Super Disc Boot ROM

This game was never completed and/or given a public release. As a result of this, keep in mind that the developers might have used or deleted some of the content featured here, had the game actually been released.

This page is rather stubbly and could use some expansion. Are you a bad enough dude to rescue this article?

The Super Disc Boot ROM would have been required to boot disc-based games on Sony's ill-fated Super Famicom/SNES CD add-on and all-in-one Super Famicom + CD console (called the PlayStation), and came in the form of a separate cartridge that would have plugged into the console's cartridge slot. Only two working units are known to exist (one discovered in an attic by Terry Diebold and sold at an estate sale, the other being owned by the father of former Sony CEO Ken Kutaragi), and as a result the Boot ROM is little more than a curiosity.

Now that the Super Disc prototype is finally working, all that's needed is someone who can reverse-engineer it so that proper emulation of the Super Famicom/SNES CD add-on can happen. Currently, only no$sns can emulate it, but not very accurately.

Download Super Disc Boot ROM File: Super Disc Boot ROM.rar (60 KB) (info)

Hidden Text#

Present at the very beginning of the ROM:

Super Disc boot ROM ver.0.95 Jul. 14, 1992 by Tomomi Abe at SONY

A slightly different version is at 0x606B in the unheadered ROM:

Super Disc BIOS program ver.0.93 by Tomomi Abe. May. 26 1992 at SONY.

MONITOR MENU#

Press A + X at the title screen to enter the debug menu.

SELF CHECK#

Basic Functions	Expansion Functions
V-RAM	EXPANSION RAM
CG-RAM	BACKUP RAM
OAM	CD-ROM DECODER
WORK RAM	CD-PLAYER I/F
DMA
TIMER
SOUND SOURCE CHECK
	Finished.

ADPCM#

• Select - Return to main menu.
• D-Pad - Set digits.
• L / R - Select previous/next setting.

COMMUNICATION#

• Select - Return to main menu.
• D-Pad - Set digits.
• B - Send command.
• L / R - Select previous/next command.
• X - Restore command during a command process.

CXD-1800#

• Select - Return to main menu.
• D-Pad - Set digits.
• L / R - Select previous/next register.
• B - Write/Read Byte to/from register.
• Y - Set between Write/Read Mode.
• X - Set between different IRQ modes (IRQ-1TIME, IRQ-IGNORE, IRQ-ALL).

BACKUP RAM#

BACKUP RAM

There aren't any files.

Select

Press Select at the title screen when the CD-ROM System is detected to access this menu.

• D-Pad - Select save.
• B - Erase save.
• Y - Go back.