All Mame Bios [top] -

MAME (Multiple Arcade Machine Emulator) requires BIOS files to act as the "operating system" for specific arcade hardware platforms

for PolyGame Master) so they don't have to hunt them down individually. File Placement all mame bios

Think of it this way:

When you run a game on MAME, it uses the BIOS files to initialize the emulation process. The BIOS files provide MAME with the necessary information to: MAME (Multiple Arcade Machine Emulator) requires BIOS files