[megrescu] Megumi Rescue

[jman]

megrescu will be added in 0.245 so that I create basic RAM cheats.

Code: Select all

<cheat desc="infinite credit">
    <script state="run">
        <action>maincpu.pb@c000 = 99</action>
    </script>
</cheat>

<cheat desc="infinite life">
    <script state="run">
        <action>maincpu.pb@c02d = 09</action>
    </script>
</cheat>

<cheat desc="always have power up">
    <comment>player gfx and music don't change</comment>
    <script state="run">
        <action>maincpu.pb@c702 = 02</action>
    </script>
</cheat>

<cheat desc="finish current level now (rescue)">
    <script state="on">
        <action>maincpu.pb@c5de = 00</action>
    </script>
</cheat>

This game has 3 patterns to finish level.

• Rescue all people.
• Put out all fire.
• Catch helicopter to go to challenge stage.

I find "people" pattern but don't find "fire" and "helicopter".

The following ROM codes are WIP. Required more test.

Code: Select all

<cheat desc="keep a fireman (wip)">
    <script state="on">
        <action>maincpu.md@268a =         217e80c3</action>
        <action>maincpu.mq@7e80 = f83ac6ec22fa8021</action>
        <action>maincpu.mq@7e88 = 3e052801fe0fe6c6</action>
        <action>maincpu.mq@7e90 = c3ec0021c6f83210</action>
        <action>maincpu.mq@7e98 = ffffffffffff26a4</action>
        <!--
        7e80 | 21 80 fa : ld  hl,$FA80
        7e83 | 22 ec c6 : ld  ($C6EC),hl
        7e86 | 3a f8 c6 : ld  a,($C6F8)
        7e89 | e6 0f    : and $0F
        7e8b | fe 01    : cp  $01
        7e8d | 28 05    : jr  z,$7E94
        7e8f | 3e 10    : ld  a,$10
        7e91 | 32 f8 c6 : ld  ($C6F8),a
        7e94 | 21 00 ec : ld  hl,$EC00
        7e97 | c3 a4 26 : jp  $26A4
        -->
    </script>
    <script state="off">
        <action>maincpu.md@268a =         21c5f432</action>
        <action>maincpu.mq@7e80 = ffffffffffffffff</action>
        <action>maincpu.mq@7e88 = ffffffffffffffff</action>
        <action>maincpu.mq@7e90 = ffffffffffffffff</action>
        <action>maincpu.mq@7e98 = ffffffffffffffff</action>
    </script>
</cheat>

<cheat desc="auto fire (wip)">
    <script state="on">
        <action>maincpu.mq@24fc = 794328c0e6c1483a</action> <!-- ld a,($C148) / and $C0 -->
    </script>
    <script state="off">
        <action>maincpu.mq@24fc = 7943280fe6c1473a</action>
    </script>
</cheat>

<cheat desc="fast fire fighting (wip)">
    <script state="on">
        <action>maincpu.mb@291d = 01</action>
        <action>maincpu.mb@2951 = 01</action>
    </script>
    <script state="off">
        <action>maincpu.mb@291d = 1e</action>
        <action>maincpu.mb@2951 = 3c</action>
    </script>
</cheat>

<cheat desc="power up (wip)">
    <script state="on">
        <action>maincpu.md@2673 =         ed7ea0cd</action>
        <action>maincpu.mq@7ea0 = 02fec7023ac6fa22</action>
        <action>maincpu.mq@7ea8 = ffffffc92b90cdd0</action>
        <!--
        7ea0 | 22 fa c6 : ld   ($C6FA),hl
        7ea3 | 3a 02 c7 : ld   a,($C702)
        7ea6 | fe 02    : cp   $02
        7ea8 | d0       : ret  nc
        7ea9 | cd 90 2b : call $2B90
        7eac | c9       : ret
        -->
    </script>
    <script state="off">
        <action>maincpu.md@2673 =         edc6fa22</action>
        <action>maincpu.mq@7ea0 = ffffffffffffffff</action>
        <action>maincpu.mq@7ea8 = ffffffffffffffff</action>
    </script>
</cheat>

"fast fire fighting" is unique. This code reduces the time to go out after you get in through the window.

