The -200 revision likely indicates a specific dump that matches particular checksums (e.g., MD5, SHA-1) expected by certain emulator configurations.
While the file is technically critical for emulation, its status is legally complex. The scph-70012-bios-v12-usa-200.bin is copyrighted software owned by Sony Computer Entertainment. scph-70012-bios-v12-usa-200.bin
The only (and strictly legal) way to obtain this file is through a process called "bios dumping." You take a physical SCPH-70012 console, use a homebrew tool like BIOS Dump Utility run via Free MCBoot, and copy the ROM to a USB drive. The -200 revision likely indicates a specific dump