[1942] 1942 (Revision B)

[nolberto82]

1942.xml

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  <cheat desc="Hit Anywhere">
    <script state="run">
      <action>maincpu.mb@3485=00</action>
      <action>maincpu.mb@34B0=86</action>
      <action>maincpu.mb@34F1=3A</action>
      <action>maincpu.mb@34FA=86</action>
      <action>maincpu.mb@3534=3A</action>
      <action>maincpu.mb@356C=86</action>
      <action>maincpu.mb@3588=C6</action>
    </script>
  </cheat>

[Pugsy]

Thanks, added - though I've not duplicated for the clones which seem to be offset by either +4 or +2

[jman]

Sorry, bumped old thread.

But any ROM codes cause ROM error around middle level.
In the official database based on 0.264, the following are ROM codes.

• Hit Anywhere
• Select Player Speed
• Select Shot Speed

Also Wayder's database has ROM code called "Always get 100%".

Someone post about ROM error for 1942 with cheat.

• https://mametesters.org/view.php?id=6751
• https://forum.mamedev.org/viewtopic.php?p=2797

Original poster misunderstand. It's not any BUGs. in-game ROM check routine detects that ROM is tampering by cheat system. So it's correct behavior.

Solution is simple, you don't use any ROM codes or disable in-game ROM check routine.
I post the codes based on the latter thinking.

1942.xml

Code: Select all

    <cheat desc="Skip In-game ROM Check">
        <script state="on">
            <action>temp0 = maincpu.mb@711A</action>
        </script>
        <script state="run">
            <action>maincpu.mb@711A = 18</action>
        </script>
        <script state="off">
            <action>maincpu.mb@711A = temp0</action>
        </script>
    </cheat>

1942a.xml, 1942abl.xml, 1942h.xml, 1942b.xml, 1942p.xml, 1942iti.xml

Code: Select all

    <cheat desc="Skip In-game ROM Check">
        <script state="on">
            <action>temp0 = maincpu.mb@711E</action>
        </script>
        <script state="run">
            <action>maincpu.mb@711E = 18</action>
        </script>
        <script state="off">
            <action>maincpu.mb@711E = temp0</action>
        </script>
    </cheat>

1942w.xml

Code: Select all

    <cheat desc="Skip In-game ROM Check">
        <script state="on">
            <action>temp0 = maincpu.mb@7134</action>
        </script>
        <script state="run">
            <action>maincpu.mb@7134 = 18</action>
        </script>
        <script state="off">
            <action>maincpu.mb@7134 = temp0</action>
        </script>
    </cheat>