Donor cart for Mega Man Wily Wars/Rockman Mega World
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1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.
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Donor cart for Mega Man Wily Wars/Rockman Mega World
OK, does anyone know which Genesis cart would work as a donor cart for a Mega Man: The Wily Wars or Rockman Megaworld repro? I found a guy that can flash the chips, but he doesn't know which donor cart to use, though he heard there is only one that can be used. I know Mega Man: The Wily Wars uses an uncommon save method, though I can't remember what it is (not SRAM [battery] or FRAM [like Sonic 3]). Its whatever save method isn't compatible with Kega Fusion (or at least wasn't before the newest update, haven't tried the newest one yet). If anyone has any leads, that would be great, thanks.
edit: I just remembered, it saves with EEPROM, so a donor cart would need to save with EEPROM. Genesis games are usually just the 2 chips and thats it, right? no mappers like an NES game or anything, correct? If so, any EEPROM saving game should be a candidate for this, right?
edit: I just remembered, it saves with EEPROM, so a donor cart would need to save with EEPROM. Genesis games are usually just the 2 chips and thats it, right? no mappers like an NES game or anything, correct? If so, any EEPROM saving game should be a candidate for this, right?
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SEEPROM games aren't necessarily all the same; unlike other consoles, Genesis doesn't really have a default way to decode save memory, it's up to the developer/publisher. Chances are though, it's a discrete circuit similar to NBA Jam's which uses a 74138 for decoding, a 7474 to latch output data and the SEEPROM's clock, then a 74244 to interface with the open collector I2C bus.
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The SRAM mapper is standard on all existing MD games... the EEPROM mappers very from game to game. I think there's at least 5 different EEPROM mappers (+1 that I created for my own game )...
I don't have a Rockman cart so I cannot comment on what kind of method it uses. I know that there's a version which uses regular SRAM mapper instead of EEPROM...
I don't have a Rockman cart so I cannot comment on what kind of method it uses. I know that there's a version which uses regular SRAM mapper instead of EEPROM...
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Using one of the games in that list should work, but I can't guarantee it totally. ;b/* SEGA mapper (24C01 only) */
{{"T-12046" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Megaman - The Wily Wars */
{{"T-12053" }, 0xEA80, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Rockman Mega World (J) [A] */
{{"MK-1215" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Evander 'Real Deal' Holyfield's Boxing */
{{"MK-1228" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Greatest Heavyweights of the Ring (U) */
{{"G-5538" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Greatest Heavyweights of the Ring (J) */
{{"PR-1993" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Greatest Heavyweights of the Ring (E) */
{{"G-4060" }, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Wonderboy in Monster World */
{{"00001211-00"}, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Sports Talk Baseball */
{{"00004076-00"}, 0, {7, 0x7F, 0x7F, 0x200001, 0x200001, 0x200001, 0, 0, 1}}, /* Honoo no Toukyuuji Dodge Danpei */
Edit: At least for the nonvolatile memory. For the same ROM size..."Greatest Heavyweights of the Ring" should be what you want.
Before you go hunting down obscure carts, try checking out this post, in which Mottzilla hacked the Wily Wars ROM (E) to handle regular SRAM saving:
http://assemblergames.com/forums/showthread.php?t=21501
http://assemblergames.com/forums/showthread.php?t=21501
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awww, that patch is sweet! what carts could I use if I got the patched version flashed to some chips? Also, how do I install the patch? I'm on a mac so I can't try it just yet, is it a double click and that's it type thing? I actually think a copy of "greatest heavyweights" is sitting for 99¢ at play n trade right now, and I doubt anyone is in a rush to buy it, you think I should try that instead?