Dreamcast Widescreen Hacks

Can you guys make a code for NFL 2k2, NBA 2k2, and WSB 2k2? That would be epic since these games are back online

 

Really interesting topic, I have a GDEMU and thought I could just use a hex editor and make changes in the image, but that doesn't seem to work.

I've used Virtua Tennis (from here https://segaretro.org/List_of_Dreamcast_Widescreen_Codes) as an example. There was 1 instance which I replaced, but it doesn't give me widescreen.

Could somebody educate this noob please?

 

If the image is in 2352 bytes/sector (bin file) then it has error correction code. Your modification is probably treated as an error and corrected at read time. To fix that, use iso tracks. One way to do that is to gdishrink your dump.

 

Doesn't GDEMU ignore error correction? I've modified sectors before and didn't have to update the ECC.

 

I really don't know. It is possible though.

 

Alien Front Online v1.000 (2001)(Sega)(NTSC)(US)

track03

Code:

find
09000900 09000900 0000008D 20D8008C
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000

replace
09000900 09000900 0000008D 20D8008C
10933034 04890E93 30340489 06A00900
07D301A0 090007D3 04D23222 02D32B43
09000900 723CAB2A E0A00D0C B820CA0C
0000A043 00007043

track05

Code:

find
609A0D0C 58FF7F3F 9A99993E E0A00D0C

replace
609A0D0C 58FF7F3F 9A99993E 20B8000C

Code:

find
E0A00D0C 52F71E0C 84CA250C E62FD62F

replace
20B8000C 52F71E0C 84CA250C E62FD62F

 

How did you find those?

 

Thanks for the replies!

@Megavolt, yours are hex codes right? Is there a list somewhere of your findings or do we have to scroll through this topic?

 

It's a find/replace operation to be done on the files themselves. The bytes are expressed in hexadecimal.

 

emulator with debuger and IDA

 

Sonic Adventure v1.003 (1999)(Sega)(PAL)(M5)

track03

Code:

find
00E44A93 04E0D7FE 08E0322A 4693F7FE

replace
00E44A93 04E0F7FE 08E0322A 4693F7FE

two times

Code:

find
322BAFBD 0900BDBD 00E43493 04E0D7FE

replace
322BAFBD 0900BDBD 00E43493 04E0F7FE

two times

Code:

find
24F5888C 58F5888C 5CF5888C 0000FA43

replace
24F5888C 58F5888C B04C018C 0000FA43

Code:

find
37F442C7 4AF34AF2 08F342C7 3AF44AF1

replace
37F442C7 4AF30B42 08F342C7 3AF44AF1

two times

Code:

find
00090009 00090009 00090009 00090009 941E168C

replace
01D22113 0B000900 6666A63F 00090009 941E168C

 

Can someone give another try with Sega Extreme Sports?

 

Sonic Shuffle v1.000 (2001)(Sega)(PAL)(M4)

track03

Code:

find
224F6B90 0C3F37D4 1CE09DF4 47F420E0

replace
224F6B90 0C3F37D4 1CE09DF4 0B4420E0

Code:

find
C0000000 300B118C 0000FA43 600B118C

replace
C0000000 D093028C 0000FA43 600B118C

Code:

find
00000000 00000000 00000000 00000000
07D34223 07D22260 02CB0222 0B0000E0

replace
01D402DB 0B00B714 300B118C 0000403F
07D34223 07D22260 02CB0222 0B0000E0

 

Super Runabout v1.002 (2000)(Virgin)(PAL)

track23

Code:

find
2AF450F4 1414A3F4 2FD320E0

replace
20E050F4 1414A3F4 2FD33224

 

Zombie Revenge v1.000 (2000)(Sega)(PAL)(M4)

track03

Code:

find
58F323D6 52F38DF4

replace
7CF323D6 52F38DF4

 

TimeStalkers v1.003 (2000)(Sega)(PAL)(M4)

track03

Code:

find
E0EF148C E4EF148C E8EF148C 00002044

replace
E0EF148C E4EF148C E8EF148C 0000F043

Code:

find
4AF34AF2 08F342C7 3AF44AF1 08F36C97

replace
0B434AF2 08F342C7 3AF44AF1 08F36C97

Code:

find
18F0148C 1CF0148C A4EF148C D8EF148C

replace
18F0148C 1CF0148C A4EF148C 3001018C

Code:

find
09000900 09000900 09000900 09000900 0FFF0004

replace
02D201D3 0B002223 D8EF148C 0000403F 0FFF0004

Code:

find
0000FAC3 B881038C FC81038C 1482038C

replace
0000FAC3 B881038C 9001018C 1482038C

Code:

find
09000900 09000900 09000900 09000900 48240289

replace
02C701D2 2B4208F4 FC81038C 0000403F 48240289

 

Meggavolt could you ease share your setup?

 

sory, i'm don't understand? my software pack?
IDA , lxdream , demul , artmoney , compiler sh-elf

 

I think he'd like a detailed example/tutorial.

 

Megavolt I told a lot of time already but you are great !