Systems

omega-zero plays five systems, each on a shelf of its own. L1 and R1 move between the shelves; a system with no games has no shelf. The pill in the bottom bar names the one you are on.

System	Games go in	Files	Cores	On the shelf
Game Boy Advance	Games/GBA	.gba	mGBA, gpSP	Its cart
Game Boy	Games/GB	.gb, .gbc	mGBA	Its pak
Game Boy Color	Games/GBC	.gb, .gbc	mGBA	Its pak
SNES	Games/SNES	.sfc, .smc	Snes9x, Supafaust	The American SNES cart or the Super Famicom's
PlayStation	Games/PS1	.cue with its .bin, .chd, .pbp, .m3u	PCSX ReARMed	Its disc

Where a system has two cores, X on the shelf opens the cart and picks the core it runs on; the choice is kept per cart. The first one listed is the one a cart starts on. See Controls for the buttons, and The Card for every folder.

SNES

A game from the USA (or Canada, which had the same carts) stands as the American SNES cart, in its dark grey. A game from Japan, Europe or anywhere else stands as the Super Famicom cart, in its light grey, as Europe's carts were the Super Famicom's shape. The region comes from the ROM's header; a tag in the file name, such as (USA), (Japan) or (Europe), wins over it. A ROM with a copier's 512-byte header in front is read too.

To choose the shape yourself, give the cart a line in Config/cart_shell.ini, the shape then the plastic's colour and finish:

Super Mario World (Europe) = ntsc 8b8a91 solid
Chrono Trigger (USA) = sfc b7b6bb solid

ntsc is the American cart and sfc the Super Famicom's. auto leaves the shape to the ROM.

The SNES pad is the handheld's own: A, B, X, Y, L1 and R1 are the game's. L2 rewinds and R2 fast-forwards, as on the GBA. The picture is drawn at twice its size, 512x448 in the middle of the screen (512x478 for a game that shows its overscan); a game's hi-res and interlaced screens fill the same space. A game made for 50 Hz runs at 50 Hz.

Snes9x is the default core. Supafaust, Mednafen's SNES core, is the other. Snes9x is free for non-commercial use only; its licence is in System/licenses/ with the others.

PlayStation

omega-zero looks in Games/PS1 and in each folder directly inside it, so a game kept as Games/PS1/<Game>/<Game>.cue with its .bin beside it is found. A .bin is never a game on its own: it is the data its .cue points at.

A game on several discs is one game on the shelf, its discs stacked one behind another with a gap between them; the whole stack goes down into the handheld when you play it.

• An .m3u playlist that lists the discs is one game, named after the playlist. The discs it lists don't stand on their own as well.
• Discs in one folder whose names differ only by a (Disc 1), (Disc 2) tag (or (Disc 1 of 2)) are one game, named without the tag. omega-zero writes a playlist for them in Config/playlists/PS1/ and keeps it up to date.

In a game, SELECT + MENU opens DISC to put another disc in the drive; see Controls. The disc in the drive is kept in Saves/PS1/<game>.disc, so a game you come back to is on the disc you left it on.

PCSX ReARMed carries a BIOS of its own, and needs nothing more. A BIOS from a real console is used when it is in BIOS/, named scph5501.bin (or scph5500.bin, scph5502.bin, scph1001.bin, scph7001.bin, scph101.bin, psxonpsp660.bin). Each game has a memory card of its own, kept with its saves in Saves/PS1.

The pad: ✕, ○, □ and △ are B, A, Y and X, where they sit on the handheld; L1, R1, L2 and R2 are the game's. So fast-forward is SELECT + R2 held (twice to lock it on), and a PlayStation game has no rewind. The picture is 4:3: the whole screen on a 640x480 handheld, 640x480 in the middle of a 720x480 one, and 720x540 on the square 720x720. A game made for 50 Hz runs at 50 Hz.

A disc's region comes from its file name's tags, or else from the serial printed on it, such as SLUS-00594.