[jman]

Code: Select all

<cheat desc="sound test mode (test)">
    <comment>reset the game (F3) to enter sound test mode</comment>
    <script state="on">
        <action>maincpu.mw@0112 =             7eb0</action>
        <action>maincpu.mq@7eb0 = c0fec1483ac20021</action>
        <action>maincpu.mq@7eb8 = 1028bffee0db1628</action>
        <action>maincpu.mq@7ec0 = 0828a7f8dbfad3af</action>
        <action>maincpu.mq@7ec8 = f03e0228103e7fcb</action>
        <action>maincpu.mq@7ed0 = 0120f0fedf2847b8</action>
        <action>maincpu.mq@7ed8 = c0fe34012010fe35</action>
        <action>maincpu.mq@7ee0 = 20bffe06187e0320</action>
        <action>maincpu.mq@7ee8 = c318f80032ff3e05</action>
        <!--
        7eb0 | 21 00 c2 : ld  hl,$C200  // sound code address
        7eb3 | 3a 48 c1 : ld  a,($C148) // read button input
        7eb6 | fe c0    : cp  $C0
        7eb8 | 28 16    : jr  z,$7ED0
        7eba | db e0    : in  a,($E0)   // read start button input
        7ebc | fe bf    : cp  $BF
        7ebe | 28 10    : jr  z,$7ED0
        7ec0 | af       : xor a
        7ec1 | d3 fa    : out ($FA),a
        7ec3 | db f8    : in  a,($F8)   // read paddle input
        7ec5 | a7       : and a
        7ec6 | 28 08    : jr  z,$7ED0
        7ec8 | cb 7f    : bit 7,a
        7eca | 3e 10    : ld  a,$10
        7ecc | 28 02    : jr  z,$7ED0
        7ece | 3e f0    : ld  a,$F0
        7ed0 | b8       : cp  b
        7ed1 | 47       : ld  b,a
        7ed2 | 28 df    : jr  z,$7EB3
        7ed4 | fe f0    : cp  $F0
        7ed6 | 20 01    : jr  nz,$7ED9
        7ed8 | 35       : dec (hl)      // decrease code
        7ed9 | fe 10    : cp  $10
        7edb | 20 01    : jr  nz,$7EDE
        7edd | 34       : inc (hl)      // increase code
        7ede | fe c0    : cp  $C0
        7ee0 | 20 03    : jr  nz,$7EE5
        7ee2 | 7e       : ld  a,(hl)    // play sound
        7ee3 | 18 06    : jr  $7EEB
        7ee5 | fe bf    : cp  $BF
        7ee7 | 20 05    : jr  nz,$7EEE
        7ee9 | 3e ff    : ld  a,$FF     // stop sound
        7eeb | 32 00 f8 : ld  ($F800),a // send sound code
        7eee | 18 c3    : jr  $7EB3
        -->
    </script>
    <script state="run">
        <output format="----- megumi rescue 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="start : 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@c200</argument>
        </output>
    </script>
    <script state="off">
        <action>maincpu.mw@0112 =            01f5</action>
        <action>maincpu.mq@7eb0 = ffffffffffffffff</action>
        <action>maincpu.mq@7eb8 = ffffffffffffffff</action>
        <action>maincpu.mq@7ec0 = ffffffffffffffff</action>
        <action>maincpu.mq@7ec8 = ffffffffffffffff</action>
        <action>maincpu.mq@7ed0 = ffffffffffffffff</action>
        <action>maincpu.mq@7ed8 = ffffffffffffffff</action>
        <action>maincpu.mq@7ee0 = ffffffffffffffff</action>
        <action>maincpu.mq@7ee8 = ffffffffffffffff</action>
    </script>
</cheat>