Super Disc Boot ROM

Super Disc Boot ROM
Developer: Sony Corporation Platform: SNES This game has hidden developer credits. This game has hidden development-related text. This game has debugging material.

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 PlayStation add-on/all-in-one SNES+CD console, and came in the form of a separate cartridge that would have plugged into the console's cartridge slot. The fact that there is only one known working unit in existence makes this 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 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	Erase	Return

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.