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Wonderboy in Monster World EEPROM to SRAM patch
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SmartOne



Joined: 04 Sep 2007
Posts: 42

PostPosted: Fri Aug 13, 2010 3:37 am    Post subject: Wonderboy in Monster World EEPROM to SRAM patch Reply with quote

Does this exist? How difficult?

And is there a way to map games to the SRAM pages in ucon64?

( Download IPS Patch: http://www.tototek.com/phpBB2/viewtopic.php?p=16722#16722 )
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MottZilla



Joined: 08 Sep 2004
Posts: 765

PostPosted: Fri Aug 13, 2010 4:48 am    Post subject: Reply with quote

I have no idea if it exists. It probably isn't terribly difficult if you are experienced with the 68000 cpu and have some access to Genesis hardware documents. But if you aren't experienced with the 68000, it's near impossible.
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haynor



Joined: 12 Jan 2010
Posts: 31
Location: Poland

PostPosted: Fri Aug 13, 2010 8:15 am    Post subject: Reply with quote

Monster World IV (japan) has been patched so it's probably possible also for this one.
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SmartOne



Joined: 04 Sep 2007
Posts: 42

PostPosted: Fri Aug 13, 2010 1:29 pm    Post subject: Reply with quote

Monster World IV already uses SRAM. The patch is a translation and region fix.

Wonderboy in Monster World uses EEPROM.
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MottZilla



Joined: 08 Sep 2004
Posts: 765

PostPosted: Sun Aug 15, 2010 3:27 am    Post subject: Reply with quote

Just to elaborate a bit. I am guessing that Wonderboy in Monster World uses Serial EEPROM for saving. The game probably has atleast two routines. One of them for taking the game state data in Genesis's RAM and writing it onto the SEEPROM and one for reading the SEEPROM and copying the data into the Genesis's RAM. So if you can find the routine (which probably writes to $200001 I think) it shouldn't be terribly hard to understand. The change you want to make is pretty simple, rather than a single stream of data into the Serial EEPROM you just want to copy it onto the SRAM chip you'll be using instead and vice versa.

Again if you don't understand 68000 machine code this won't be easy or even possible.
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SmartOne



Joined: 04 Sep 2007
Posts: 42

PostPosted: Sun Aug 15, 2010 4:35 am    Post subject: Reply with quote

Thanks for the tips. (Maybe someday...?) Too bad Wonderboy in Monster World freezes at the title screen as it tries to access nonexistent EEPROM. It would be nice if the game was at least playable.

Last edited by SmartOne on Sun Aug 22, 2010 4:26 am; edited 1 time in total
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MottZilla



Joined: 08 Sep 2004
Posts: 765

PostPosted: Sun Aug 15, 2010 5:22 am    Post subject: Reply with quote

Someday I might get to it. I just don't know when that might be, if ever. There are alot of projects I want to do but there is never enough time.
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SmartOne



Joined: 04 Sep 2007
Posts: 42

PostPosted: Sun Aug 15, 2010 3:02 pm    Post subject: Reply with quote

I meant me. (Unlikely.)
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MottZilla



Joined: 08 Sep 2004
Posts: 765

PostPosted: Fri Aug 20, 2010 7:52 pm    Post subject: Reply with quote

I looked into it a little bit today. It doesn't look like it should be that hard to find the code dealing with saving routines, and the information on how SEEPROM works is out there. Maybe if I get time I'll try to do something with it.
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cesarf_jr



Joined: 23 Sep 2010
Posts: 6
Location: Sao Paulo - Brazil

PostPosted: Thu Sep 23, 2010 11:54 pm    Post subject: Reply with quote

Are you talking about Wonder boy in Monster World, the one about Shion, etc??

i've patched it some time ago, and it worked flawlessly on my MD-PRO 64 + first japanese Mega Drive. I'll upload the rom somewhere and post the link here...
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cesarf_jr



Joined: 23 Sep 2010
Posts: 6
Location: Sao Paulo - Brazil

PostPosted: Fri Sep 24, 2010 12:34 am    Post subject: Reply with quote

here it is:

http://rapidshare.com/files/420882877/Wonder_Boy_in_Monster_World__UE___SRAM_patch_.gen

have fun!!



ps.: will someone please upload this file to some other servers and post the links here? Thanks.
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cesarf_jr



Joined: 23 Sep 2010
Posts: 6
Location: Sao Paulo - Brazil

PostPosted: Fri Sep 24, 2010 12:44 am    Post subject: Reply with quote

ps2.: don't forget to assign a save slot for the rom when flashing your md-pro
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Chilly Willy



Joined: 08 Feb 2009
Posts: 174

PostPosted: Fri Sep 24, 2010 4:28 am    Post subject: Reply with quote

cesarf_jr wrote:
here it is:

http://rapidshare.com/files/420882877/Wonder_Boy_in_Monster_World__UE___SRAM_patch_.gen

have fun!!



ps.: will someone please upload this file to some other servers and post the links here? Thanks.


Very nice! That should make some folks happy. Very Happy
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MottZilla



Joined: 08 Sep 2004
Posts: 765

PostPosted: Fri Sep 24, 2010 4:34 pm    Post subject: Reply with quote

You should consider making an IPS patch and submitting it to www.romhacking.net so more people know about it.
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cesarf_jr



Joined: 23 Sep 2010
Posts: 6
Location: Sao Paulo - Brazil

PostPosted: Sat Sep 25, 2010 5:43 am    Post subject: Reply with quote

I'm kinda lazy to register at the forum at romhacking.net .

Here's the IPS:
http://rapidshare.com/files/421120043/Wonder_Boy_in_Monster_World__UE___SRAM_patch_.ips

it should be used with the following rom dump (maybe it works with other dumps as well):

Wonder Boy in Monster World (UE) [!].bin

Feel free to upload it anywhere you think will help people Smile

ps.: rom has to be in binary format. smd won't work...
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