Dreamcast 60fps codes

tested with the three tosec versions from this thread
https://assemblergames.com/threads/req-dreamcast-archive.53514/
code needs conditionals because the two addresses we modify are modified by the game during fmv and loadings
first part modifies the instruction responsible for the fps limit to 30
second part modifies the speed value responsible for physics and timers etc

for japanese version
0D01BF2A
00007002 //check if correct instruction
0101BF2A
00007001 //modify fps instruction

0D3BC90E
000041F0 //check correct value
023BC90C
42700000 //modify speed value

for pal and us version
0D01BF2A
00007002
0101BF2A
00007001

0D3BBBEE
000041F0
023BBBEC
42700000

 

there is any way to put this mods on a iso?

 

I'd also love to see a bootable permanent 60fps version of this game

 

Yeah it will be very nice to build an iso with this framerate.
But the vga is at 60hz already, isn't it ?

 

for japanese version
0D01BF2A
00007002 //check if correct instruction
0101BF2A
00007001 //modify fps instruction

0D3BC90E
000041F0 //check correct value
023BC90C
42700000 //modify speed value


The 2 modified addresses should be in the file LEMANS24.BIN

Address 0xbf2a (02 changed to 01)

Address 0xfd520 (00 00 F0 40 changed to 00 00 70 42)

 

Thanks, I'll build and test over the weekend

 

An iso with 60 fps and a widescreen hack ? :

0229B90C
3F400000

 

I was just going to do the 60fps if possible. I don't play Dreamcast on a widescreen TV.
I keep it real with a 4:3 CRT

 

Are all the values changed in that bin? or the track bins for the GDI?
HxD sill good to use?
Its been a long time since I last did hex editing.

 

Tony Hawk's Pro Skater T40205N V1.000

60fps
01103DC8
00000009

43BC2C48 offset track5.bin

Tony Hawk's Pro Skater 2 T13006N V1.001

60fps
010CC248
00000009

3979D388 offset track5.bin

regarding Le mans 24, yzb37859365 gave the correct offsets
for japanese version HDR-0149 V1.000
52B59EA offset track5.bin for fps
53CAD70 offset track5.bin for speed value

 

ECCO the Dolphin - Defender of the Future HDR-0103 V1.005

60fps
0103337C
00000009

3F866D5C offset track5.bin

Gameplay is normal speed, but if you let the game to demo itself at the title screen, the demo is double speed. If I fix the demo then the gameplay is double speed, weird. Maybe yzb37859365 can take a look, the code around 8C04B10C is the part that seems to calculate the game speed.

 

Good idea posting other 60fps hacks! This should become the official 60FPS hacks thread now like the widescreen hacks thread.

 

Redline Racer T15002M V1.001

60fps
01025C74
0000E401

9EF44B4 offset track11.bin

 

Monaco Grand Prix Racing Simulation 2 T17701M V1.006

60fps
011622C2
0000E400

8852E52 offset track22.bin

 

Sega GT - Homologation Special HDR-0054 V1.006

60fps
0116ED08
0000E400 //fps
01028084
000000A6 //timer fix

0202C214 42700000
0202C268 42700000 //car handling, physics etc
0202C2C0 42700000
0202C334 42700000
0202C58C 42700000
0202C7C4 42700000
0202D218 42700000
0202D2C0 42700000
0202D8E8 42700000
0202D988 42700000
0202DCB8 42700000
0202DE30 42700000
0202DF18 42700000
0202E358 42700000
0202F4C4 42700000
0202FD80 42700000
02030200 42700000
02030F18 42700000
02031008 42700000
02031408 42700000
02032518 42700000
020327A0 42700000
020335C4 42700000
0203412C 42700000
02035120 42700000

1. fps 159E16C8 offset track15.bin
2. timer fix 1586A2D4 offset track15.bin
3. the next 25 values
start 1586EDE4 offset track15.bin
end 15879250 offset track15.bin (inclusive)
just modify all occurrences of 0000F041, all 25 of them
Not sure if all are necessary, but surely is a combination of them because there is acceleration, traverse speed, distance etc. Don't have the patience to find the right combination. Anyway game works ok, could make the same laptimes as in 30fps.

 

Maybe this will help people hack dreamcast games, in the absence of an emulator with debugging features.
There is a way to have breaking points and stepping trough the code , seeing the registers etc using demul and cheat engine.
Use the following addresses with cheat engine, the addresses are valid for the latest demul(but is easy to find for other versions or any other emulator)
demul.exe+875E410 this is the PC register
demul.exe+875E3FC this is the PR register
demul.exe+875E2C0 this is R0 register, next to it are the rest of the registers
demul.exe+875E320 this is FR0 register, next to it are the rest of float registers
For accuracy switch demul CPU mode to interpreter.
Separate in notepad(or any other program) have the main elf disassembled obtained by any sh4 dissasemmblers available.
Example 1: if you simply want randomly to break and step, just set a write to the PC register, then just press F9(run in cheat engine) and see nicely the value of PC register increasing where it jumps etc
Example 2: let's say you find the ammo address for Biohazard, then set a write breakpoint to that adress and when the break happens just look at the PC register. The value of the PC is the exact location in the dreamcast elf where the write happened. Then if you just want to step further, set an additional writebreakpoint to the PC register, this way you can continue stepping from the initial ammo break that happened. You just follow the PC values in the opened dissasembled file.
These methods work for any emulator and cheat engine is nice because it is a value seracher and debugger in one.
P.S. english is not my first language

 

Exhibition of Speed T22903D 50V1.000

60fps
010127F0
000089E3 //fps
01012870
0000E33C //timings

E5B4850 offset track11.bin
E5B4A00 offset track11.bin

 

What is the default fps on MSR? could that be given the asasega 60fps magic?

 

F1 Racing Championship 17706D-50 V1.001

60fps
0105FE20
0000E401

CC4DF40 offset track12.bin

Looney Tunes Space Race T15116N V1.000

60fps
0D014552
00007102
01014552
00007101

7EA2E2 offset track17.bin

@8bitplus, for MSR the user kabuto_kun(iirc in the widescreen thread) already posted a code

 

Racing Simulation 2 - Monaco Grand Prix On-Line T-45006D50V1.002

60fps
011969A8
0000E400

1165CA78 offset track21.bin