[ipminvad]+ IPM Invader

[jman]

ipminvad.xml

Code: Select all

<!-- IPM Invader (set 1) -->
<mamecheat version="1">

    <cheat desc="no hit">
        <script state="on">
            <action>maincpu.mb@1957 = 00</action>
        </script>
        <script state="off">
            <action>maincpu.mb@1957 = 25</action>
        </script>
    </cheat>

    <cheat desc="rapid fire">
        <script state="on">
            <action>maincpu.mb@270F = 00</action>
        </script>
        <script state="off">
            <action>maincpu.mb@270F = 02</action>
        </script>
    </cheat>

    <cheat desc="player speed">
        <parameter>
            <item value="0x1f">01 (slow)</item>
            <item value="0x0f">02       </item>
            <item value="0x07">03       </item>
            <item value="0x03">04       </item>
            <item value="0x00">05 (fast)</item>
        </parameter>
        <script state="on">
            <action>maincpu.mb@17C6 = param</action>
        </script>
        <script state="off">
            <action>maincpu.mb@17C6 = 03</action>
        </script>
    </cheat>

    <cheat desc="bullet speed">
        <parameter min="0x01" max="0x05" step="0x01" />
        <script state="on">
            <action>maincpu.mw@113C = 2C00            </action>
            <action>maincpu.mq@2C00 = AA682713204800A9</action>
            <action>maincpu.mq@2C08 = 00000060F6D08ACA</action>
            <!--
            2C00 | A9 xx    : lda #$xx
            2C02 | 48       : pha
            2C03 | 20 13 27 : jsr $2713
            2C06 | 68       : pla
            2C07 | AA       : tax
            2C08 | CA       : dex
            2C09 | 8A       : txa
            2C0A | D0 F6    : bne $2c02
            2C0C | 60       : rts
            -->
        </script>
        <script state="change">
            <action>maincpu.mb@2C01 = param</action>
        </script>
        <script state="off">
            <action>maincpu.mw@113C = 2713            </action>
            <action>maincpu.mq@2C00 = 0000000000000000</action>
            <action>maincpu.mq@2C08 = 0000000000000000</action>
        </script>
    </cheat>

</mamecheat>

ipminvad1.xml. This set works in 0.274 because of dumped ROM.

Code: Select all

<!-- IPM Invader (set 2) -->
<mamecheat version="1">

    <cheat desc="no hit">
        <script state="on">
            <action>maincpu.mb@2445 = 00</action>
        </script>
        <script state="off">
            <action>maincpu.mb@2445 = 2E</action>
        </script>
    </cheat>

    <cheat desc="rapid fire">
        <script state="on">
            <action>maincpu.mb@2330 = 00</action>
        </script>
        <script state="off">
            <action>maincpu.mb@2330 = 02</action>
        </script>
    </cheat>

    <cheat desc="player speed">
        <parameter>
            <item value="0x1f">01 (slow)</item>
            <item value="0x0f">02       </item>
            <item value="0x07">03       </item>
            <item value="0x03">04       </item>
            <item value="0x00">05 (fast)</item>
        </parameter>
        <script state="on">
            <action>maincpu.mb@16EB = param</action>
        </script>
        <script state="off">
            <action>maincpu.mb@16EB = 03</action>
        </script>
    </cheat>

    <cheat desc="bullet speed">
        <parameter min="0x01" max="0x05" step="0x01" />
        <script state="on">
            <action>maincpu.mw@115C = 2BE0            </action>
            <action>maincpu.mq@2BE0 = AA682334204800A9</action>
            <action>maincpu.mq@2BE8 = 00000060F6D08ACA</action>
            <!--
            2BE0 | A9 xx    : lda #$xx
            2BE2 | 48       : pha
            2BE3 | 20 34 23 : jsr $2334
            2BE6 | 68       : pla
            2BE7 | AA       : tax
            2BE8 | CA       : dex
            2BE9 | 8A       : txa
            2BEA | D0 F6    : bne $2be2
            2BEC | 60       : rts
            -->
        </script>
        <script state="change">
            <action>maincpu.mb@2BE1 = param</action>
        </script>
        <script state="off">
            <action>maincpu.mw@115C = 2334            </action>
            <action>maincpu.mq@2BE0 = 0000000000000000</action>
            <action>maincpu.mq@2BE8 = 0000000000000000</action>
        </script>
    </cheat>

</mamecheat>

"bullet speed" is very hard to control speed. Sometimes bullet doesn't hit object when you set faster speed. So 0x02 may be "better" speed.