Try this way.
1. Rename CHD file to 1.chd (for ease of use).

2. Extract CHD = chdman.exe -extractcd 1.chd 1.toc 1.bin

3. Delete 1.toc (not needed).

4. Create a cue sheet for the bin file = bin2iso.exe 1.cue -c 1.bin

5. Edit the cue sheet with notepad, find the last track and edit "AUDIO" to "MODE1/2352" then save.

6. Open the cue sheet with isobuster and extract the last track (Extract RAW Data (2352bytes\block)(*.Bin,*.Iso))

save as or rename to track03.iso (for ease of use).

7. Now use gdrom2rom to create a decripted rom and lst file put both these in a folder with the games name

and now delete bin cue and track03

Check the photo thread for proof it works.

 

Yeah really works for me, thanks @yesthanks.

 

I tried both methods for one game, but chdman can't decompress it.

Said game is SlashOut. (gds-0004)

Every time I try, it just won't give me the output files.
Any help would be appreciated!

 

I tried both methods for one game, but chdman can't decompress it.

Said game is SlashOut. (gds-0004)

Every time I try, it just won't give me the output files.
Any help would be appreciated!

Shashout is not in GD-Rom format. It's a catridge, so forget it. Wait until Guru dump it correctly.

 

Shashout is not in GD-Rom format. It's a catridge, so forget it. Wait until Guru dump it correctly.

You are wrong, Slashout is GD-ROM and is dumped but not playbale in current release.

@shwa:

Maybe a bad dump? Corrupted file?

 

You are wrong, Slashout is GD-ROM and is dumped but not playbale in current release.

Very true and i have converted this from chd, double check each step of the how to.

 

Try this way.
1. Rename CHD file to 1.chd (for ease of use).

2. Extract CHD = chdman.exe -extractcd 1.chd 1.toc 1.bin

3. Delete 1.toc (not needed).

4. Create a cue sheet for the bin file = bin2iso.exe 1.cue -c 1.bin

5. Edit the cue sheet with notepad, find the last track and edit "AUDIO" to "MODE1/2352" then save.

6. Open the cue sheet with isobuster and extract the last track (Extract RAW Data (2352bytes\block)(*.Bin,*.Iso))

save as or rename to track03.iso (for ease of use).

7. Now use gdrom2rom to create a decripted rom and lst file put both these in a folder with the games name

and now delete bin cue and track03

Check the photo thread for proof it works.

OMG... Its work. I was able convert chd to gd-rom format. Thank a lot.

 

Trying to convert the Initial D : Arcade Stage (Japan) [gds-0020b] CHD to ROM. Got the track03.iso out, but am getting a wrong key error. I'm using the key from Guru's page (D980A8E6ECA464B6), but still getting wrong key.

Any advice?

~dan

 

Try this way.
1. Rename CHD file to 1.chd (for ease of use).

2. Extract CHD = chdman.exe -extractcd 1.chd 1.toc 1.bin
Before:

After:

3. Delete 1.toc (not needed).
4. Create a cue sheet for the bin file = bin2iso.exe 1.cue -c 1.bin
Before:

After:

5. Edit the cue sheet with notepad, find the last track and edit "AUDIO" to "MODE1/2352" then save.
Before:

After:

6. Open the cue sheet with isobuster and extract the last track (Extract RAW Data (2352bytes\block)(*.Bin,*.Iso))
Before:

After:

save as or rename to track03.iso (for ease of use).

Before that you need rename track03.iso to track03.bin
Before:

After:

7. Now use gdrom2rom to create a decripted rom and lst file put both these in a folder with the games name
Before:

After:

Program need to convert CHD to GD-Rom Format.
Program can be found attachment:
chdman.exe
bin2iso.exe
Isobuster can be found at net. (Shareware)

 

Hey Tony!
Can you PM me a copy of the gdrom2rom gui, when i download it i always get a bad file.
Thanks man!
Also on a side note cvs2gd will not convert from CHD, i found this on another forum...

