NES & SNES Classic Edition (Mini) ROMS

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zcal
Posts: 35
Joined: 23 Nov 2019 05:19

Re: NES & SNES Classic Edition (Mini) ROMS

Post by zcal »

Not sure if this is the right topic for this question, but is it really preferable to list dumps in the DoM as being from the mini console if they've been patched with SPC data from another dump? Wouldn't it be more appropriate to list dumps that were gotten without requiring the use of another ROM, like what you get from wheatevo's wiiu-vc-extractor? I wouldn't expect that such dumps would be considered "clean", but would have a status similar to an overdump or something to signify that the dumping tool/technique didn't create a true representation of the data but modified it in some way. Pulling data from another dump to patch these ROMs and then labelling the dump as being from the mini console just seems misleading.
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dreimer
Posts: 136
Joined: 14 Nov 2015 13:26

Re: NES & SNES Classic Edition (Mini) ROMS

Post by dreimer »

zcal wrote: 14 Jun 2020 05:35 Not sure if this is the right topic for this question, but is it really preferable to list dumps in the DoM as being from the mini console if they've been patched with SPC data from another dump? Wouldn't it be more appropriate to list dumps that were gotten without requiring the use of another ROM, like what you get from wheatevo's wiiu-vc-extractor? I wouldn't expect that such dumps would be considered "clean", but would have a status similar to an overdump or something to signify that the dumping tool/technique didn't create a true representation of the data but modified it in some way. Pulling data from another dump to patch these ROMs and then labelling the dump as being from the mini console just seems misleading.
We had a very similar one already. My reply to that:
http://forum.no-intro.org/viewtopic.php ... 807#p23807

We have a few ways to verify that these rebuild ROMs are the last state where they still were in SFC format and not one of the SFROM formats being used in the last step.
#1 Checksum. The internal checksum became 100% fine by doing the rebuilt.
#2 identical to later releases like Switch Online.

I would call that one a format conversion SFROM -> SFC
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zcal
Posts: 35
Joined: 23 Nov 2019 05:19

Re: NES & SNES Classic Edition (Mini) ROMS

Post by zcal »

dreimer wrote: 14 Jun 2020 09:34We had a very similar one already. My reply to that:
http://forum.no-intro.org/viewtopic.php ... 807#p23807
Thanks. I replied in the other topic.
relax
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Joined: 27 May 2008 17:52

Re: NES & SNES Classic Edition (Mini) ROMS

Post by relax »

dreimer wrote: 08 Jun 2020 13:58 JADE.sfc = Legend of Zelda.sfc -> BAD Checksum, 1 Byte diff to 2024_e.sfc on Switch Online, identical to mnml's Wii VC rebuild (no transfer error that time ^^)
Comparing the retail US ROM to the Switch and VC/Mini ones, Switch is one byte closer to retail. So Nintendo unhacked one byte for the Switch release. I wonder why. Perhaps both ROMs should be added. We have multiple dump sources for both ROMs.
relax
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Re: NES & SNES Classic Edition (Mini) ROMS

Post by relax »

dreimer wrote: 08 Jun 2020 13:58 JACE.sfc = Donkey Kong Country.sfc -> BAD Checksum, Not yet on Switch Online and thus not verifyable...
Donkey Kong Country from Switch Online is identical to Classic Edition and mnml 's VC restored ROM https://hastebin.com/raw/oliqidipol.

Code: Select all

----| File Data |--------------------------------------------------
System:             Nintendo Super Famicom / Super Nintendo Entertainment System
File:               2055_e.sfc
Length:             4194304 Bytes (32 Mbit)
CRC32:              CAF432AA
MD5:                0CB7BB0387E0464EC0CFCE6355BE3511
SHA1:               F7223A087CCA2C8D5BBF91C0BCC2D077DE6606FA
SHA256:             28D8EC792835F5C6041C3E701DA482A4F47A5E7E96FC7F9B61E693A07FAFE402
----| Detection Data |---------------------------------------------
ROM Type:           HiROM
Cartridge Type:     Normal
----| Header Data |------------------------------------------------
New Maker Code:     01 (Nintendo)
Serial:             8X   (Unknown)
SFX SRAM Size:      0x00
Title:              DONKEY KONG COUNTRY  
Map Type:           0x31 (FastROM-120ns; HiROM-64KB Banks)
ROM Type:           0x02 (ROM + Save RAM)
ROM Size:           0x0C (32 Mbit; Ok)
SRAM Size:          0x01 (16 Kbit)
Country:            0x01 (USA)
Old Maker Code:     0x33 (N/A)
Version:            0x02 (v1.2)
Inverse Checksum:   0xD433 (Bad; 0xD08D)
Checksum:           0x2BCC (Bad; 0x2F72)
-------------------------------------------------------------------
relax
High Council
Posts: 881
Joined: 27 May 2008 17:52

Re: NES & SNES Classic Edition (Mini) ROMS

Post by relax »

dreimer wrote: 13 Jun 2020 14:25 (JACJ.rom) "Super Donkey Kong (Japan) (Rev 1)" BAD Checksum, Not yet on Switch Online and thus not verifyable...
The Japanese ROM from Switch Online also matches Classic Mini and mnml 's VC restored ROM https://hastebin.com/raw/oliqidipol.

Code: Select all

----| File Data |--------------------------------------------------
System:             Nintendo Super Famicom / Super Nintendo Entertainment System
File:               2055_j.sfc
Length:             4194304 Bytes (32 Mbit)
CRC32:              ECA2C2D1
MD5:                E07B40854A1947EF38951D8E2CEAC3BD
SHA1:               8078B1D386CEEB2CEC4B4783AB6424938D47BBE9
SHA256              4807E4273D876B3B37F49E36E3B8AA5998DDEB7E77A2DB6E1138409A36C4940E
----| Detection Data |---------------------------------------------
ROM Type:           HiROM
Cartridge Type:     Normal
----| Header Data |------------------------------------------------
New Maker Code:     01 (Nintendo)
Serial:             8X   (Unknown)
SFX SRAM Size:      0x00
Title:              SUPER DONKEY KONG    
Map Type:           0x31 (FastROM-120ns; HiROM-64KB Banks)
ROM Type:           0x02 (ROM + Save RAM)
ROM Size:           0x0C (32 Mbit; Ok)
SRAM Size:          0x01 (16 Kbit)
Country:            0x00 (Japan)
Old Maker Code:     0x33 (N/A)
Version:            0x01 (v1.1)
Inverse Checksum:   0x7FA6 (Bad; 0x7C00)
Checksum:           0x8059 (Bad; 0x83FF)
User avatar
dreimer
Posts: 136
Joined: 14 Nov 2015 13:26

Re: NES & SNES Classic Edition (Mini) ROMS

Post by dreimer »

Huh? Did I miss a update?? Looks like I have something to do that weekend then ^^

EDIT: Updated
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