How did Star Ocean fit a voiced intro on a Super Famicom cartridge?

A 48-megabit cartridge, a decompression chip doing quiet magic, and an intro spoken in English.

Star Ocean shipped on July 19, 1996 on a 48-megabit cartridge, six megabytes, tied with Tales of Phantasia as the largest game ROM ever officially released for the Super Famicom or SNES. That alone was not enough. Inside the cartridge sat a second piece of silicon, the S-DD1, a Ricoh chip whose only job was to decompress graphics data on the fly as the console read it, so the artwork the player sees is substantially larger than the data actually stored.

The space bought things no cartridge RPG was supposed to have: dense, detailed sprite work, voice clips in battle, and a fully voiced opening sequence of about a minute and a half, recorded in English with Japanese subtitles for a game that was only ever sold in Japan. The S-DD1 was so unusual that only one other game ever used it, Capcom’s Street Fighter Alpha 2, and it resisted emulation for years.

THE HARDWARE

ROM, chip, and consequences

48 megabits, tied for first

Most big SNES RPGs shipped at 24 or 32 megabits. Star Ocean and Tales of Phantasia, the two games made by the two halves of Wolf Team, stand alone at 48. Large ROMs were expensive to manufacture, which is one reason neither game was localized for the SNES in its day.

The S-DD1 chip

Developed by Ricoh, the S-DD1 decompresses graphics as they stream from the ROM, with no cost to the SNES’s slow main processor. Decompressed, Star Ocean’s graphical data runs to roughly double the cartridge’s physical size, which is how a 48-megabit game presents like a much larger one.

The voiced opening

The game opens with a narrated, voiced sequence in English, an extravagance on a cartridge format where voice was normally limited to a shouted word or two. Battle voices, shouts and spell calls ride on the same budget of space.

The emulator problem

The S-DD1’s compression format stumped emulator authors for years. Early emulation relied on “graphics packs”, decompressed data dumped from real hardware and bolted onto the ROM, until the algorithm was finally cracked and emulators could decompress the game the way the chip did.

WHY IT MATTERED

Ambition as a design value

A late-cycle statement

Star Ocean arrived in the Super Famicom’s final summer, weeks before the Nintendo 64 era began in earnest. tri-Ace’s answer to a dying platform was to spend money on silicon and make the old machine do visibly new things.

The cost of staying home

Enix’s American branch closed before the game was finished, and the expensive cartridge gave nobody a reason to fight for a translation. The first Star Ocean stayed in Japan until its PSP remake reached the West in 2008, twelve years later.

The First Star Ocean How Phantasia Fit a Sung Theme Song

How did Star Ocean fit a voiced intro on a Super Famicom cartridge?

THE HARDWARE

WHY IT MATTERED

THE FIRST WORD