1.    TERMINOLOGY

 

Before we start, let’s explain some terms we are going to use through this tutorial we must clearly keep in mind.

 

Game: just what it says!

Set: each of the versions of a game.

Clone: version of a game different from the original.

 

Example: The game “1941 - Counter Attack” has 2 sets, the main set: “1941 - Counter Attack (World)”; and a clone set: “1941 - Counter Attack (Japan)”.

 

ROM: each of the files contained in a set.

 

Example: In the game “1941 - Counter Attack”, the main set, “1941 - Counter Attack (World)”, contains the following ROMs:

 

41e_30.rom

41e_31.rom

41e_35.rom

41e_36.rom

41_09.rom

41_18.rom

41_19.rom

41_32.rom

41_gfx1.rom

41_gfx3.rom

41_gfx5.rom

41_gfx7.rom

 

ROM set: self-explanatory; groups of ROMs that make a particular set.

 

Example: The previous table is the ROM set for the set “1941 – Counter Attack (World)”.

 

Usually, ROM sets are contained within ZIP files. Each set must be in an independent file (we will see later that this is not strictly necessary) with a particular name. Continuing with our example, we can say that the two 1941 sets must be named 1941.zip (World) and 1941j.zip (Japan).

 

ROM sets can also be stored in directories. In this case, each set must be placed in an individual directory, where the name of the directory must be the same as the ZIP file.

 

We are now going to see in more detail the different possibilities we have to store ROM sets.