MoI discussion forum
These are "Compressed Hard Disk" files. They are much larger and are required for games that originally used hard drives or CD-ROMs, such as Killer Instinct or Area 51 . 3. Why use this specific version?
If you have a mixed bag of ROMs, you can use a tool called clrmamepro along with a MAME 0.078 DAT file to rebuild and verify your set. Conclusion MAME 2003 Reference Set - MAME 0.078 ROMs- CHDs...
Today, if you see someone playing Ms. Pac-Man on a handheld device, or Golden Axe on a mini-console, they are likely interacting with the spectral data of that 2003 Reference Set. It is a snapshot of history, preserved in amber, a digital monument to the era when the arcades fell, but the games refused to die. These are "Compressed Hard Disk" files
Modern MAME emulates discrete logic circuits (e.g., the analog sound board in Donkey Kong ). It's accurate, but it eats CPU like candy. MAME 2003 uses sampled or simplified emulation. Asteroids and Pong sound 90% correct but run on a potato. Why use this specific version