Hi everyone.
Sorry for my third post 

I often heard the phrase "Rom expanding". Ofcourse I know Nes Rom expanding is near to impossible, so it's not the case here. I want to ask that what is the use of expanding the Rom? Does Rom expanding provide us more space for the translated text? I don't find any document explain about this.

The second I want to ask, I have seen many different Snes header. Some of the begin at 0000080000AA.... while other begin at 01000200....... So I want to ask why do them so variable? I think the header must be the same for all Roms. Do headers influence the Rom? I mean, copy the header from Rom A and paste to Rom B, does it screw up the game?

These may be stupid questions, but I'm curious about them. Thank you very much.

Thank you very much!
By the way, are you the one at "JUST DO IT IDIOT!"?
I made me scare to piss reading the instruction. Thanks for making it. Very funny.

But I can't find vol 2 and more any where.

Why don't Gideon's documents show up in his forum profile? That's really bizarre...

...I've figured out the answer while posting, but maybe it's still worth bringing up. His forum profile shows files submitted by Aeon Genesis, but not Gideon Zhi. Is there anything that can be done about that? Maybe in RHDN 2.1? (Or 2.2, I forget which version we're on)

The 200 is from the copier header. (512 decimal is 200 hexadecimal.)

The internal header is supposed to be at $FFB0; but when the cartridge gets addresses, it can transform them to something else. In case of LoROM the 16th address line is ignored, so $FFB0 becomes $7FB0.

...I think he's going through every single thread in Gaming Discussion. It'll probably be a while before he sees this. I've actually been trying to PM him, too, for like an hour. :banghead:

I'm done with Fireemblem 3. It's safe to expand that Rom with Lunar Expand.

I have moved to Fireemblelm 4, which is a Hirom and it's already 4Mb. It's not enough space for the translated text. So I intend to expand it. But Lunar Expand doesn't have the option to expand Hirom above 4Mb (all I see are exhirom and exlorom from its menu).
So I used an hex editor to add a bunch of 00000000 at the end of the Rom. Currently it works (now the Rom is 6Mb) properly (can't see any error). But I wonder if everyone can expand his Rom easily by hand like this, why use Lunar Expand because it's limitted to just some type of Rom.

So I think I'm wrong. It would be great if anyone teach me wethere I'm wrong or not when expanding Rom manually.

Thank you in advance.

You probably won't see any errors on emulators. The only thing that will happen is you just won't be able to access any of the data you put in the expanded area. Have you tried that? I'd imagine that will fail. You have to set your ROM up to mimic one of the other supported ROMs above 4MB. The reason being is you have to use something emulators will be able to map correctly.

Up to 4MB, in most cases, you could just expand it by hand. But you aren't understanding what's going on. Lunar Expand isn't limited to 'just some type of ROM'. It's limited to the cart mappings that cover most commercial carts. You can't just make up a cart mapping and expect an emulator or copier to support it out of the box. The reason you can expand most HiROM and LoROM games by hand up to 4MB is because the ROM space is linearly mapped. And the way system addressing works is you can address that full 4MB area whether there's actual data there or not. So for games that don't use it all, simply adding it in manually works just fine. This is simplified but that's the general idea.

Nonetheless, before I go off on a rant that will probably fly over your head, I'll give you some recommend reading so you can attempt to understand what you're doing and what's going on with these expansions.

http://www.romhacking.net/docs/193/

Fully understanding SNES addressing and cart mapping is a bit of difficult subject to grasp at first, especially for cases that deviates from the the most common.

You have to try and look at it from the SNES perspective. All it can see are these addresses from 00:0000 to FF:FFFF. It doesn't care what's at the other end. What actually is on the other end can vary and be influenced by the world and hardware around it. In the case of regions that aren't mapped to the system internally, the hardware on the cart controls what actual ROM data will respond to the address that makes it out to the cart. It just so happens that most carts used either LoROM or HiROM mapping.

Theoretically you could create a cart that responds to only a single address, say C0:0000, but has mapping and/or other special hardware on board that would swap in and return any desired ROM data at C0:000. That would be a dumb cart to make and not work on any emulators or copiers, but it should put things in perspective for you. All the SNES does is yell out on the address bus 'I want data for C0:0000' What actually comes back on the data bus could be damn near anything from any piece of hardware, register, or device that responds to that.