state="off">
        <action>maincpu.mw@08832 =             606a</action>
        <action>maincpu.mq@3b190 = 0000000000000000</action>
        <action>maincpu.mq@3b198 = 0000000000000000</action>
        <action>maincpu.mq@3b1a0 = 0000000000000000</action>
        <action>maincpu.mq@3b1a8 = 0000000000000000</action>
        <action>maincpu.mq@3b1b0 = 0000000000000000</action>
    </script>
</cheat>
Different game system between ghostb and meikyuh so some codes in official package based on 0.221 don't work.
  • "always have ghosts" : not work because meikyh does not have "ghost capture".
  • "slimer" : not work. But meikyuh has "guard ball" instead of "slimer" so different address?
  • "maximum shot power" : meikyuh has 6 weapon items so maximum value is not 0x03 but 0x3f.

[meikyuh] The Real Ghostbusters/Meikyuu Hunter G (update)

Posted: Thu Dec 29, 2022 8:41 am
by jman

Code: Select all

<cheat desc="sound test mode">
    <comment>reset the game (F3) to enter sound test mode</comment>
    <script state="on">
        <action>maincpu.mw@08832 =             7190</action>
        <action>maincpu.mq@3b190 = 9711b63800911127</action>
        <action>maincpu.mq@3b198 = f7d61081fb26015a</action>
        <action>maincpu.mq@3b1a0 = 81f726015c81fd26</action>
        <action>maincpu.mq@3b1a8 = 02c01081fe2602cb</action>
        <action>maincpu.mq@3b1b0 = 10d71081ef270681</action>
        <action>maincpu.mq@3b1b8 = df2605c601f73800</action>
        <action>maincpu.mq@3b1c0 = 20ce000000000000</action>
        <!--
        7190 | 97 11    : STA  $11
        7192 | b6 38 00 : LDA  $3800 // read input
        7195 | 91 11    : CMPA $11
        7197 | 27 f7    : BEQ  $7190
        7199 | d6 10    : LDB  $10
        719b | 81 fb    : CMPA #$FB
        719d | 26 01    : BNE  $71A0
        719f | 5a       : DECB       // decrease code -01
        71a0 | 81 f7    : CMPA #$F7
        71a2 | 26 01    : BNE  $71A5
        71a4 | 5c       : INCB       // increase code +01
        71a5 | 81 fd    : CMPA #$FD
        71a7 | 26 02    : BNE  $71AB
        71a9 | c0 10    : SUBB #$10  // decrease code -10
        71ab | 81 fe    : CMPA #$FE
        71ad | 26 02    : BNE  $71B1
        71af | cb 10    : ADDB #$10  // increase code +10
        71b1 | d7 10    : STB  $10
        71b3 | 81 ef    : CMPA #$EF
        71b5 | 27 06    : BEQ  $71BD
        71b7 | 81 df    : CMPA #$DF
        71b9 | 26 05    : BNE  $71C0
        71bb | c6 01    : LDB  #$01  // stop sound
        71bd | f7 38 00 : STB  $3800 // send sound code
        71c0 | 20 ce    : BRA  $7190
        -->
    </script>
    <script state="run">
        <output format="----- meikyu hunter g sound test mode -----" line="10" align="center" />
        <output format="left : decrease code -01"                    line="11" align="center" />
        <output format="right : increase code +01"                   line="12" align="center" />
        <output format="down : decrease code -10"                    line="13" align="center" />
        <output format="up : increase code +10"                      line="14" align="center" />
        <output format="button 1 : play sound"                       line="15" align="center" />
        <output format="button 2 : stop sound"                       line="16" align="center" />
        <output format="----------------------------"                line="17" align="center" />
        <output format="&lt;&lt; sound code %2.2X &gt;&gt;"          line="19" align="center"  >
            <argument>maincpu.pb@0010</argument>
        </output>
    </script>
    <script state="off">
        <action>maincpu.mw@08832 =             606a</action>
        <action>maincpu.mq@3b190 = 0000000000000000</action>
        <action>maincpu.mq@3b198 = 0000000000000000</action>
        <action>maincpu.mq@3b1a0 = 0000000000000000</action>
        <action>maincpu.mq@3b1a8 = 0000000000000000</action>
        <action>maincpu.mq@3b1b0 = 0000000000000000</action>
        <action>maincpu.mq@3b1b8 = 0000000000000000</action>
        <action>maincpu.mq@3b1c0 = 0000000000000000</action>
    </script>
</cheat>
"sound test mode" : rewrite routine. add up/down key (code ±10).
All times are UTC+01:00
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