Being the first BIOS, it is widely documented and highly compatible with early Japanese titles.
The SCPH-10000 featured separate RCA jacks (left/right audio) directly on the back of the console. Later models moved these to the multi-out port. Consequently, the SCPH-10000 has a reputation for having a "warmer," less noisy analog audio output than any subsequent PSX model. Some musicians still buy broken SCPH-10000s just to cannibalize their audio circuitry. scph10000.bin