"Note we have used the cvs2gd NonMAME CHD (sha1 2518b7d885292296ed0ab690967a1ae83145d7c7), since the official one (sha1 b5fd12aa88383f4f5a47547b3fa4bd4d25bf781f) is false and/or incomplete. Mame is not always accurate : sadly, neogeo successive romsets have already prove this fact."

 

Hello.

This will probably be a dumb set of questions but in case I'm missing something:
Does this process allow the conversion of a MAME chd to GDROM format that can be played on NullDC with the GD-ROM plugin?
Are the corresponding MAME ROMS needed to run the game on NullDC or does this process lumps them all together?
Can the MAME Naomi bios files be used on NullDC?

Thank you.

 

All comes from mame....
indeed...

 

OK.
I'll give it a try.
Thanks.

 

More annoying questions:

1. Is there any way to have NullDC rotate the display? Ikaruga is set up for a vertical screen and there does not seem to be an option to rotate it to play with the correct orientation on a horizontal screen
2. Where can I find a list of shortcut keys, if any? I would like to know if there are Pause and Throttle functions mapped to some keys
3. Why are the NAOMI ROMs so tiny compared with the original GD-ROMs after using gdrom2rom? Ikaruga is a mere 32MB.

Thank you for your patience.

 

More annoying questions:

1. Is there any way to have NullDC rotate the display? Ikaruga is set up for a vertical screen and there does not seem to be an option to rotate it to play with the correct orientation on a horizontal screen
2. Where can I find a list of shortcut keys, if any? I would like to know if there are Pause and Throttle functions mapped to some keys
3. Why are the NAOMI ROMs so tiny compared with the original GD-ROMs after using gdrom2rom? Ikaruga is a mere 32MB.

Thank you for your patience.

Answer:
1. Maybe in next version.
2. You can created shortcut, if you know where to start the emu. There is "stop" button, if you start again, it will crash or freeze.
3. Maybe different conversion.

 

hope u wont mind me asking......ive been trying these steps with initial d....on the final step (GDROM2ROM...) it says "invalid key game wont run"
any help? thanx a bunch....^^

 

hope u wont mind me asking......ive been trying these steps with initial d....on the final step (GDROM2ROM...) it says "invalid key game wont run"
any help? thanx a bunch....^^

InitialD is NAOMI 2 so I guess gdrom2rom only decrypt NAOMI 1.

 

Hey this works really well is there a list of what works and what doesnt work at the moment, cheers first time poster but see my self being a regular, great site

 

Hey this works really well is there a list of what works and what doesnt work at the moment, cheers first time poster but see my self being a regular, great site

Go here instead.

 

Here is new easy way to extract/decrypt naomi CHD using MAME 130u1:
Start any Naomi GDR game using MAME
Wait message "Type OK or move joystick...." then press Esc
Look into MAME root dir - you see two new files here "decrypted <gamename>" and "encrypted <gamename>"
Just rename "decrypted <gamename>" to some thing like game.bin, make LST file and run it with nullDC-Naomi

example LST:

Game Name
"bin-file-name",   0x0000000, <length of bin-file-name>

 

But how do you make a LST file if you dont know the correct memory region the gd loads to????

 

But how do you make a LST file if you dont know the correct memory region the gd loads to????

no need to know memory region, you must only set correct file lenght
here is my LST for "Border Down"

Border Down

"bdrdown.bin",   0x0000000, 0x0D400000

 

How do i get the lenght of the bin file?

 

memory size

Look the the file size
(Right clic Properties)
copy the number in bytes
then in windows calculator
in the menu view select cientific
paste the number
and clic in HEX

Example

 

Look the the file size
(Right clic Properties)
copy the number in bytes
then in windows calculator
in the menu view select cientific
paste the number
and clic in HEX

Example

Thanks man, muy agradecido.