Mame Dl-1425.bin May 2026

Technically, dl-1425.bin is a BIOS dump (firmware ROM) taken from a specific microcontroller chip.

If MAME reports dl-1425.bin (NOT FOUND), the causes are:

Why is a file like dl-1425.bin necessary? Why not just emulate the LaserDisc?

The answer lies in the synchronization. Dragon’s Lair is a game of split-second timing. The LaserDisc player takes time to seek a track; the computer has to anticipate this delay. The BIOS handles the lookup tables, the score calculation, and the life tracking. Without dl-1425.bin, the emulated game would be a rudderless ship—a movie playing without any interactive logic. mame dl-1425.bin

Furthermore, the existence of this file highlights the fragility of "analog" gaming. The original EPROM chips that stored this code in arcade cabinets have a lifespan. Ultraviolet light erases them over decades, and bit-rot sets in. By dumping dl-1425.bin into the MAME ecosystem, the code is effectively immortalized. A collector in the year 2050 with a dead, corrupted EPROM can burn a new chip using the data from this file, bringing a silent cabinet back to life.

Capcom’s CPS-1 hardware (released 1988-1995) used a modular design: a main PCB (printed circuit board) with sub-boards for sound and graphics. The dl-1425.bin file is almost always associated with the sound subsystem of CPS-1 games.

Here’s the breakdown:

In many verified MAME dumps (e.g., sf2 or sf2ua sets), dl-1425.bin holds the Z80 sound driver code—the instructions that tell the sound chip which samples to play, at what pitch, and when. Without it, the game would run silently or crash during attract mode sound tests.

From a checksum perspective, the correct dl-1425.bin file has known hash values used by MAME for verification:

MAME’s internal XML database references this file in the rom and sample tags for the parent ROM set. Technically, dl-1425

You will need dl-1425.bin to run games on the Data East "DEC-0" / "MEC-M1" based hardware. Common ROM sets that call for this file include:

Note: Modern MAME versions often merge or rename these files. In up-to-date ROM sets (e.g., MAME 0.250+), dl-1425.bin may be rolled into a parent ROM or replaced by a different filename (e.g., ep-1425.bin or dl-1425.ic42).