Fixed RE:CV to play properly on cloned GDEMU

[fafadou]

I had translated the resident evil code veronica kazenban to french with the fabulous team of @truemaster and @Pitito and we patched the 1ST_READ.BIN for translating so I had a look with my beginner eye.
I can say the assembler patch is totally massive of knowledge !
Well done and many thanks dear @yzb.

[jse]

RE_CV000.013.zip

Tiger Statue Game Save

(1.43 KiB) Downloaded 304 times

Hey YZB I tested your patched version using a clone GDEMU on 5.15.0, I can confirm it works perfectly Thank you again.
嘿，YZB，我在5.15.0上用克隆的GDEMU测试了你的补丁版本，我可以确认它工作得很完美:) 再次感谢你。

[Gromber]

I envy you, hope also I can play the spanish pal version with vga patch support in the not too distant future hehehe

[bshi02]

I really want to know How you can found culprit code which cause tiger jewels bug in GDEMU version 5.15.0..

[K470r]

I had translated the resident evil code veronica kazenban to french with the fabulous team of @truemaster and @Pitito and we patched the 1ST_READ.BIN for translating so I had a look with my beginner eye.
I can say the assembler patch is totally massive of knowledge !
Well done and many thanks dear @yzb.

hello fafadu

Do you know if it is possible to apply @yzb's fix to the French translated version without damaging the translation?

[fafadou]

I'm looking for it.

[ateam]

Firstly, thank you very much for creating this patch, YZB. While I don't use a clone GDEMU myself, I know that many people will find this immensely useful! Great work.

EDIT: Disregard all of the below. I have to look at the actual assembly to do this. Please see this post instead:
https://www.dreamcast-talk.com/forum/viewtopic.php?f=42&t=15359&p=163550#p163550

That being said, I was surprised nobody has tried to "backport" this patch to the English-patched version of "Resident Evil: Code Veronica X" yet, so I decided to take a look myself. I identified the two areas in 1ST_READ.BIN that YZB modified for this patch and believe that I've created a GDI of the "Code X" version that will also work. However, I need someone to test it out for me.

Resident Evil - Code Veronica X (English - Disc 1) (Clone GDEMU Item Bug Patch) [GDI].zip
link removed

Hopefully somebody can test this version out and let me know if it works as expected. If so, then these are the two areas that need to be modified inside 1ST_READ.BIN for anybody looking to apply YZB's fix to other versions of "Code Veronica". Simplest thing to do is a find-and-replace using a hex editor of your choice.

FIND:

Code: Select all

22 D2 0B 42 09 00 08 20 01 89 13 A1

REPLACE:

Code: Select all

01 D3 2B 43 09 00 09 00 00 90 20 8C

FIND:

Code: Select all

00 00 CE B9 FF FF CE B9 CE B9 CE B9 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

REPLACE:

Code: Select all

00 00 CE B9 FF FF CE B9 CE B9 CE B9 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
10 C7 00 62 01 72 11 D3 32 61 18 21 03 8D 20 20
0F D3 2B 43 09 00 0F D4 42 63 0B D0 3E 00 6F 88
06 8D 10 E4 70 88 03 8D B5 70 40 88 05 8F 04 E4
3D 50 04 88 01 8F 42 32 EA 8B 02 C7 06 D3 2B 43
10 20 09 00 00 00 00 00 70 A6 02 00 00 85 16 8C
98 9D 01 8C F4 11 14 8C 72 9B 01 8C 00 00 00 00

[megavolt85]

Hopefully somebody can test this version out and let me know if it works as expected.

this method will not work, you need to fix all pointers

[ateam]

Hopefully somebody can test this version out and let me know if it works as expected.

this method will not work, you need to fix all pointers

Thanks! I haven’t looked at the actual assembly yet, this was just a quick attempt. I’ll dig deeper when I get a chance.

EDIT: Actually, the patched GDI I uploaded above might work, as the "Veronica" English patch uses the NTSC-J game binary and it appears the the relative functions/pointers are the same across both versions. I'll post an update after looking further.

[megavolt85]

to make it easier for you to understand, compare the patched Spanish version with the original