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- Joined: 25 Feb 2013
- Posts: 384
- Location: Osaka
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Goonies rom, byte 57?
Posted: Tue Apr 26, 2022 8:17 am
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Does anyone have The Goonies rom? (crc32 40414556).
I am interested in knowing the value of the 58th byte(address $0057).
Specifically, is it either $76 or $1A?
and how about The Circuit (crc32 1df0fc90) ?
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- Site Admin
- Joined: 08 Jul 2001
- Posts: 8644
- Location: Paris, France
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Posted: Tue Apr 26, 2022 3:54 pm
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kamillebidan wrote Does anyone have The Goonies rom? (crc32 40414556).
I am interested in knowing the value of the 58th byte(address $0057).
Specifically, is it either $76 or $1A?
and how about The Circuit (crc32 1df0fc90) ?
Best than answering I suspect you are asking for a good reason (did you dump a variation of it?), can you clarify?
There are probable variations, the standalone one I dumped (not released yet) may not match the one in compilation. I even dumped another standalone that was different (need to investigate why it's not in the release queue). I'll check those soon.
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- Joined: 14 Oct 2008
- Posts: 508
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Posted: Wed Apr 27, 2022 5:21 am
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I'm guessing it's an MSX port.
Do those ports usually have some form of hacked-up MSX BIOS grafted on to them?
(I imagine that's probably less ROM hacking work than actually re-coding the game proper.)
I would imagine that might depend on which BIOS the maker of that copy used as a donor.
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- Joined: 25 Feb 2013
- Posts: 384
- Location: Osaka
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Posted: Wed Apr 27, 2022 8:39 am
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Bock wrote
Best than answering I suspect you are asking for a good reason (did you dump a variation of it?), can you clarify?
There are probable variations, the standalone one I dumped (not released yet) may not match the one in compilation. I even dumped another standalone that was different (need to investigate why it's not in the release queue). I'll check those soon.
I am trying to define a simple way to find out which roms require mapper 15, using meka's notation. At the moment, it seems the condition
rom[57]==0x76 || rom[57]==0x1A
is sufficient to discriminate these roms from other known sg-1000 roms.
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- Site Admin
- Joined: 08 Jul 2001
- Posts: 8644
- Location: Paris, France
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Posted: Thu Apr 28, 2022 1:25 pm
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Says $D4 here.
And the other one I have which is Korean and that I marked BAD (I forgot way) has a different structure and has $05.
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- Joined: 25 Feb 2013
- Posts: 384
- Location: Osaka
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Posted: Fri Apr 29, 2022 9:09 am
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Thank you very much. They indeed seem to be a completely different beast compared to the released ones.
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