Dreamcast Widescreen Hacks

@yzb37859365

Hacked 1ST_READ.bin worked great!

Not sure how or what you did but it works.

with the above hacked file is a simple as changing the value at 0x001C37BC to adjust the ratio

 

MAKEN X PAL
0231290C---3F400000


SKIES OF ARCADIA PAL
02502A88---3F400000

TENNIS 2K2 (VIRTUA TENNIS 2)
024A19B0----43700000

SEGA GT PAL
025D613C----3F400000

SEGA RALLY 2 NTSC J ( Someone please test this one on real hardware)
02BD9BA0----3F400000

 

I was using dcdis, which someone provided a link to on page 2 or 3 of this thread. It requires you to compile it from source code. I don't know of any assembler, I assembled instructions by hand. The SH4 documentation gives you the binary for each instruction.

I am working on an SH4 plug-in for Hopper disassembler, based on the code to dcdis. But that's only for Linux and Mac OS X, and it's a paid product. There was once a Windows version, which I owned a license to as well, but that was dropped in version 3.0. It costs a fraction of what IDA does though, and it's written by one guy. It has an awesome decompiler too, but obviously I won't be implementing one for the SH4 plugin. I should have that ready in another day or two, it's already decoding instructions so I just need to hook up the branches and some other stuff.

SH4 for Hopper:
https://github.com/Sappharad/HopperSH4-Plugin

I don't think so. I'm honestly surprised and pleased by the amount of others that people have done so far, I wasn't expecting this much since there weren't any just a few weeks ago.

I have a couple more I'd like to do, but I'm going to work on the SH4 plug-in I mentioned earlier in this post before I lose interest or run out of time.

 

@Rocky5
Shenmue (NTSC) 1ST_Read.bin

hack v2

In the game, press start + A button to switch the display mode
https://mega.nz/#!zQVTUYCT!a8rfdmbiEbeZQMTymsJsGdFLzJCT4KhQPGOZVSK09ek


@S4pph4rad
@-=FamilyGuy=-
I have been using WinHex to write the SH4 assembler

 

The House of the dead 2 PAL
024C6708---43700000

 

This is awesome, great work guys!

 

thanks!!! i wish a standalone tool with widescreen and japanese_cake vga patches for use with backups and original games.

 

That's awesome, I will try this this weekend! Great job!
You used the correct value for 16:9?

 

This is amazing!

Can you please post the SH-4 assembly code that you wrote?

Also, at what address in the 1ST_READ.BIN did you insert that code?

Thank you in advance!

 

Button combo doesn't work, the game just defaults to widescreen.

 

I dont suppose anyone is up for getting the codes for US version of D2

 

I've been looking in to it, so far I've only found how to change the vertical fov, not the horizontal one, so... 16x9 widescreen, but the image is cropped instead of expanded, I'll see what I can do.

 

It's not perfect, but there's usually a "zoom" value nearby in most games. You could always zoom out to whatever percentage of the original is applicable, then adjust vertical FOV back to what it needs to be.

It will make it harder for people to change the values themselves, but it's better than nothing.

 

@-=FamilyGuy=-
I just put the number of addresses to 0x43800000 or 0x43a00000

@Giorgio
I wrote it, the code is very simple
Code I generally are inserted in the original read the key procedures

Code:

sub_C01FF00:
        mova    @(h'2C,pc), r0 ; unk_C01FF30
        mov.b    @r0, r1
        mov.l    @(h'24,pc), r2 ; [0C01FF2C] = unk_C2318D0
        mov.b    @r2, r3
        cmp/eq    r1, r3
        bt    loc_C01FF24
        mov.b    r3, @r0
        mov    r3, r0
        cmp/eq    #h'A, r0
        bf    loc_C01FF24
        mov.l    @(h'1C,pc), r1 ; [0C01FF34] = unk_C230250
        mov.l    @r1, r0
        mov.l    @(h'1C,pc), r2 ; [0C01FF38] = h'43A00000
        cmp/eq    r0, r2
        mov.l    @(h'1C,pc), r3 ; [0C01FF3C] = h'43800000
        bt    loc_C01FF22
        mov    r2, r3

loc_C01FF22:                ;
        mov.l    r3, @r1

loc_C01FF24:                ;
        mov.l    @(h'18,pc), r3 ; [0C01FF40] = sub_C1DEC6E
        jmp    @r3 ; sub_C1DEC6E
        nop

@Rocky5
You can use the EMU to try?
I'm just testing it on the EMU.

BTW,hack2_1ST_READ.rar After decompression is 1ST_READ.BIN.....
I modified the default not Widescreen......

@Esppiral
good luck

 

The file you linked to is hack_1ST_READ.rar & its the same as the first one you released.

 

@Rocky5
sorry~

I UPLOAD NEW~
https://mega.nz/#!7M81kZpR!2ysDwbkXTuEeA-hUvVd617SYsGeP3MPP-FZ7T9SRBtg


@Esppiral
Can you help me find the Ikaruga address?
I can upload hack image~
thank you·

 

I think 02502A84 3F400000 is correct. 02502A88 changes it vertically.

 

I can confirm this works!

EDIT: I'm not actually 100% now

 

It is only working in the menus?

I tested it on demul, it worked on the menus, everything was 16x9 but once ingame, the value would revert to the previous one, I changed it again and it went back to 16x9 for a millisecond, then the value changed again automatically to the original, didn't know if it was the emulator or what.

Does anyone know how to make ir permanent? I've found this issue in some games too.

BTW D2 and Ikaruga achieved!



I'll post a bunch of codes "soon™" xD

 

@Esppiral

How much is the Ikaruga memory address?


There are some games that are going to be kept in the loop, such as Metal Geomatrix - Heavy, which can only be used by internal programs.