Mega-CD real region free on game discs

Managed to find one £6.25

anyone that wants one as well here is the ebay link


http://www.ebay.co.uk/itm/ML-2016-T...rElectronics_Batteries_SM&hash=item2ecc25c861

 

Hey all,

It appears the byteswapping utility hates 64 bit Operating systems:



any word on how to get past this?

 

Run a VM of 32bit should work.

 

Obviously.

 

running a vm seems excessive.

https://dl.dropboxusercontent.com/u/28488139/byteswap.zip

 

Yeah, don't set up a vm for this! It is pretty straightforward to do in any programming language! At last resort use wine! Learning to do it in python might be even less of a pain than to seting-up a vm to do it for you!

 

Any decent hex editor can byteswap.

 

The one I linked above works on x64

 

Thanks!

Good to know I don't have to setup XP mode on my laptop now

 

It's worth setting up seeing how simple it is to get running, assuming you've got the spare HDD space.

 

So, if I have a NA Sega CD model 2 and a Mega Everdrive, which region free Bios is the one to use?

 

the JP megaCD bios is the best. 100% compatibility.

 

OK back to the main post where do you start to grab the header data from say a Sega CD game to patch say Final Fight CD NTSC-J? I only want to do this one game instead of bothering installing a new BIOS for one game.SDConv fails patching this game so was hoping to do this manually for the one game.

 

You can't convert a Japanese game to other regions without moving the initial program loader code to a new address. On that particular game moving the program code forward in memory is failing and that's why SDCONV isn't working for you.

Making non Japanese games work in a Japanese system is easy because the security program on Japanese machines are smaller so you can just pad the difference with NOP instructions. No relocation required.

Because of that, you won't get away with that game, without modding your BIOS.

 

Question, were any other boot roms modified to be region free, or only the ones in the first post of the topic? Specifically I'm looking for a region free version of MPR-15764 (aka us_scd2_930621) from the USA Sega CD 2.

 

PM me.

 

I burnt jp_mcd1_911228_region_free.bin on a 27C1024-85 for my Japanese Mega CD 1 but it will not boot with that chip (the whole unit will not power on with it). Had to revert to the original BIOS chip.

 

You HAVE to byteswap them as 68000 is a big endian CPU.

 

I did byteswap it with the Windows exe linked to earlier in the thread.

 

Just a word of caution, this program is doing 32bit word swap, not 16 bit byte swap...

Edit: Also, please check the new thread with newer versions of these files.