# Play! emulator BIOS profile
# Generated from source analysis of https://github.com/jpd002/Play-
# Commit analyzed: HEAD as of 2026-03-17

emulator: "Play!"
type: libretro
core_name: play_libretro
source: "https://github.com/jpd002/Play-"
profiled_date: "2026-03-18"
core_version: "Git"
display_name: "Sony - PlayStation 2 (Play!)"
systems: [sony-playstation-2]

bios_directory: null
bios_detection: "hle"
bios_selection: "not_applicable"

validation:
  method: "none"
  note: >
    Play! is a full HLE (High-Level Emulation) PS2 emulator. It does not load or
    require any real PS2 BIOS dump. The LoadBIOS() function in Ee_SubSystem.cpp
    (which would read ./vfs/rom0/scph10000.bin) is commented out in PS2VM.cpp:ResetVM().

files: []
  # No BIOS files required.
  # IOP modules (rom0:SIO2MAN, rom0:PADMAN, rom0:MCMAN, rom0:MCSERV, etc.)
  # are all replaced by HLE implementations in Source/iop/IopBios.cpp.
  # The EE kernel/OS is reimplemented in Source/ee/PS2OS.cpp.

virtual_filesystem:
  # Play! uses a virtual filesystem for memory cards and disc access,
  # but these are runtime directories, not BIOS files.
  mc0: {default: "vfs/mc0", purpose: "Memory card slot 0 (save data)"}
  mc1: {default: "vfs/mc1", purpose: "Memory card slot 1 (save data)"}
  host: {default: "vfs/host", purpose: "Host filesystem access"}
  cdrom0: {default: null, purpose: "Disc image (set per-game)"}

memory_layout:
  EE_RAM: {size: "32 MB (0x02000000)"}
  EE_BIOS: {size: "4 MB (0x00400000)", note: "Allocated but unused, HLE replaces real BIOS"}
  IOP_RAM: {size: "2 MB (0x00200000)"}
  SPU_RAM: {size: "2 MB (0x00200000)"}

notes: |
  Play! does not require any PS2 BIOS files. Unlike PCSX2, it uses High-Level
  Emulation to reimplement the PS2 kernel, IOP BIOS modules, and system services
  entirely in C++.

  Key HLE components:
  - EE kernel: Source/ee/PS2OS.cpp (handles BootFromCDROM, BootFromFile, syscalls)
  - IOP BIOS: Source/iop/IopBios.cpp (HLE modules for rom0:PADMAN, MCMAN, MCSERV, etc.)
  - No rom0/rom1/erom files are loaded at runtime

  The legacy LoadBIOS() function in Source/ee/Ee_SubSystem.cpp references
  "./vfs/rom0/scph10000.bin" but this call is commented out in PS2VM::ResetVM()
  and has no effect on emulation.

  mc2_ings.ico is not referenced anywhere in Play! source code. That file is
  specific to PCSX2's memory card icon handling, not Play!.

  The libretro core supports: .elf, .iso, .cso, .isz, .bin disc images.
  Extensions handled in main_libretro.cpp:retro_get_system_info().