System software

BIOS

512KB OS ROM that holds the PlayStation kernel, boot loader, shell and fonts.

• BIOS A Functions
• BIOS B Functions
• BIOS Boot
• BIOS C Functions
• BIOS Events
• BIOS File I/O
• BIOS Syscalls and Breaks
• BIOS Threads

PS-X EXE

Execution file format loaded and started by the PlayStation kernel.

PS-X OS

Kernel of the PlayStation that provides its services as C functions.

SYSTEM.CNF

System designation file that names the program to start from a disc.